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JS Fundamentals: Objects, Arrays, and Functions

Introduction

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Bonus: Merge Sort

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Objects & Arrays

Exercise: Create an array-like object

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Prompt

Implement push and pop and array-like behavior using an object.

function createArray() {

const storage = {};

return {

length: 0,

push: (value) => { /* TODO */ },

pop: () => { /* TODO */ }

};

}

const myArray = createArray();

myArray.push(11);

console.log(myArray);// myArray looks like {0: 11}

myArray.push(12);

console.log(myArray); // => {0: 11, 1: 12}

myArray.length; // => returns 2

myArray.pop(); // => returns 12

myArray.length; // => returns 1

Copy and paste the starter code above or clone the

Repl.it⁠

below to get started!

Code here

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Solution

The solution is in the solution branch, which can be checked out in the

Repl.it⁠

by selecting the version control tab on the right and then selecting the solution branch from the drop down menu.

If you are having trouble with

repl.it,⁠

the solutions are also available below.

push Solution

pop Solution

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Next 👉
`Functions`⁠

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Exercise: Create an array-like object

Prompt

Code here

Solution

push Solution

pop Solution

Next 👉 Functions⁠

Next 👉
`Functions`⁠