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Yangshun Tay 2018-02-11 10:59:10 -08:00
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@ -72,10 +72,10 @@ While there are some existing resources to help front end developers in preparin
* [Explain how `this` works in JavaScript](#explain-how-this-works-in-javascript)
* [Explain how prototypal inheritance works](#explain-how-prototypal-inheritance-works)
* [What do you think of AMD vs CommonJS?](#what-do-you-think-of-amd-vs-commonjs)
* [Explain why the following doesn't work as an IIFE: function foo(){ }();. What needs to be changed to properly make it an IIFE?](#explain-why-the-following-doesnt-work-as-an-iife-function-foo--what-needs-to-be-changed-to-properly-make-it-an-iife)
* [Explain why the following doesn't work as an IIFE: `function foo(){ }();`. What needs to be changed to properly make it an IIFE?](#explain-why-the-following-doesnt-work-as-an-iife-function-foo--what-needs-to-be-changed-to-properly-make-it-an-iife)
* [What's the difference between a variable that is: `null`, `undefined` or undeclared? How would you go about checking for any of these states?](#whats-the-difference-between-a-variable-that-is-null-undefined-or-undeclared-how-would-you-go-about-checking-for-any-of-these-states)
* [What is a closure, and how/why would you use one?](#what-is-a-closure-and-howwhy-would-you-use-one)
* [Can you describe the main difference between a `forEach` loop and a `.map()` loop and why you would pick one versus the other?](#can-you-describe-the-main-difference-between-a-foreach-loop-and-a-map-loop-and-why-you-would-pick-one-versus-the-other)
* [Can you describe the main difference between a `.forEach` loop and a `.map()` loop and why you would pick one versus the other?](#can-you-describe-the-main-difference-between-a-foreach-loop-and-a-map-loop-and-why-you-would-pick-one-versus-the-other)
* [What's a typical use case for anonymous functions?](#whats-a-typical-use-case-for-anonymous-functions)
* [How do you organize your code? (module pattern, classical inheritance?)](#how-do-you-organize-your-code-module-pattern-classical-inheritance)
* [What's the difference between host objects and native objects?](#whats-the-difference-between-host-objects-and-native-objects)
@ -771,9 +771,9 @@ To understand the differences between the two, let's look at what each function
**`forEach`**
- Iterates through the elements in an array.
- Executes a callback for each element.
- Does not return a value.
* Iterates through the elements in an array.
* Executes a callback for each element.
* Does not return a value.
```js
const a = [1, 2, 3];
@ -786,8 +786,8 @@ const doubled = a.forEach((num, index) => {
**`map`**
- Iterates through the elements in an array.
- "Maps" each element to a new element by calling the function on each element, creating a new array as a result.
* Iterates through the elements in an array.
* "Maps" each element to a new element by calling the function on each element, creating a new array as a result.
```js
const a = [1, 2, 3];