Using JavaScript for combining two arrays into one object's array

Question

Given arrays name ['a','b','c'] data [1 , 2 , 3]

I want the result [{name: 'a', data: 1}, {name: 'b', data: 2}, {name: 'c', data: 3}],

I could do

 let combinedData = [];
 for (let i = 0; i < data.length; i++) {
     combinedData.push({name: name[i], data: data[i]});
 }

but I am looking for an elegant way, shot. (Using external lib is acceptable e.g. lodash)

rgthree · Accepted Answer · 2017-06-25 22:23:44Z

2

You can use Array.map:

let name = ['a','b','c'];
let data = [1,2,3];
let combined = name.map((v, i) => ({name: v, data: data[i]}));
console.log(combined);

answered Jun 25, 2017 at 22:23

rgthree

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Comments

Shane · Accepted Answer · 2017-06-25 22:30:46Z

1

A simple es6 solution could be:

let arr1 = ...;
let arr2 = ...;

let data = arr1.map((item, i) => ({a: item, b: arr2[i]}));

edited Jun 25, 2017 at 22:30

answered Jun 25, 2017 at 22:23

Shane

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2 Comments

rgthree Over a year ago

That's not a valid arrow function resulting in a SyntaxError.

Shane Over a year ago

Yes, you're right. I've missed the parentheses around the object.

Osama · Accepted Answer · 2017-06-25 22:35:10Z

1

let combinedData ={};
  let name = ['a','b','c'];
    let data = [1 , 2 , 3];
 for (let i = 0; i < data.length; i++) {
     combinedData[name[i]]=data[i];
 }
 console.log(combinedData);

answered Jun 25, 2017 at 22:35

Osama

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1 Comment

barha Over a year ago

I was looking for "[{name: 'a', data: 1}, {name: 'b', data: 2}, {name: 'c', data: 3}]", not {a: 1, b: 2, c: 3}, thanks anyways :)

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