title
ES6 JavaScript Tutorial for Beginners - Getting Started

description
Learn all you need to know about modern ES6 JavaScript! Join the full ES6 JavaScript course: https://acad.link/es6 Exclusive discount also available for our JavaScript Bootcamp course: https://acad.link/js Check out all our other courses: https://academind.com/learn/our-courses ---------- • Go to https://www.academind.com and subscribe to our newsletter to stay updated and to get exclusive content & discounts • Follow @maxedapps and @academind_real on Twitter • Join our Facebook community on https://www.facebook.com/academindchannel/ See you in the videos! ---------- Academind is your source for online education in the areas of web development, frontend web development, backend web development, programming, coding and data science! No matter if you are looking for a tutorial, a course, a crash course, an introduction, an online tutorial or any related video, we try our best to offer you the content you are looking for. Our topics include Angular, React, Vue, Html, CSS, JavaScript, TypeScript, Redux, Nuxt.js, RxJs, Bootstrap, Laravel, Node.js, Progressive Web Apps (PWA), Ionic, React Native, Regular Expressions (RegEx), Stencil, Power BI, Amazon Web Services (AWS), Firebase or other topics, make sure to have a look at this channel or at academind.com to find the learning resource of your choice!

detail
{'title': 'ES6 JavaScript Tutorial for Beginners - Getting Started', 'heatmap': [{'end': 412.005, 'start': 353.254, 'weight': 1}, {'end': 1061.353, 'start': 1009.578, 'weight': 0.718}, {'end': 3311.76, 'start': 3265.246, 'weight': 0.776}], 'summary': "The es6 javascript tutorial covers the importance of javascript in web development, es6 introduction, syntax changes, arrow functions, 'this' keyword, default values, rest and spread operators, destructuring, emphasizing the need for setting up a local es6 development environment, and highlighting es6 features and additions.", 'chapters': [{'end': 189.968, 'segs': [{'end': 189.968, 'src': 'embed', 'start': 138.218, 'weight': 0, 'content': [{'end': 147.279, 'text': "It's a great website which allows you to, if you just check JavaScript and console up here, write JavaScript code on the left and then,", 'start': 138.218, 'duration': 9.061}, {'end': 155.542, 'text': "if you log something to the console and hit run, you'll see it show up on the right.", 'start': 147.279, 'duration': 8.263}, {'end': 158.364, 'text': 'And I will use this format throughout the course,', 'start': 156.202, 'duration': 2.162}, {'end': 164.868, 'text': 'since it allows me to really focus on individual topics and show how they work and quickly play around with them,', 'start': 158.364, 'duration': 6.504}, {'end': 172.332, 'text': 'without having to mess around with HTML and changing something in on the HTML page which you then would not see, and so on.', 'start': 164.868, 'duration': 7.464}, {'end': 179.517, 'text': 'So rarely I will come back to using HTML and actually showing something on the page,', 'start': 172.933, 'duration': 6.584}, {'end': 183.14, 'text': 'but most of the time I will just stick to JavaScript and the console.', 'start': 180.037, 'duration': 3.103}, {'end': 189.968, 'text': "Now, and if you rightfully say well, my application won't just log things to the console, well,", 'start': 183.781, 'duration': 6.187}], 'summary': 'The website allows writing and running javascript code, focusing on individual topics without html.', 'duration': 51.75, 'max_score': 138.218, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/IEf1KAcK6A8/pics/IEf1KAcK6A8138218.jpg'}], 'start': 1.084, 'title': 'Javascript bootcamp and es6 introduction', 'summary': 'Introduces the importance of javascript in web development and offers the first module of the javascript bootcamp and es6 bootcamp for free, providing basics and changes with es6 for working with javascript. it also explains the distinction between es5 and es6, highlighting es6 as the next-gen version with new features and the need for polyfills or transpilers to run es6 code in browsers, focusing on es6 throughout the course, and utilizing jsbin.com for practical demonstrations.', 'chapters': [{'end': 53.512, 'start': 1.084, 'title': 'Javascript bootcamp and es6 introduction', 'summary': 'Introduces the importance of javascript in web development, offering the first module of the javascript bootcamp and es6 bootcamp for free on the channel to provide the basics and changes with es6 for working with javascript.', 'duration': 52.428, 'highlights': ['The chapter introduces the importance of JavaScript in web development, offering the first module of the JavaScript Bootcamp and ES6 Bootcamp for free on the channel to provide the basics and changes with ES6 for working with JavaScript.', 'The free videos or this free video should get you started and give you the very basics you need.', 'JavaScript is rather important as a web development language nowadays.']}, {'end': 189.968, 'start': 54.699, 'title': 'Understanding es5 and es6', 'summary': 'Explains the distinction between es5 and es6, highlighting es6 as the next-gen version with new features and the need for polyfills or transpilers to run es6 code in browsers, focusing on es6 throughout the course, and utilizing jsbin.com for practical demonstrations.', 'duration': 135.269, 'highlights': ['ES6 is the next-gen version with new features, requiring polyfills or transpilers to run ES6 code in browsers, allowing the use of ES6 features today (e.g., jsbin.com format).', 'ES5 is the current version running in browsers, supported by all browsers, while ES6 needs polyfills or transpilers for compatibility.', 'jsbin.com allows focusing on individual topics and quick experimentation with JavaScript code without HTML manipulation, highlighting practical demonstrations throughout the course.']}], 'duration': 188.884, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/IEf1KAcK6A8/pics/IEf1KAcK6A81084.jpg', 'highlights': ['The chapter introduces the importance of JavaScript in web development, offering the first module of the JavaScript Bootcamp and ES6 Bootcamp for free on the channel to provide the basics and changes with ES6 for working with JavaScript.', 'ES6 is the next-gen version with new features, requiring polyfills or transpilers to run ES6 code in browsers, allowing the use of ES6 features today (e.g., jsbin.com format).', 'jsbin.com allows focusing on individual topics and quick experimentation with JavaScript code without HTML manipulation, highlighting practical demonstrations throughout the course.', 'The free videos or this free video should get you started and give you the very basics you need.', 'ES5 is the current version running in browsers, supported by all browsers, while ES6 needs polyfills or transpilers for compatibility.', 'JavaScript is rather important as a web development language nowadays.']}, {'end': 518.529, 'segs': [{'end': 251.45, 'src': 'embed', 'start': 222.611, 'weight': 0, 'content': [{'end': 226.914, 'text': "Hey, in the last lecture you saw the format I'll use throughout this course.", 'start': 222.611, 'duration': 4.303}, {'end': 232.517, 'text': 'So I will use JS Spin, a web page to show all the ES6 features and how it works.', 'start': 227.134, 'duration': 5.383}, {'end': 235.319, 'text': 'And I explained why I do it like this in the last video.', 'start': 232.897, 'duration': 2.422}, {'end': 243.804, 'text': "However, if you build your own applications and you want to use ES6, you'll probably do that on your local machine right?", 'start': 236.099, 'duration': 7.705}, {'end': 251.45, 'text': 'So you need to know how to set this up, how to set up a development environment which allows you to use ES6 on your local machine.', 'start': 244.165, 'duration': 7.285}], 'summary': 'Using js spin to demonstrate es6 features for learning and setting up a local development environment for es6 usage.', 'duration': 28.839, 'max_score': 222.611, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/IEf1KAcK6A8/pics/IEf1KAcK6A8222611.jpg'}, {'end': 412.005, 'src': 'heatmap', 'start': 353.254, 'weight': 1, 'content': [{'end': 360.801, 'text': 'Attached to this video, you will find a document leading to some example setups or boilerplates on GitHub,', 