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mdn js map

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Nasty Newt answered on June 15, 2020 Popularity 9/10 Helpfulness 1/10

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mdn js map

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const wrongMap = new Map();
wrongMap['bla'] = 'blaa';
wrongMap['bla2'] = 'blaaa2';

console.log(wrongMap); // Map { bla: 'blaa', bla2: 'blaaa2' }

Popularity 9/10 Helpfulness 1/10 Language javascript

Source: developer.mozilla.org

Tags: javascript map

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Contributed on Mar 16 2023

Nasty Newt

0 Answers Avg Quality 2/10

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Comments(1)

let new_array = arr.map(function callback( currentValue[, index[, array]]) {
    // return element for new_array
}[, thisArg])

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: developer.mozilla.org

Tags: javascript j

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Contributed on Jun 15 2020

Bad Bison

0 Answers Avg Quality 2/10

map method js

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// 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 2/10 Language javascript

Source: Grepper

Tags: javascript j

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Contributed on Jul 29 2022

Agreeable Ape

0 Answers Avg Quality 2/10

mdn .map

Comment

const numbers = [1, 5, 10, 15];
const doubles = numbers.map(function(x) {
   return x * 2;
});
// doubles is now [2, 10, 20, 30]
// numbers is still [1, 5, 10, 15]

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: developer.mozilla.org

Tags: javascript j

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Contributed on Oct 09 2021

Dizzy Dog

0 Answers Avg Quality 2/10

javascript map mdn

Comment

myRange = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11]
//understanding map power is similar to forEach, but concise
//creating objects
const newRange = myRange.map((d) =>({num : d * 5, tuo : d * 50}));

//creating updated ranges
const newRange = myRange.map((d) =>d * 5);

Popularity 10/10 Helpfulness 1/10 Language javascript

Source: Grepper

Tags: javascript j

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Contributed on Jul 09 2022

M M Kamalraj

0 Answers Avg Quality 2/10

mdn js map

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