Merging two array of objects in node js

Question

Input:

const name = [{id:1, first_name: "Sade", age:"30"}, {id:2, first_name: "Jon", age:"40"}];
const ln = [{last_name: "Smith"}, {last_name: "Doe"}];

Output:

const name = [
  {id:1, first_name: "Sade", last_name: "Smith", age:"30"},
  {id:2, first_name: "Jon", last_name: "Doe", age"40"}
];

Please help me to get this output in nodejs

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– Andrew Hardiman, Commented Jan 14, 2021 at 8:57

Mohammad Usman · Accepted Answer · 2021-01-14 08:46:20Z

1

You can use .map() and Spread Syntax to get the desired output:

const name = [{id:1, first_name: "Sade"}, {id:2, first_name: "Jon"}];
const lname = [{last_name: "Smith"}, {last_name: "Doe"}];

const output = name.map((o, i) => ({...o, ...lname[i]}));

console.log(output);

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answered Jan 14, 2021 at 8:46

Mohammad Usman

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4 Comments

Mohammad Usman Over a year ago

@MathewWade It will work with your new method as well. Try it.

Mathew Wade Over a year ago

but then the ln[] is adding at the end, i want before the age attribute

Mohammad Usman Over a year ago

@MathewWade Order of properties in an object doesn't matter. If you need properties in a specific order, use array then. See this post for more information stackoverflow.com/questions/5525795/…)

Mathew Wade Over a year ago

Is it possible to get output within same array name??

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