'start': 353.254, 'duration': 7.547}, {'end': 369.27, 'text': 'which you can simply clone to get started and where you can dive into to learn more about how they are set up and which compiler and so on they use.', 'start': 360.801, 'duration': 8.469}, {'end': 374.273, 'text': 'For example, here I have this vanilla ES6 JSPM package open,', 'start': 369.89, 'duration': 4.383}, {'end': 381.316, 'text': 'which also uses JSPM JavaScript Package Manager to load all those packages needed to work with ES6..', 'start': 374.273, 'duration': 7.043}, {'end': 388.981, 'text': 'And you can simply follow the instructions on this page to set up a local ES6 development environment quickly.', 'start': 382.037, 'duration': 6.944}, {'end': 394.484, 'text': 'Of course, you will find a link to that repository in the video or in the document attached to this video.', 'start': 389.281, 'duration': 5.203}, {'end': 408.263, 'text': "Hi!, An important thing to realize is you're learning ES6, but it's not natively supported by all browsers,", 'start': 401.038, 'duration': 7.225}, {'end': 412.005, 'text': 'or all the features are not natively supported by all browsers yet.', 'start': 408.263, 'duration': 3.742}], 'summary': 'Learn es6 through github boilerplates, jspm for package loading, and setup instructions for local es6 development environment.', 'duration': 58.751, 'max_score': 353.254, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/IEf1KAcK6A8/pics/IEf1KAcK6A8353254.jpg'}], 'start': 189.968, 'title': 'Es6 features and setting up development environment', 'summary': 'Covers es6 features, format, usage, and preparation for the final project. it also emphasizes the need for setting up a local es6 development environment, including tools like babel and webpack, for compatibility with browsers and improved workflow.', 'chapters': [{'end': 243.804, 'start': 189.968, 'title': 'Es6 features and usage', 'summary': 'Discusses the format used to demonstrate es6 features, including the use of js spin and the intention to provide numerous concise examples, preparing the audience for the final project in the course.', 'duration': 53.836, 'highlights': ['The format used to demonstrate ES6 features, including the use of JS Spin, is discussed, emphasizing its effectiveness in providing numerous concise examples (e.g. logging to the console, altering HTML) to quickly understand new concepts being added with ES6.', 'The intention to prepare the audience for the final project in the course, where ES6 features will be utilized, is mentioned.']}, {'end': 518.529, 'start': 244.165, 'title': 'Setting up es6 development environment', 'summary': 'Explains the need for setting up a local es6 development environment, including the use of a compiler, module loader, and a server, and highlights the importance of compatibility with browsers and the availability of tools like babel and webpack.', 'duration': 274.364, 'highlights': ['The importance of setting up a local ES6 development environment is emphasized, including the need for a compiler, module loader, and a server, with tools like Babel and Webpack being essential (quantifiable: importance of setting up local environment).', 'Compatibility with browsers and the need for a compiler to use ES6 features not natively supported by all browsers are highlighted, with a reference to a GitHub page providing a compatibility chart for different browser versions and possible compilers (quantifiable: need for a compiler and compatibility with browsers).', 'A document with example setups and boilerplates on GitHub is mentioned, providing resources for setting up the local ES6 development environment, and links to repositories for further instructions (quantifiable: availability of example setups and resources for setting up local environment).']}], 'duration': 328.561, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/IEf1KAcK6A8/pics/IEf1KAcK6A8189968.jpg', 'highlights': ['The importance of setting up a local ES6 development environment is emphasized, including the need for a compiler, module loader, and a server, with tools like Babel and Webpack being essential.', 'Compatibility with browsers and the need for a compiler to use ES6 features not natively supported by all browsers are highlighted, with a reference to a GitHub page providing a compatibility chart for different browser versions and possible compilers.', 'The format used to demonstrate ES6 features, including the use of JS Spin, is discussed, emphasizing its effectiveness in providing numerous concise examples to quickly understand new concepts being added with ES6.', 'The intention to prepare the audience for the final project in the course, where ES6 features will be utilized, is mentioned.', 'A document with example setups and boilerplates on GitHub is mentioned, providing resources for setting up the local ES6 development environment, and links to repositories for further instructions.']}, {'end': 1158.544, 'segs': [{'end': 596.692, 'src': 'embed', 'start': 543.691, 'weight': 1, 'content': [{'end': 553.679, 'text': 'So let and const are new keywords added by ES6 and they allow us to change the way we work with variables or, like the name,', 'start': 543.691, 'duration': 9.988}, {'end': 555.46, 'text': 'const implies use constants.', 'start': 553.679, 'duration': 1.781}, {'end': 561.723, 'text': 'So before I come to the question why we need that let me first show you how it works.', 'start': 556.581, 'duration': 5.142}, {'end': 570.627, 'text': 'Imagine we have the variable name and in the past would have said name equals max, for example, and this will still work.', 'start': 562.624, 'duration': 8.003}, {'end': 575.83, 'text': 'if I print this name to the console will of course see max.', 'start': 570.627, 'duration': 5.203}, {'end': 583.473, 'text': 'So var still exists with ES6 and of course that will always be the case since we need it for backward compatibility.', 'start': 576.77, 'duration': 6.703}, {'end': 587.878, 'text': 'However, ES6 also offers a different way to create a variable.', 'start': 584.352, 'duration': 3.526}, {'end': 589.36, 'text': 'We can use let.', 'start': 588.138, 'duration': 1.222}, {'end': 596.692, 'text': 'Now with let, what do you think will happen if I hit run? We still see Max.', 'start': 590.442, 'duration': 6.25}], 'summary': 'Es6 introduces let and const for variable declaration, maintaining backward compatibility with var.', 'duration': 53.001, 'max_score': 543.691, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/IEf1KAcK6A8/pics/IEf1KAcK6A8543691.jpg'}, {'end': 1061.353, 'src': 'heatmap', 'start': 998.433, 'weight': 5, 'content': [{'end': 1009.578, 'text': "I'm really stressing this because this is important to understand how constants work here and why you are able to change the constant or,", 'start': 998.433, 'duration': 11.145}, {'end': 1017.421, 'text': "to be precise, to change the value of that constant if you're using with reference types, because you're not really changing the value,", 'start': 1009.578, 'duration': 7.843}, {'end': 1019.382, 'text': 'only the value to which the pointer is pointing.', 'start': 1017.421, 'duration': 1.961}, {'end': 1029.404, 'text': 'We also have important implications regarding hoisting.', 'start': 1026.223, 'duration': 3.181}, {'end': 1034.503, 'text': 'Remember, hoisting referred to the fact that I could set something like this.', 'start': 1030.124, 'duration': 4.379}, {'end': 1045.165, 'text': 'I could set my age to 27 and then I could print my age and I could define it thereafter like this or declare it like this.', 'start': 1034.523, 'duration': 10.642}, {'end': 1047.527, 'text': 'If I hit run, this would work.', 'start': 1045.746, 'duration': 1.781}, {'end': 1052.048, 'text': "Now, let's see if it also works if I use let.", 'start': 1048.967, 'duration': 3.081}, {'end': 1060.032, 'text': 'What do you think will happen if I hit run? Well, since I was asking like this, you probably expected this result.', 'start': 1052.988, 'duration': 7.044}, {'end': 1061.353, 'text': "We're getting an error.", 'start': 1060.452, 'duration': 0.901}], 'summary': 'Understanding how constants work with reference types and hoisting implications.', 'duration': 30.971, 'max_score': 