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map keys javascript

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Swetav Savarn answered on January 11, 2022 Popularity 9/10 Helpfulness 1/10

answer map keys javascript

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map keys javascript

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const arr=[1,2,3,40]
const newArr=arr.map((e)=>{
return e;
})

array.map basically returns all the element of the array and store elements in the new
array

Popularity 9/10 Helpfulness 1/10 Language javascript

Source: Grepper

Tags: javascript map

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Contributed on Feb 02 2023

Swetav Savarn

0 Answers Avg Quality 2/10

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javascript map key

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// ["a_1", "b_2", "c_3"]
map.map((key, value) => key + "_" + value);

Popularity 10/10 Helpfulness 4/10 Language javascript

Source: stackoverflow.com

Tags: javascript j

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Contributed on Sep 02 2022

Careful Crossbill

0 Answers Avg Quality 2/10

object keys map in js

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// simple array
const arr = ['a', 'b', 'c'];
console.log(Object.keys(arr)); // console: ['0', '1', '2']

// array-like object
const obj = { 0: 'a', 1: 'b', 2: 'c' };
console.log(Object.keys(obj)); // console: ['0', '1', '2']

// array-like object with random key ordering
const anObj = { 100: 'a', 2: 'b', 7: 'c' };
console.log(Object.keys(anObj)); // console: ['2', '7', '100']

// getFoo is a property which isn't enumerable
const myObj = Object.create({}, {
  getFoo: {
    value: function () { return this.foo; }
  }
});
myObj.foo = 1;
console.log(Object.keys(myObj)); // console: ['foo']

Popularity 10/10 Helpfulness 3/10 Language javascript

Source: developer.mozilla.org

Tags: javascript j

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Contributed on Jan 11 2022

Different Dragonfly

0 Answers Avg Quality 2/10

js map key value

Comment

-1

for (const [key, value] of myMap.entries()) {
  console.log(key, value);
}

Popularity 10/10 Helpfulness 3/10 Language javascript

Source: stackoverflow.com

Tags: javascript j

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Contributed on May 27 2022

Obnoxious Opossum

0 Answers Avg Quality 2/10

map keys javascript

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