How to compare two objects and return an object that differs

Question

How to compare two objects and return an object that differs.

Elements that differ are overwritten by the secondObject.

I want to use EcmaScript6

const firtObject = {a:"abc", b:"bcd", c:"cde"}
const secondObject = {b:"fff", c:"cde"}

const returnObject= {a:"abc", b:"fff", c:"cde"}

`Object.assign({}, firstObject, secondObject)` and fix the typo — CertainPerformance, May 16 '19 at 08:05
Using spread operator: `console.log({...firstObject, ...secondObject})` — Artem Mirchenko, May 16 '19 at 08:05

score 0 · Accepted Answer · answered May 16 '19 at 08:04

0

Use simple spreading:

const firstObject = {a:"abc", b:"bcd", c:"cde"}
const secondObject = {b:"fff", c:"cde"};
const returnObject = { ...firstObject, ...secondObject };
console.log(returnObject);

.as-console-wrapper { max-height: 100% !important; top: auto; }

You could also use Object.assign:

const firstObject = {a:"abc", b:"bcd", c:"cde"}
const secondObject = {b:"fff", c:"cde"};
const returnObject = Object.assign({}, firstObject, secondObject);
console.log(returnObject);

.as-console-wrapper { max-height: 100% !important; top: auto; }

answered May 16 '19 at 08:04

Jack Bashford

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No problem @benxmario, if my answer fixed your problem please mark it as accepted. – Jack Bashford May 16 '19 at 08:20
I have one more question, how to return an object that has been overwritten? returnObject = {b:"fff"} – benxmario May 16 '19 at 08:26

How to compare two objects and return an object that differs

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