998.433, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/IEf1KAcK6A8/pics/IEf1KAcK6A8998433.jpg'}, {'end': 1129.021, 'src': 'embed', 'start': 1088.989, 'weight': 0, 'content': [{'end': 1094.312, 'text': "it's better to get a clear error if you forget the declaration before the initialization.", 'start': 1088.989, 'duration': 5.323}, {'end': 1097.533, 'text': 'so if i run this code well, we see 27.', 'start': 1094.312, 'duration': 3.221}, {'end': 1102.516, 'text': 'so this works, and again, i think this is a change that really makes sense.', 'start': 1097.533, 'duration': 4.983}, {'end': 1115.833, 'text': 'what, of course, still will work is if we have a function, do something, and here we, for example, have our age variable,', 'start': 1102.516, 'duration': 13.317}, {'end': 1129.021, 'text': 'set it to 27 and then i have flat h like this.', 'start': 1115.833, 'duration': 13.188}], 'summary': 'Code runs successfully, output is 27, highlighting a sensible change.', 'duration': 40.032, 'max_score': 1088.989, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/IEf1KAcK6A8/pics/IEf1KAcK6A81088989.jpg'}], 'start': 518.909, 'title': 'Es6 syntax changes and constants', 'summary': "Explores es6 syntax changes, such as 'let' and 'const' keywords, and their impact on block scoping. it also discusses the behavior of constants with reference types, emphasizing their implications on memory and hoisting with let and const variables.", 'chapters': [{'end': 902.821, 'start': 518.909, 'title': 'Es6 syntax changes and additions', 'summary': "Explores the introduction of 'let' and 'const' keywords in es6, highlighting their ability to enable block scoping and create constants, with examples demonstrating their usage and impact on variable behavior.", 'duration': 383.912, 'highlights': ["The introduction of 'let' and 'const' in ES6 enables block scoping and the creation of constants, offering a different approach to variable declaration compared to 'var', ensuring variables are contained within specific blocks. ES6 introduces 'let' and 'const' to enable block scoping and create constants, offering a different approach to variable declaration compared to 'var', ensuring variables are contained within specific blocks.", "The utilization of 'let' allows for block scoping, restricting the accessibility of variables to specific blocks and preventing changes or access from outside the block, thereby resolving previous confusions and enhancing code clarity. 'let' enables block scoping, restricting the accessibility of variables to specific blocks and preventing changes or access from outside the block, enhancing code clarity.", "On the other hand, 'const' creates constants that cannot be reassigned, maintaining a fixed value once defined, with attempted reassignment resulting in an error, signifying the immutability of constants. 'const' creates constants that cannot be reassigned, maintaining a fixed value once defined, with attempted reassignment resulting in an error, signifying the immutability of constants."]}, {'end': 1158.544, 'start': 902.941, 'title': 'Constants and reference types', 'summary': 'Explains how constants behave with reference types, highlighting that constants hold pointers to values in memory for arrays and objects, and the implications of hoisting with let and const variables.', 'duration': 255.603, 'highlights': ['Constants hold pointers to values in memory for arrays and objects, allowing manipulation of the values without changing the constant itself. The chapter emphasizes that constants hold pointers to values in memory for arrays and objects, enabling the manipulation of values without changing the constant itself.', 'The implications of hoisting are discussed, emphasizing the difference in behavior between var, let, and const variables, with const variables requiring declaration before initialization. The chapter discusses the implications of hoisting, highlighting the difference in behavior between var, let, and const variables, with const variables requiring declaration before initialization.', 'Demonstration of variable declaration and initialization within a function is provided, illustrating the validity of the approach when the variable is declared before it is used. The chapter provides a demonstration of variable declaration and initialization within a function, emphasizing the validity of the approach when the variable is declared before it is used.']}], 'duration': 639.635, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/IEf1KAcK6A8/pics/IEf1KAcK6A8518909.jpg', 'highlights': ["The introduction of 'let' and 'const' in ES6 enables block scoping and the creation of constants, offering a different approach to variable declaration compared to 'var', ensuring variables are contained within specific blocks.", "The utilization of 'let' allows for block scoping, restricting the accessibility of variables to specific blocks and preventing changes or access from outside the block, thereby resolving previous confusions and enhancing code clarity.", "On the other hand, 'const' creates constants that cannot be reassigned, maintaining a fixed value once defined, with attempted reassignment resulting in an error, signifying the immutability of constants.", 'Constants hold pointers to values in memory for arrays and objects, allowing manipulation of the values without changing the constant itself.', 'The implications of hoisting are discussed, emphasizing the difference in behavior between var, let, and const variables, with const variables requiring declaration before initialization.', 'Demonstration of variable declaration and initialization within a function is provided, illustrating the validity of the approach when the variable is declared before it is used.']}, {'end': 1573.32, 'segs': [{'end': 1416.115, 'src': 'embed', 'start': 1364.96, 'weight': 2, 'content': [{'end': 1366.522, 'text': 'And then I can do whatever I want to do.', 'start': 1364.96, 'duration': 1.562}, {'end': 1373.212, 'text': 'For example, I might have my variable A and my variable B.', 'start': 1366.602, 'duration': 6.61}, {'end': 1376.055, 'text': 'And I want to return A plus B.', 'start': 1373.212, 'duration': 2.843}, {'end': 1377.618, 'text': "If I now hit run, what do you think we'll see?", 'start': 1376.055, 'duration': 1.563}, {'end': 1380.571, 'text': 'We see five.', 'start': 1379.67, 'duration': 0.901}, {'end': 1387.379, 'text': "so we're using this function body like we would use it in a normal function or like in the function.", 'start': 1380.571, 'duration': 6.808}, {'end': 1390.323, 'text': 'we know it from the ES5 syntax.', 'start': 1387.379, 'duration': 2.944}, {'end': 1397.992, 'text': 'So this works fine, but we also have the shorter way of writing it if we only have to return statement the way you saw before.', 'start': 1390.724, 'duration': 7.268}, {'end': 1400.823, 'text': "Now let's also talk about the arguments.", 'start': 1399.102, 'duration': 1.721}, {'end': 1406.988, 'text': "I'm not passing any arguments and I said that you need to provide this empty pair of parentheses in this case.", 'start': 1401.324, 'duration': 5.664}, {'end': 1416.115, 'text': "So how does this change if I actually do pass arguments? Let's say I want to pass A and B to it.", 'start': 1407.809, 'duration': 8.306}], 'summary': 'The transcript discusses using functions in javascript, including examples of returning values and passing arguments.', 'duration': 51.155, 'max_score': 1364.96, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/IEf1KAcK6A8/pics/IEf1KAcK6A81364960.jpg'}, {'end': 1500.048, 'src': 'embed', 'start': 1440.292, 'weight': 0, 'content': [{'end': 1450.498, 'text': "Now note, of course, that I, again, can get rid of everything but the a plus b term here since I'm only having one line and I'm returning this.", 'start': 1440.292, 'duration': 10.206}, {'end': 1452.159, 'text': 'So if I hit run with that..', 'start': 1451.058, 'duration': 1.101}, {'end': 1457.718, 'text': 'I also see 11.', 'start': 1455.376, 'duration': 2.342}, {'end': 1467.426, 'text': "Now, the cool thing is, if I only have one argument, so let's say I don't have b, but this is always 5, so I'm only passing a.", 'start': 1457.718, 'duration': 9.708}, {'end': 1474.232, 'text': 'What do you think will happen if I call this function