Breaking News: Grepper is joining You.com. Read the official announcement!

js map()

Add Answer

ofroog answered on December 22, 2019 Popularity 10/10 Helpfulness 2/10

answer js map()

related javascript map

related map javascript

related javascript map function

related JavaScript Array map()

related map method js

related javascript map

related map javascript

js map()

Comments(1)

var number = [1, 2 , 3, 4, 5, 6, 7, 8, 9]; 
var doubles  = number.map((n) => { return n*2 })

/*  doubles 
    (9) [2, 4, 6, 8, 10, 12, 14, 16, 18] */

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: Grepper

Tags: javascript

Link to this answer
Share Copy Link

Contributed on Feb 08 2022

ofroog

0 Answers Avg Quality 2/10

Closely Related Answers

javascript map

Comment

array.map((item) => {
  return item * 2
} // an example that will map through a a list of items and return a new array with the item multiplied by 2

Popularity 10/10 Helpfulness 3/10 Language javascript

Source: Grepper

Tags: javascript j

Link to this answer
Share Copy Link

Contributed on Dec 22 2019

Zealous Zebra

0 Answers Avg Quality 2/10

javascript map

Comment

const numbers = [0,1,2,3];

console.log(numbers.map((number) => {
  return number;
}));

Popularity 10/10 Helpfulness 3/10 Language javascript

Source: Grepper

Tags: javascript j

Link to this answer
Share Copy Link

Contributed on Oct 04 2020

hateschoollovecoding

0 Answers Avg Quality 2/10

map javascript

Comment

var numbers = [1, 4, 9];
var doubles = numbers.map(function(num) {
  return num * 2;
});
// doubles is now [2, 8, 18]. numbers still [1, 4, 9]

Popularity 10/10 Helpfulness 3/10 Language javascript

Source: developer.mozilla.org

Tags: javascript j

Link to this answer
Share Copy Link

Contributed on Dec 02 2020

Dev Inca

0 Answers Avg Quality 2/10

javascript map function

Comment

/* Answer to: "javascript map function" */

/*
  <Array>.map() - One of the most useful in-built methods in JavaScript (imo).

  The map() method creates a new array populated with the results of calling
  a provided function on every element in the calling array.
 
  For more information, click on the source link.

  Let me make some examples of it's uses:
*/

let array = [1, 4, 9, 16];
array.map(num => num * 2); // [2, 8, 18, 32];
array.map(pounds => `£${pounds}.00`); // ["£1.00", "£4.00", "£9.00", "£16.00"];
array.map(item => Math.sqrt(item)); // [1, 2, 3, 4];

Popularity 10/10 Helpfulness 3/10 Language javascript

Source: developer.mozilla.org

Tags: javascript j

Link to this answer
Share Copy Link

Contributed on Oct 29 2020

TigerYT

0 Answers Avg Quality 2/10

JavaScript Array map()

Comment

const numbers1 = [45, 4, 9, 16, 25];
const numbers2 = numbers1.map(myFunction);

function myFunction(value, index, array) {
  return value * 2;
}

Popularity 10/10 Helpfulness 3/10 Language javascript

Source: Grepper

Tags: javascript j

Link to this answer
Share Copy Link

Contributed on May 22 2022

naly moslih

0 Answers Avg Quality 2/10

map method js

Comment

// Map objects are collections of key-value pairs. 
// A key in the Map may only occur once, it is unique in the Map 's collection
let map = new Map()
let keyArray = 'Array'
map.set(keyArray, [1, 2, 3, 4, 5])
map.get(keyArray) // 1, 2, 3, 4, 5

Popularity 10/10 Helpfulness 3/10 Language javascript

Source: Grepper

Tags: javascript j

Link to this answer
Share Copy Link

Contributed on Jul 29 2022

Agreeable Ape

0 Answers Avg Quality 2/10

javascript map

Comment

// make new array from edited items of another array
var newArray = unchangedArray.map(function(item, index){
  return item;	// do something to returned item
});

// same in ES6 style (IE not supported)
var newArray2 = unchangedArray.map((item, index) => item);

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: Grepper

Tags: javascript j

Link to this answer
Share Copy Link

Contributed on Feb 18 2021

TechNyquist

0 Answers Avg Quality 2/10

javascript map

Comment

const numbers = [2, 4, 6, 8];
const result = numbers.map(a => a * 2);
console.log(result);
//Output: [ 4, 8, 12, 16 ]

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: Grepper

Tags: javascript j

Link to this answer
Share Copy Link

Contributed on Jan 03 2022

Ariful Islam Adil(Code Lover)

0 Answers Avg Quality 2/10

javascript map

Comment

const items = [1, 2, 3, 4, 5, 6, 7, 8, 9];

const anotherItems = items.map(item => item * 2);

console.log(anotherItems);

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: js.zonayed.me

Tags: javascript j

Link to this answer
Share Copy Link

Contributed on Apr 14 2022

Azizul7m

0 Answers Avg Quality 2/10

map javascript

Comment

//forEach vs. Map High Order Array Methods
const arr = [1,2,3]
const arr2 = [...arr,4,5]//see spread operator grepper answer for [...arr]
//the forEach doesn't return anything, it just loops through the array
arr2.forEach(function(item) {
  console.log(item + ' of ' + arr2.length)
})
//map allows us to return an array and store it into a new array
const arr3 = arr2.map(function(item) {
  //after performing some operation on all the objects of the array
  //we can then return all those values into a new array
  return item * 2
})

console.log(arr3)

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: developer.mozilla.org

Tags: javascript j

Link to this answer
Share Copy Link

Contributed on Oct 10 2022

Jeremy L

0 Answers Avg Quality 2/10

js map()

Contents

More Related Answers

js map()

Closely Related Answers

javascript map

javascript map

map javascript

javascript map function

JavaScript Array map()

map method js

javascript map

javascript map

javascript map

map javascript

Grepper

Documentation

Social

Legal

Contact

Oops, You will need to install Grepper and log-in to perform this action.