Replace array values with another key value using javascript

Question

I want to replace array2 available key with object1 values using javascript.

I have a solution but it's using foreach loop, is there any way without using foreach loop

let object1 = {
   'key1': 'key1 value',
   'key2': 'key2 value',
   'key3': 'key3 value',
   'key4': 'key4 value',
};
let array2 = [key1, key4]

Expected output

let array2 = ['key1 value', 'key2 value']

btw array1 is a object and not a array!

Manas Khandelwal
– Manas Khandelwal

2021-03-30 11:32:49 +00:00
Commented Mar 30, 2021 at 11:32 — Manas Khandelwal
– Manas Khandelwal, Commented Mar 30, 2021 at 11:32
let array2 = [array1["key1"], array1["key2"]]

mathiasfk
– mathiasfk

2021-03-30 11:35:00 +00:00
Commented Mar 30, 2021 at 11:35 — mathiasfk
– mathiasfk, Commented Mar 30, 2021 at 11:35

Ankita Kuchhadiya · Accepted Answer · 2021-03-30 11:55:28Z

2

You can use Array.map (or even forEach) to loop over to array2 and then find the values for the object1 object:

let object1 = {
   'key1': 'key1 value',
   'key2': 'key2 value',
   'key3': 'key3 value',
   'key4': 'key4 value',
};
let array2 = ['key1', 'key4']

const res = array2.map(item => object1[item]);
console.log(res);

edited Mar 30, 2021 at 11:55

answered Mar 30, 2021 at 11:35

Ankita Kuchhadiya

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Comments

Nguyễn Văn Phong · Accepted Answer · 2021-04-19 09:07:14Z

0

Using `Array#reduce`

let object1 = {'key1':'key1 value','key2':'key2 value','key3':'key3 value','key4':'key4 value'};
let array2 = ['key1', 'key4']

console.log(array2.reduce((result, key) => (result.push(object1[key]), result), []));

Using `Array#map`

let object1 = {'key1':'key1 value','key2':'key2 value','key3':'key3 value','key4':'key4 value'};
let array2 = ['key1', 'key4']

console.log(array2.map(key => object1[key]));

Using `spread ...`

let object1 = {'key1':'key1 value','key2':'key2 value','key3':'key3 value','key4':'key4 value'};
let array2 = ['key1', 'key4']

console.log([...[object1[array2[0]]], ...[object1[array2[1]]]]);

answered Apr 19, 2021 at 9:07

Nguyễn Văn Phong

14.2k19 gold badges47 silver badges65 bronze badges

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Replace array values with another key value using javascript

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