like this? Well, I get 8.', 'start': 1467.426, 'duration': 6.806}, {'end': 1480.47, 'text': "And what do you think will happen if I still pass another argument? Well, it's ignored.", 'start': 1474.232, 'duration': 6.238}, {'end': 1482.091, 'text': 'I still get 8.', 'start': 1480.651, 'duration': 1.44}, {'end': 1483.452, 'text': "But here's another cool feature.", 'start': 1482.091, 'duration': 1.361}, {'end': 1487.674, 'text': 'If I only have one argument, then I may leave out the parentheses.', 'start': 1483.732, 'duration': 3.942}, {'end': 1489.695, 'text': "And that's important to know.", 'start': 1488.635, 'duration': 1.06}, {'end': 1497.019, 'text': "That is the only condition or the only case where I don't need parentheses if I have one argument.", 'start': 1490.275, 'duration': 6.744}, {'end': 1500.048, 'text': 'If I have no arguments, I need anti parentheses.', 'start': 1497.426, 'duration': 2.622}], 'summary': 'Demonstrating function behavior with different arguments and parentheses.', 'duration': 59.756, 'max_score': 1440.292, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/IEf1KAcK6A8/pics/IEf1KAcK6A81440292.jpg'}], 'start': 1158.985, 'title': 'Es6 and arrow function syntax', 'summary': 'Introduces es6 functions syntax including the use of fat arrow syntax, shorter way of writing single-line functions, and the feature of automatically returning a value. it also explains the core syntax of arrow functions, demonstrating concise and shorter ways of writing functions, and its behavior such as passing arguments, ignoring extra arguments, and allowing omission of parentheses for single arguments.', 'chapters': [{'end': 1390.323, 'start': 1158.985, 'title': 'Es6 functions syntax', 'summary': 'Introduces the es6 functions syntax, highlighting the use of fat arrow syntax for writing functions, the shorter way of writing single-line functions, and the feature of automatically returning a value for single-line functions.', 'duration': 231.338, 'highlights': ['ES6 introduces a new syntax using fat arrow for writing functions ES6 introduces a new syntax using fat arrow for writing functions, providing a different way to define functions and allowing for shorter syntax.', 'Shorter way of writing single-line functions by omitting curly braces ES6 allows for a shorter way of writing single-line functions by omitting curly braces, simplifying the syntax and making the code more concise.', "Automatically returning a value for single-line functions ES6 allows for automatically returning a value for single-line functions, eliminating the need for the 'return' keyword and making the code more compact."]}, {'end': 1573.32, 'start': 1390.724, 'title': 'Arrow functions and syntax basics', 'summary': 'Explains the core syntax of arrow functions, demonstrating concise and shorter ways of writing functions and how it allows for passing arguments and its behavior, such as ignoring extra arguments and allowing omission of parentheses for single arguments.', 'duration': 182.596, 'highlights': ['Arrow functions provide a more concise and shorter way of writing functions, saving characters and allowing for a more compact syntax. Demonstrates the advantage of arrow functions in saving characters and writing functions in a more concise and shorter way.', 'Behavior of arrow functions when passing arguments, including ignoring extra arguments and allowing omission of parentheses for single arguments. Explains the behavior of arrow functions when passing arguments, such as ignoring extra arguments and allowing omission of parentheses for single arguments.', 'Demonstrates the usage of arrow functions in setTimeout function for callbacks, showcasing the practical application of arrow functions. Showcases the usage of arrow functions in a practical application, specifically in the setTimeout function for callbacks.']}], 'duration': 414.335, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/IEf1KAcK6A8/pics/IEf1KAcK6A81158985.jpg', 'highlights': ['ES6 introduces a new syntax using fat arrow for writing functions, providing a different way to define functions and allowing for shorter syntax.', 'Shorter way of writing single-line functions by omitting curly braces, simplifying the syntax and making the code more concise.', "Automatically returning a value for single-line functions, eliminating the need for the 'return' keyword and making the code more compact.", 'Arrow functions provide a more concise and shorter way of writing functions, saving characters and allowing for a more compact syntax.', 'Behavior of arrow functions when passing arguments, including ignoring extra arguments and allowing omission of parentheses for single arguments.', 'Showcases the usage of arrow functions in a practical application, specifically in the setTimeout function for callbacks.']}, {'end': 1958.147, 'segs': [{'end': 1672.549, 'src': 'embed', 'start': 1645.942, 'weight': 1, 'content': [{'end': 1654.026, 'text': "I'll create a new function, the traditional style, and in this function all I want to do is I want to log this.", 'start': 1645.942, 'duration': 8.084}, {'end': 1660.25, 'text': "Now I'm going to comment out the timeout for now because I first want to show something else.", 'start': 1655.527, 'duration': 4.723}, {'end': 1662.151, 'text': 'I will also give this function a name.', 'start': 1660.27, 'duration': 1.881}, {'end': 1663.131, 'text': "Let's name it fn.", 'start': 1662.271, 'duration': 0.86}, {'end': 1671.208, 'text': 'If I call fn here, what would you expect to see if I hit run? Well, we get the window object.', 'start': 1664.292, 'duration': 6.916}, {'end': 1672.549, 'text': "That's what we see here.", 'start': 1671.568, 'duration': 0.981}], 'summary': "Creating a new function named 'fn' logs the window object.", 'duration': 26.607, 'max_score': 1645.942, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/IEf1KAcK6A8/pics/IEf1KAcK6A81645942.jpg'}, {'end': 1936.311, 'src': 'embed', 'start': 1884.826, 'weight': 0, 'content': [{'end': 1892.811, 'text': "you won't need bind or apply or call all those workarounds you used with es5 to get this to the right context,", 'start': 1884.826, 'duration': 7.985}, {'end': 1897.314, 'text': 'but it will just keep the context in which this function is defined.', 'start': 1892.811, 'duration': 4.503}, {'end': 1906.08, 'text': 'so if this refers to the window object here, it will refer to that window object, no matter how or where you call this at this function here,', 'start': 1897.314, 'duration': 8.766}, {'end': 1914.708, 'text': "this fn2 function that's super important to take away, and the other function, The old style, which you may still use.", 'start': 1906.08, 'duration': 8.628}, {'end': 1916.029, 'text': "it's not bad by any means.", 'start': 1914.708, 'duration': 1.321}, {'end': 1922.178, 'text': "It's just important to understand here this will behave like you know it to behave in JavaScript.", 'start': 1916.39, 'duration': 5.788}, {'end': 1924.341, 'text': 'It will change to what it refers.', 'start': 1922.499, 'duration': 1.842}, {'end': 1928.187, 'text': 'And that is a super important key difference.', 'start': 1925.062, 'duration': 3.125}, {'end': 1936.311, 'text': 'So that has been the fat arrow function.', 'start': 1934.249, 'duration': 2.062}], 'summary': "Fat arrow function in es6 maintains the context of 'this' and behaves as expected in javascript.", 'duration': 51.485, 'max_score': 1884.826, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/IEf1KAcK6A8/pics/IEf1KAcK6A81884826.jpg'}], 'start': 1573.32, 'title': "Javascript 'this' keyword", 'summary': "Discusses the usage of error functions in javascript and their impact on the 'this' keyword, highlighting the difference between traditional and arrow functions and demonstrating their behavior in referring to the global scope. it also explains the behavior of 'this' in javascript, emphasizing the advantage of arrow functions in maintaining context without workarounds.", 'chapters': [{'end': 1730.287, 'start': 1573.32, 'title': "Understanding javascript 'this' keyword", 'summary': "Discusses the usage of error functions in javascript and their impact on the 'this' keyword, highlighting how traditional and arrow functions differ in their behavior, ultimately demonstrating that both still refer to the global scope.", 'duration': 156.967, 'highlights': ["The 'this' keyword in JavaScript can lead to unexpected code behavior and misunderstandings, and it is often assigned to different parts or objects, causing problems (e.g., referring to the global scope).", "Error functions in JavaScript behave similarly to normal functions, but with a different syntax, and they can be utilized wherever normal functions are used, with the exception that they have a big addition related to the 'this' keyword.", "The behavior of the 'this' keyword in traditional and arrow functions is demonstrated, revealing that both types of functions still refer to the global context, with the examples showing that 'this' remains associated with the window object in both cases."]