CODEWITHSUNDEEP
javascript
Koppoto
Koppoto

Reputation: 43

Create an object based on other object

Say I have an object:

var obj1 = {var1: 123, var2: 456, var3: "fdsfdsfds"};

How can I create object 2 based on obj1 so that it has all the properties of obj1 and they all belong to other new key:

var obj2 = {parentKey: {var1: 123, var2: 456, var3: "fdsfdsfds"}};

The names of the keys -- var1, var2, var3 -- aren't known and they can be anything.

Upvotes: 0

Views: 74

Answers (2)

Hajji Tarik
Hajji Tarik

Reputation: 1082

In fact it is you is not using compiler like babel or other, it is necessary to use the following syntax:

var obj2 = {parentKey: Object.assign ({}, obj1)};

If you do not want your object to be immutable, you just have to do:

var obj2 = {parentKey: obj1};

Waiting for the standardization of ES2015, you must use a compiler to use this syntax:

const obj1 = {var1: 123, var2: 456, var3: "fdsfdsfds"};
const obj2 = {... obj1};

Upvotes: 1

T.J. Crowder
T.J. Crowder

Reputation: 1074305

If you really need to copy the object, a simple way to do a simple-minded copy is the new Object.assign function (which can be shimmed for older environments);

var obj2 = {parentKey: Object.assign({}, obj1)};

If you don't mind using the same object (not a copy), you can just make it the value of the new object's parentKey:

var obj2 = {parentKey: obj1};

Upvotes: 1

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