CODEWITHSUNDEEP
javascriptarrays
James Powell
James Powell

Reputation: 207

Alternative code for Array.push() function

I've been told not to use push in my coursework, as we are only allowed to use code we have been taught, which I find ridiculous.

I have written over 200 lines of code incorporating the push function multiple times. Is there a simple code alternative to the push function which I can implement for it?

Upvotes: 7

Views: 31366

Answers (3)

SteamFire
SteamFire

Reputation: 407

Nowadays you can use array destructuring:

let theArray = [1, 2, 3, 4, 5];
theArray = [
  ...theArray,
  6,
];
console.log(theArray);

If you want to push several elements, put them at the end of the array. You can even put elements at the beginning of the array:

let theArray = [1, 2, 3, 4, 5];
theArray = [
  -1,
  0,
  ...theArray,
  6,
  7,
  8,
  9,
  10
];
console.log(theArray);

The doc about it:

MDN Destructuring Assignment

Upvotes: 12

Ziki
Ziki

Reputation: 1440

If you need to push element to the next index in the array, use: 

var arr = [];
arr[arr.length] = "something";
//output: arr = ["something"]

If you need to add element in specific index use:

var arr = [];
arr[3] = "something";
//output: arr = [undefined,undefined,undefined,"something"]

Upvotes: 9

Jaromanda X
Jaromanda X

Reputation: 1

The closest equivalent

arr[arr.length] = value;

Upvotes: 5

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