}, {'end': 1958.147, 'start': 1731.387, 'title': "Understanding 'this' in javascript", 'summary': "Explains the behavior of 'this' in javascript, demonstrating the difference between using the old style function and the arrow function, and emphasizing the key advantage of arrow functions in maintaining the context without the need for workarounds.", 'duration': 226.76, 'highlights': ["The key difference between the old style function and the arrow function is how 'this' is treated, with the arrow function maintaining its context and not requiring workarounds like bind, apply, or call (ES5) to get 'this' to the right context.", "The demonstration of the arrow function's behavior in maintaining the context by referring to the window object, regardless of how or where the function is called, serves as a crucial takeaway.", "The importance of understanding the distinction between the behavior of 'this' in the old style function and the arrow function, with the latter providing the advantage of maintaining context without the need for workarounds, is highlighted as a key addition in ES6."]}], 'duration': 384.827, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/IEf1KAcK6A8/pics/IEf1KAcK6A81573320.jpg', 'highlights': ['The arrow function maintains its context without requiring workarounds like bind, apply, or call.', "Error functions in JavaScript behave similarly to normal functions but have a big addition related to the 'this' keyword.", "The 'this' keyword in JavaScript can lead to unexpected code behavior and misunderstandings, often referring to the global scope.", "The behavior of 'this' in traditional and arrow functions is demonstrated, revealing that both types still refer to the global context.", "Understanding the distinction between 'this' in old style functions and arrow functions is crucial, with the latter providing the advantage of maintaining context without workarounds."]}, {'end': 2273.821, 'segs': [{'end': 2056.016, 'src': 'embed', 'start': 2026.253, 'weight': 1, 'content': [{'end': 2028.573, 'text': 'So these are default values.', 'start': 2026.253, 'duration': 2.32}, {'end': 2036.276, 'text': 'Now, I can also assign a default value to number, and now I can call this function without any arguments at all.', 'start': 2029.594, 'duration': 6.682}, {'end': 2038.535, 'text': 'And I still get true.', 'start': 2037.594, 'duration': 0.941}, {'end': 2047.824, 'text': "Now what happens if I do this? I set number to be a default of 10, but compare doesn't get a default value.", 'start': 2039.576, 'duration': 8.248}, {'end': 2050.987, 'text': 'And now I call this function with 10.', 'start': 2048.143, 'duration': 2.844}, {'end': 2056.016, 'text': 'What do you think will happen if I hit run? I get false.', 'start': 2050.987, 'duration': 5.029}], 'summary': 'Default values assigned to variables affect function behavior. without argument, true is returned; with 10, false is returned.', 'duration': 29.763, 'max_score': 2026.253, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/IEf1KAcK6A8/pics/IEf1KAcK6A82026253.jpg'}, {'end': 2225.277, 'src': 'embed', 'start': 2196.694, 'weight': 0, 'content': [{'end': 2200.336, 'text': "Let's say we have a, which is 100, and I do this.", 'start': 2196.694, 'duration': 3.642}, {'end': 2209.401, 'text': 'What do you think will happen if I now hit run? Well, now compare is 100, so we may use our variables from outside of this function as well.', 'start': 2200.556, 'duration': 8.845}, {'end': 2215.185, 'text': 'now. with that being said, what do you think will happen if i do this?', 'start': 2210.839, 'duration': 4.346}, {'end': 2225.277, 'text': "i said compare to 10, and i set number to be equal to compare, and then i'm calling this function without any arguments.", 'start': 2215.185, 'duration': 10.092}], 'summary': 'Using compare=100, setting number=compare, and calling function without arguments.', 'duration': 28.583, 'max_score': 2196.694, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/IEf1KAcK6A8/pics/IEf1KAcK6A82196694.jpg'}], 'start': 1959.308, 'title': 'Default values in es6 and python functions', 'summary': 'Explains how es6 and python allow assigning default values to function arguments, demonstrating their impact on comparisons and showing their behavior in different scenarios. it also highlights the limitations and advantages of default argument usage.', 'chapters': [{'end': 2123.247, 'start': 1959.308, 'title': 'Es6 default values', 'summary': 'Explains how es6 allows assigning default values to function arguments, demonstrating the impact on comparisons and showing the behavior of default values in different scenarios, such as calling the function with only one argument resulting in a false outcome.', 'duration': 163.939, 'highlights': ["ES6 allows assigning default values to function arguments, impacting the behavior of comparisons and function calls, as demonstrated by setting default values for 'compare' and 'number' arguments.", "By assigning a default value of zero to 'compare' and passing only one argument to the function, a false outcome is obtained, illustrating the impact of default values on comparisons.", "When setting 'number' to have a default value but not assigning a default value to 'compare', calling the function with one argument still results in 'number' being set and 'compare' being undefined, leading to a false outcome."]}, {'end': 2273.821, 'start': 2123.987, 'title': 'Default argument in python function', 'summary': 'Discusses using default arguments in a python function, demonstrating the behavior of default and non-default arguments, and the usage of external variables, highlighting the limitations and advantages of default argument usage.', 'duration': 149.834, 'highlights': ['The function showcases the behavior of default and non-default arguments, where the default argument value is assigned if no distinct value is provided, with the example resulting in 11, 11, and true when compare is set equal to number.', 'The limitations of using default arguments are highlighted, as attempting to use a variable before it is defined results in an error, demonstrating the inability to set something equal to a variable that does not exist yet.', 'The advantages of using default arguments are demonstrated, as setting compare equal to number results in true, showcasing the ability to use a variable that has already been defined, and both values being 10.']}], 'duration': 314.513, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/IEf1KAcK6A8/pics/IEf1KAcK6A81959308.jpg', 'highlights': ['ES6 allows assigning default values to function arguments, impacting the behavior of comparisons and function calls.', "By assigning a default value of zero to 'compare' and passing only one argument to the function, a false outcome is obtained, illustrating the impact of default values on comparisons.", 'The function showcases the behavior of default and non-default arguments, where the default argument value is assigned if no distinct value is provided, with the example resulting in 11, 11, and true when compare is set equal to number.', 'The limitations of using default arguments are highlighted, as attempting to use a variable before it is defined results in an error, demonstrating the inability to set something equal to a variable that does not exist yet.', 'The advantages of using default arguments are demonstrated, as setting compare equal to number results in true, showcasing the ability to use a variable that has already been defined, and both values being 10.']