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map in an array

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Ariful Islam Adil(Code Lover) answered on November 25, 2019 Popularity 10/10 Helpfulness 3/10

answer map in an array

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map in an array

Comment

let numbers = [33, 22, 44, 55, 66, 77, 88, 99];
const getNumbers = numbers.map(number => number * 2);
console.log(getNumbers);
//Expected output:
/*[
    66,  44,  88, 110,
   132, 154, 176, 198
 ]
 */

Popularity 10/10 Helpfulness 3/10 Language javascript

Source: Grepper

Tags: javascript map

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Contributed on Sep 11 2021

Ariful Islam Adil(Code Lover)

0 Answers Avg Quality 2/10

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array map javascript

Comment

const array1 = [1, 4, 9, 16];

// pass a function to map
const map1 = array1.map(x => x * 2);

console.log(map1);
// expected output: Array [2, 8, 18, 32]

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Source: Grepper

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Contributed on Nov 25 2019

Calm Cockroach

0 Answers Avg Quality 2/10

array map

Comment

const array1 = [1, 4, 9, 16];

// pass a function to map
const map1 = array1.map(x => x * 2);

console.log(map1);
// expected output: Array [2, 8, 18, 32]

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Source: Grepper

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Contributed on Dec 22 2019

Zealous Zebra

0 Answers Avg Quality 2/10

what is array,map in javscript

Comment

.map() is a JavaScript array method that creates a new array with the results of calling a provided function on every element in the calling array. It does not modify the original array. Here's an example:
let numbers = [1, 2, 3, 4, 5];
let doubledNumbers = numbers.map(number => number * 2);
console.log(doubledNumbers);  // Output: [2, 4, 6, 8, 10]

In this example, the .map() method is used to double each element in the numbers array and returns a new doubledNumbers array with the results.

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Source: Grepper

Tags: javascript j

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Contributed on Jan 30 2023

Hustler

0 Answers Avg Quality 2/10

array map example

Comment

const people = [
  { firstName: 'Brian', lastName: 'Troncone' },
  { firstName: 'Todd', lastName: 'Motto' }
];
const peopleWithFullName = people.map(person => ({
  ...person,
  fullName: `${person.firstName} ${person.lastName}`
}));

// [{ firstName: 'Brian', lastName: 'Troncone', fullName: 'Brian Troncone' }, {firstName: 'Todd', lastName: 'Motto', fullName: 'Todd Motto' }]
console.log(peopleWithFullName);
 
--
 
const people = [
  { firstName: 'Brian', lastName: 'Troncone' },
  { firstName: 'Todd', lastName: 'Motto' }
];
const lastNames = people.map(person => person.lastName);

// [ 'Troncone', 'Motto' ]
console.log(lastNames);

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Contributed on May 10 2023

Quaint Quelea

0 Answers Avg Quality 2/10

array map

Comment

let numbers = [1, 2, 3, 4]
let filteredNumbers = numbers.map(function(_, index) {
  if (index < 3) {
     return num
  }
})
// index goes from 0, so the filterNumbers are 1,2,3 and undefined.
// filteredNumbers is [1, 2, 3, undefined]
// numbers is still [1, 2, 3, 4]

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Source: developer.mozilla.org

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Contributed on Apr 24 2021

Cute Cowfish

0 Answers Avg Quality 2/10

array.map

Comment

var x = [1,2,3,4].map( function(item) {return item * 10;});

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: search.brave.com

Tags: javascript j

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Contributed on Mar 24 2022

Outstanding Otter

0 Answers Avg Quality 2/10

array.map

Comment

let arr = [1,2,3]

/*
  map accepts a callback function, and each value of arr is passed to the 
  callback function. You define the callback function as you would a regular
  function, you're just doing it inside the map function
  
  map applies the code in the callback function to each value of arr, 
  and creates a new array based on your callback functions return values
*/
let mappedArr = arr.map(function(value){
	return value + 1
})

// mappedArr is:
> [2,3,4]

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Source: Grepper

Tags: javascript j

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Contributed on Jan 25 2022

QuietHumility

0 Answers Avg Quality 2/10

array.map js

Comment

The map() method creates a new array populated with the results of calling a provided function on every element in the calling array.

// the array: arr = [1,2,3]
arr.map( item(value), index(where in the array), array(The array on which they run));

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Source: developer.mozilla.org

Tags: javascript j

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Contributed on May 01 2023

Kim Kroll

0 Answers Avg Quality 2/10

array.map js

Comment

Using map to reformat objects in an array

const kvArray = [
  { key: 1, value: 10 },
  { key: 2, value: 20 },
  { key: 3, value: 30 },
];

const reformattedArray = kvArray.map(({ key, value }) => ({ [key]: value }));

console.log(reformattedArray); // [{ 1: 10 }, { 2: 20 }, { 3: 30 }]
console.log(kvArray);
// [
//   { key: 1, value: 10 },
//   { key: 2, value: 20 },
//   { key: 3, value: 30 }
// ]

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: developer.mozilla.org

Tags: javascript j

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Contributed on May 01 2023

Kim Kroll

0 Answers Avg Quality 2/10

map in an array

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