JavaScript - II

Task 1: Set Up The Project With Git

• Fork the project into your GitHub user account
• Clone the forked project into a directory on your machine
• Use console.log() statements to check your work.

Task 2: Callbacks

This task focuses on getting practice with callback functions by giving you an array of values and instructions on what to do with that array.

• Write out each function using the ES5 function keyword syntax.
• Challenge 1
• Challenge 2
• Challenge 3
• Challenge 4
• Challenge 5
• Stretch

Task 3: Array Methods

Use .forEach(), .map(), .filter(), and .reduce() to loop over an array with 50 objects in it. The array-methods.js file contains several challenges built around a fundraising 5K fun run event.

• Challenge 1
• Challenge 2
• Challenge 3
• Challenge 4
• Challenge 5

Task 4: Closures

We have learned that closures allow us to access values in scope that have already been invoked.

Hint: Utilize debugger statements in your code in combination with your developer tools to easily identify closure values.

• Challenge 1
• Challenge 2
• Stretch

Stretch Goals

Arrow Function Syntax

• Challenge 1
• Challenge 2
• Challenge 3
• Challenge 4
• Challenge 5
• Look up what an IIFE is in JavaScript and experiment with them

Hey!

Good job completing the challenges! My feedback is below:

• In callbacks.js, remember that the pop method is invoked this way .pop(). Also, is there a way you can access the last array element without modifying the array? (hint: look at your code on line 18 of callbacks.js
• In 'callbacks.js`, in your sumNums function on line 32, you need to add x and y and pass the sum to the callback function.
• In 'callbacks.js`, in your multiplyNums function on line 39, you need to multiply x and y and pass the product to the callback function.
• Look at a few closure examples here: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Closures and modify your functions in closure.js. It might help to use function keyword syntax instead of arrow syntax.
• You did a great job using .map(), .filter(), and .forEach() in your array-methods.js assignment! If you have time, work on challenge 5 from that file.

Let me know if you have any questions!