}, {'end': 2796.882, 'segs': [{'end': 2401.222, 'src': 'embed', 'start': 2377.657, 'weight': 1, 'content': [{'end': 2386.599, 'text': 'What do you think will happen if I hit run? Well, actually, the object will take the values from the surrounding variables.', 'start': 2377.657, 'duration': 8.942}, {'end': 2391.86, 'text': "So if we're not specifying values in here to initialize this object with,", 'start': 2387.379, 'duration': 4.481}, {'end': 2400.642, 'text': 'it will automatically look if it has variables declared before the declaration of this object here which match the property names here.', 'start': 2391.86, 'duration': 8.782}, {'end': 2401.222, 'text': 'So name, name.', 'start': 2400.662, 'duration': 0.56}], 'summary': 'Running the code will initialize the object with surrounding variable values.', 'duration': 23.565, 'max_score': 2377.657, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/IEf1KAcK6A8/pics/IEf1KAcK6A82377657.jpg'}, {'end': 2495.468, 'src': 'embed', 'start': 2462.55, 'weight': 0, 'content': [{'end': 2468.033, 'text': "Now, if I call object.greet, what do you think we'll see?", 'start': 2462.55, 'duration': 5.483}, {'end': 2483.722, 'text': 'We got max 25, and so this name refers to the name in here, and this age refers to our age, which is set with the variable outside of this code.', 'start': 2471.915, 'duration': 11.807}, {'end': 2486.846, 'text': 'there have also been some other additions.', 'start': 2484.986, 'duration': 1.86}, {'end': 2492.827, 'text': 'For example, you already knew that you could create property names as a string as well.', 'start': 2486.926, 'duration': 5.901}, {'end': 2495.468, 'text': 'You can also do this for methods.', 'start': 2493.367, 'duration': 2.101}], 'summary': 'Demonstrating object creation with properties and methods, including use of string property names and external variables.', 'duration': 32.918, 'max_score': 2462.55, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/IEf1KAcK6A8/pics/IEf1KAcK6A82462550.jpg'}], 'start': 2274.844, 'title': 'Javascript es6 features', 'summary': 'Explores javascript es6 features including default values in functions, arrow functions, object literals, and the rest operator, enhancing dynamic functions, property assignments, and function creation.', 'chapters': [{'end': 2322.272, 'start': 2274.844, 'title': 'Javascript default values and arrow functions', 'summary': 'Explores the benefits of default values in javascript functions, enabling more dynamic functions that can work with different parameter quantities, in combination with arrow functions, making it a big addition to javascript functions and helpful in day-to-day coding.', 'duration': 47.428, 'highlights': ['Default values enable the creation of more dynamic functions, working well in different circumstances, not necessarily requiring all parameters to be passed.', 'Default values can be set for parameters, allowing experimentation with different inputs and their interactions.', 'The combination of default values with arrow functions is a significant addition to JavaScript functions, providing practical assistance in daily coding.']}, {'end': 2796.882, 'start': 2322.873, 'title': 'Javascript object literals and rest operator', 'summary': 'Explains the additions to object literals in javascript or es6, including dynamically assigning property values and accessing them, creating properties and functions with string names, and the introduction of the rest operator.', 'duration': 474.009, 'highlights': ['JavaScript or ES6 added additions to object literals, including dynamically assigning property values and accessing them. The object literals in JavaScript or ES6 now allow for dynamically assigning property values from surrounding variables and accessing them, providing a shortcut to initialize objects with existing variable values.', 'Creation of properties and functions with string names is possible in JavaScript or ES6. In JavaScript or ES6, properties and functions can be created with string names, allowing for more flexibility and usage of names that would not be valid without quotation marks.', 'Introduction of the REST operator in JavaScript. The chapter introduces the REST operator in JavaScript, providing a practical approach for handling multiple function parameters as an array.']}], 'duration': 522.038, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/IEf1KAcK6A8/pics/IEf1KAcK6A82274844.jpg', 'highlights': ['Default values with arrow functions is a significant addition to JavaScript functions.', 'Object literals in JavaScript or ES6 allow dynamically assigning property values from surrounding variables.', 'Introduction of the REST operator in JavaScript provides a practical approach for handling multiple function parameters as an array.']}, {'end': 3169.958, 'segs': [{'end': 2887.565, 'src': 'embed', 'start': 2859.601, 'weight': 3, 'content': [{'end': 2870.546, 'text': 'we see an error, because it is extremely helpful to write this correctly as well as to use a semicolon here.', 'start': 2859.601, 'duration': 10.945}, {'end': 2874.268, 'text': 'So now if I hit run, we see 15, which is 5 plus 4 is 9, plus 3 is 12, 14, 15.', 'start': 2870.566, 'duration': 3.702}, {'end': 2874.99, 'text': 'Okay, so that works.', 'start': 2874.27, 'duration': 0.72}, {'end': 2875.431, 'text': "That's great.", 'start': 2875.03, 'duration': 0.401}, {'end': 2887.565, 'text': "Now, sometimes there are cases where you don't have the numbers you want to add or you want to work with the values you want to work with in an array.", 'start': 2879.034, 'duration': 8.531}], 'summary': 'Correcting code results in 15, demonstrating addition with numbers in an array.', 'duration': 27.964, 'max_score': 2859.601, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/IEf1KAcK6A8/pics/IEf1KAcK6A82859601.jpg'}, {'end': 3096.224, 'src': 'embed', 'start': 3035.782, 'weight': 0, 'content': [{'end': 3036.443, 'text': "That's important.", 'start': 3035.782, 'duration': 0.661}, {'end': 3040.54, 'text': 'We can use the rest operator in this function argument call.', 'start': 3037.236, 'duration': 3.304}, {'end': 3050.971, 'text': 'Now, kind of the opposite of the rest operator is the spread operator.', 'start': 3046.686, 'duration': 4.285}, {'end': 3055.636, 'text': 'Actually, it looks exactly the same, but you use it in different places.', 'start': 3051.451, 'duration': 4.185}, {'end': 3058.278, 'text': 'Where do you use it? Let me show you.', 'start': 3056.376, 'duration': 1.902}, {'end': 3070.493, 'text': "I'll first create a variable numbers, which is again an array of numbers, but this time I want to get the maximum.", 'start': 3059.286, 'duration': 11.207}, {'end': 3081.521, 'text': 'Now, I was already mentioning that you already have the max function on the math object, but if you try to pass numbers here,', 'start': 3071.114, 'duration': 10.407}, {'end': 3082.962, 'text': "what do you think you'll get if you hit run?", 'start': 3081.521, 'duration': 1.441}, {'end': 3094.623, 'text': 'not a number, because this max method here actually expects to get a list of arguments, a list of numbers and not an array.', 'start': 3085.316, 'duration': 9.307}, {'end': 3096.224, 'text': "Now that's bad,", 'start': 3095.503, 'duration': 0.721}], 'summary': 'Introducing the rest and spread operators for function arguments and arrays.', 'duration': 60.442, 'max_score': 3035.782, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/IEf1KAcK6A8/pics/IEf1KAcK6A83035782.jpg'}], 'start': 2798.167, 'title': 'Javascript rest and spread operators', 'summary': 'Demonstrates the use of rest parameter in javascript functions to handle variable number of arguments and convert list of values into an array. it also explains the rest and spread operators, illustrating their usage and differences in function arguments and calls.', 'chapters': [{'end': 2988.527, 'start': 2798.167, 'title': 'Javascript rest parameter', 'summary': 'Demonstrates the use of rest parameter in javascript functions to handle variable number of arguments and convert list of values into an array, resulting in concise and flexible function implementation.', 'duration': 190.36, 'highlights': ['The rest parameter allows handling a variable number of arguments in a function, converting a list of values into an array for flexible function implementation. The rest parameter is demonstrated to convert a list of values into an array, enabling the function to handle variable number of arguments in a concise and flexible manner.', "Use of the rest parameter is exemplified with the 'sum up' function, displaying its ability to work with both arrays and lists of values, resulting in a concise and adaptable function for adding numbers. The 'sum up' function showcases the rest parameter's capability to work with both arrays and lists of values, demonstrating its flexibility and adaptability for handling different input types.", 'The importance of correct syntax and usage of semicolons in JavaScript functions is emphasized, as demonstrated by the error encountered when the code is not written correctly. Emphasizes the importance of correct syntax and usage of semicolons in JavaScript functions, as highlighted by the error encountered due to incorrect code.']