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What is the concisest way to create an object from a list of keys, all set to the same value. For example,

const keys = [1, 2, 3, 4]
const value = 0

What is the tersest way to attain the object

{
  “1”: 0,
  “2”: 0,
  “3”: 0,
  “4”: 0
}

What is the concisest way to create an object from a list of keys, all set to the same value. For example,

const keys = [1, 2, 3, 4]
const value = 0

What is the tersest way to attain the object

{
  “1”: 0,
  “2”: 0,
  “3”: 0,
  “4”: 0
}

• javascript

Share Improve this question Follow asked Jun 16, 2020 at 11:00 12527481252748 15.4k3434 gold badges116116 silver badges241241 bronze badges 1

• Does this answer your question? Create object from array – Tschallacka Commented Jun 16, 2020 at 11:09

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3 Answers 3

Sorted by: Reset to default 7

You can use Object.fromEntries

const keys = [1, 2, 3, 4]
const value = 0

const result = Object.fromEntries(keys.map(k => [k, value]))

console.log(result)

Should probably be something among:

const keys = [1, 2, 3 ,4];
const value = 0;

console.log(
  keys.reduce((acc, key) => (acc[key] = value, acc), {})
);

The simplest way I can think of would be to use .reduce();

const keys = [1, 2, 3, 4]
const value = 0

const obj = keys.reduce((carry, item) => {
    carry[item] = value;
    return carry;
}, {});

console.log(obj);

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