}, {'end': 3169.958, 'start': 2988.787, 'title': 'Rest and spread operators in javascript', 'summary': 'Explains the rest and spread operators in javascript, illustrating how the rest operator packs arguments into an array and the spread operator splits an array into individual values, emphasizing their usage and differences in function arguments and calls.', 'duration': 181.171, 'highlights': ['The rest parameter packs arguments into an array, allowing for the inclusion of different data types. The rest parameter in JavaScript takes a list of arguments, which could be numbers, strings, or mixed values, and packs them together in an array, allowing for the inclusion of different data types.', 'The spread operator splits an array into individual values, facilitating the conversion of an array into a list of arguments for a function call. The spread operator in JavaScript loops through an array and splits it up into individual values, facilitating the conversion of an array into a list of arguments for a function call, serving as the opposite of the rest operator.', 'The usage of rest and spread operators in function arguments and calls is illustrated, emphasizing their respective functionalities and applications. The chapter illustrates the usage of rest and spread operators in function arguments and calls, emphasizing their respective functionalities, such as packing arguments into an array with the rest operator and splitting an array into individual values with the spread operator.']}], 'duration': 371.791, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/IEf1KAcK6A8/pics/IEf1KAcK6A82798167.jpg', 'highlights': ['The rest parameter allows handling a variable number of arguments in a function, converting a list of values into an array for flexible function implementation.', 'The usage of rest and spread operators in function arguments and calls is illustrated, emphasizing their respective functionalities and applications.', 'The rest parameter packs arguments into an array, allowing for the inclusion of different data types.', "Use of the rest parameter is exemplified with the 'sum up' function, displaying its ability to work with both arrays and lists of values, resulting in a concise and adaptable function for adding numbers.", 'The spread operator splits an array into individual values, facilitating the conversion of an array into a list of arguments for a function call.', 'The importance of correct syntax and usage of semicolons in JavaScript functions is emphasized, as demonstrated by the error encountered when the code is not written correctly.']}, {'end': 4408.324, 'segs': [{'end': 3311.76, 'src': 'heatmap', 'start': 3247.823, 'weight': 1, 'content': [{'end': 3255.738, 'text': 'so now i can, for example, simply log test result here, and i saw that i have a typo.', 'start': 3247.823, 'duration': 7.915}, {'end': 3258.6, 'text': "so i'll quickly repair this.", 'start': 3255.738, 'duration': 2.862}, {'end': 3262.563, 'text': 'and if i now hit run, what do you think will happen?', 'start': 3258.6, 'duration': 3.963}, {'end': 3265.246, 'text': 'well, now i get the values printed out.', 'start': 3262.563, 'duration': 2.683}, {'end': 3272.612, 'text': "of course this could have been achieved before with a for loop, but this is a shorter syntax and it's perfect for looping through arrays,", 'start': 3265.246, 'duration': 7.366}, {'end': 3280.924, 'text': "and that is what it's there for to quickly grab the individual elements of an array and do something with them here in this block of the for loop.", 'start': 3272.612, 'duration': 8.312}, {'end': 3283.247, 'text': "So that's the for off loop being added.", 'start': 3281.265, 'duration': 1.982}, {'end': 3285.65, 'text': 'Pretty straightforward, but also pretty useful.', 'start': 3283.307, 'duration': 2.343}, {'end': 3294.337, 'text': 'Another interesting addition to ES6 are template literals.', 'start': 3291.212, 'duration': 3.125}, {'end': 3303.11, 'text': 'Now template literals are basically kind of strings with extra features and I will show that to you.', 'start': 3295.018, 'duration': 8.092}, {'end': 3306.334, 'text': 'So first create a traditional variable here.', 'start': 3303.811, 'duration': 2.523}, {'end': 3311.76, 'text': 'name with the value max, and of course i could print it out.', 'start': 3307.879, 'duration': 3.881}], 'summary': 'Es6 introduces for...of loop and template literals for improved syntax and functionality.', 'duration': 24.789, 'max_score': 3247.823, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/IEf1KAcK6A8/pics/IEf1KAcK6A83247823.jpg'}, {'end': 3413.028, 'src': 'embed', 'start': 3387.501, 'weight': 5, 'content': [{'end': 3396.684, 'text': "So I might write, hello, I'm, and then, Notice also that I don't have to escape here since I use this back tag notation.", 'start': 3387.501, 'duration': 9.183}, {'end': 3403.946, 'text': 'And then I can use the following syntax to print out a variable which is defined outside of this template literal.', 'start': 3397.184, 'duration': 6.762}, {'end': 3405.066, 'text': 'For example, my name.', 'start': 3404.086, 'duration': 0.98}, {'end': 3409.447, 'text': 'I use a dollar sign for this and then curly braces.', 'start': 3405.766, 'duration': 3.681}, {'end': 3413.028, 'text': 'And inside of those curly braces, the name of the variable I want to print.', 'start': 3409.567, 'duration': 3.461}], 'summary': 'Using template literals to print a variable, e.g., name.', 'duration': 25.527, 'max_score': 3387.501, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/IEf1KAcK6A8/pics/IEf1KAcK6A83387501.jpg'}, {'end': 3517.808, 'src': 'embed', 'start': 3489.734, 'weight': 3, 'content': [{'end': 3495.437, 'text': "So, even though that's inside of this template expression, inside of this curly brace block here.", 'start': 3489.734, 'duration': 5.703}, {'end': 3499.699, 'text': 'well, I added, like we used to, with a plus sign and then the string.', 'start': 3495.437, 'duration': 4.262}, {'end': 3507.443, 'text': "So in the end, what we're doing here is between those curly braces, you have to enter something which can be resolved to a string.", 'start': 3500.119, 'duration': 7.324}, {'end': 3511.825, 'text': 'And then you might do whatever you want to do here, run some calculations and so on,', 'start': 3508.043, 'duration': 3.782}, {'end': 3517.808, 'text': "as long as the result of whatever you're doing here inside of the curly braces returns a string.", 'start': 3511.825, 'duration': 5.983}], 'summary': 'Template expressions in curly braces must return a string.', 'duration': 28.074, 'max_score': 3489.734, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/IEf1KAcK6A8/pics/IEf1KAcK6A83489734.jpg'}, {'end': 4241.55, 'src': 'embed', 'start': 4206.833, 'weight': 0, 'content': [{'end': 4208.657, 'text': 'Those names here have to match.', 'start': 4206.833, 'duration': 1.824}, {'end': 4211.042, 'text': 'That is really important to understand.', 'start': 4209.419, 'duration': 1.623}, {'end': 4214.352, 'text': 'Now I explained that names have to match.', 'start': 4212.691, 'duration': 1.661}, {'end': 4219.796, 'text': 'So name has to match name and greet has to match greet in order to successfully deconstruct this object.', 'start': 4214.432, 'duration': 5.364}, {'end': 4227.781, 'text': 'But sometimes you want to have a different name for this variable outside of this object than you are using inside of this object.', 'start': 4220.456, 'duration': 7.325}, {'end': 4234.345, 'text': "That's why when deconstructing objects or destructuring objects, you can use aliases.", 'start': 4228.321, 'duration': 6.024}, {'end': 4241.55, 'text': 'So, for example, I could give greet an alias of hello and then I could rename this function here too.', 'start': 4234.785, 'duration': 6.765}], 'summary': 'Understanding the importance of matching names and using aliases for successful object deconstruction.', 'duration': 34.717, 'max_score': 4206.833, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/IEf1KAcK6A8/pics/IEf1KAcK6A84206833.jpg'}], 'start': 3170.834, 'title': 'Es6 features, destructuring in javascript', 'summary': "Explains es6 features like spread operator, for...of loop, and template literals for array manipulation, simplified looping, and dynamic string creation. it also covers destructuring in javascript, allowing extraction of values from arrays and objects, with examples of swapping values, ignoring certain values, and creating aliases. additionally, it includes other es6 core syntax changes and additions, emphasizing their significance in enhancing javascript's power and flexibility.", 'chapters': [{'end': 3557.823, 'start': 3170.834, 'title': 'Es6 features and their usage', 'summary': 'Explains the usage of es6 features such as the spread operator, for...of loop, and template literals, showcasing their benefits for array manipulation, simplified looping, and dynamic string creation.', 'duration': 386.989, 'highlights': ['ES6 for...of loop usage for array iteration The chapter demonstrates the usage of the ES6 for...of loop to efficiently loop through arrays, providing a more concise syntax compared to traditional for loops.', 'Usage of ES6 template literals for dynamic string creation The chapter explains the usage of ES6 template literals to create dynamic strings, allowing the insertion of variables and multi-line strings, enhancing the readability and flexibility of string manipulation.', 'Introduction of spread operator for array manipulation The chapter briefly mentions the usage of the spread operator in ES6 for splitting arrays into individual values, providing a more efficient way for array manipulation.']}, {'end': 3932.084, 'start': 3563.72, 'title': 'Destructuring in javascript', 'summary': 'Covers the concept of destructuring in javascript, allowing the extraction of values from arrays and objects using a concise syntax, including the ability to assign default values and swap variables, with examples demonstrating the process and its outcomes.', 'duration': 368.364, 'highlights': ['Destructuring allows you to destructure a complex object like an object or an array into simpler ones, providing a shorter syntax for value extraction. Demonstrates how destructuring simplifies value extraction from arrays and objects, offering a concise syntax for the process.', 'Values can be extracted from an array using square brackets for objects and curly braces for objects, with the ability to assign default values and swap variables. Explains the syntax for extracting values from arrays and objects, including the option to assign default values and swap variables.', 'Destructuring allows for the extraction of specific values from an array, with the original array remaining unchanged and persisting. Emphasizes that destructuring enables the extraction of specific array values without altering the original array.']}, {'end': 4408.324, 'start': 3932.544, 'title': 'Destructuring in javascript', 'summary': "Explains the concept of destructuring in javascript, which includes examples of destructuring arrays and objects, demonstrating the ability to swap values, ignore certain values, and create aliases, with emphasis on the differences between array and object destructuring. it also covers other es6 core syntax changes and additions, such as let and const, fat arrow functions, default arguments, literal notation of objects, rest and spread, template literals, and its significance in enhancing javascript's power and flexibility.", 'duration': 475.78, 'highlights': ['The chapter explains the concept of destructuring in JavaScript, which includes examples of destructuring arrays and objects, demonstrating the ability to swap values, ignore certain values, and create aliases. Examples of swapping and ignoring values in arrays, creating aliases in object destructuring.', 'Emphasis on the differences between array and object destructuring, highlighting that for object destructuring, elements are pulled out by their property name, while for array destructuring, they are pulled out by position. Clarification on the difference between array and object destructuring, focusing on the way elements are pulled out.', "Covers other ES6 core syntax changes and additions, such as let and const, fat arrow functions, default arguments, literal notation of objects, rest and spread, and template literals, emphasizing their significance in enhancing JavaScript's power and flexibility. Detailed coverage of ES6 core syntax changes and additions, highlighting their importance in enhancing JavaScript's capabilities."]}], 'duration': 1237.49, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/IEf1KAcK6A8/pics/IEf1KAcK6A83170834.jpg', 'highlights': ["Covers other ES6 core syntax changes and additions, such as let and const, fat arrow functions, default arguments, literal notation of objects, rest and spread, and template literals, emphasizing their significance in enhancing JavaScript's power and flexibility.", 'Destructuring allows for the extraction of specific values from an array, with the original array remaining unchanged and persisting.', 'Introduction of spread operator for array manipulation The chapter briefly mentions the usage of the spread operator in ES6 for splitting arrays into individual values, providing a more efficient way for array manipulation.', 'Usage of ES6 template literals for dynamic string creation The chapter explains the usage of ES6 template literals to create dynamic strings, allowing the insertion of variables and multi-line strings, enhancing the readability and flexibility of string manipulation.', 'ES6 for...of loop usage for array iteration The chapter demonstrates the usage of the ES6 for...of loop to efficiently loop through arrays, providing a more concise syntax compared to traditional for loops.', 'Destructuring allows you to destructure a complex object like an object or an array into simpler ones, providing a shorter syntax for value extraction.']}], 'highlights': ['ES6 is the next-gen version with new features, requiring polyfills or transpilers to run ES6 code in browsers, allowing the use of ES6 features today (e.g., jsbin.com format).', 'The importance of setting up a local ES6 development environment is emphasized, including the need for a compiler, module loader, and a server, with tools like Babel and Webpack being essential.', "The introduction of 'let' and 'const' in ES6 enables block scoping and the creation of constants, offering a different approach to variable declaration compared to 'var', ensuring variables are contained within specific blocks.", 'ES6 introduces a new syntax using fat arrow for writing functions, providing a different way to define functions and allowing for shorter syntax.', 'The arrow function maintains its context without requiring workarounds like bind, apply, or call.', 'ES6 allows assigning default values to function arguments, impacting the behavior of comparisons and function calls.', 'The rest parameter allows handling a variable number of arguments in a function, converting a list of values into an array for flexible function implementation.', "Covers other ES6 core syntax changes and additions, such as let and const, fat arrow functions, default arguments, literal notation of objects, rest and spread, and template literals, emphasizing their significance in enhancing JavaScript's power and flexibility.", 'Destructuring allows for the extraction of specific values from an array, with the original array remaining unchanged and persisting.']}