overwrite object value in javascript

Question

function A(){
   //how to alter persist to false here?
   B(obj.options);
}

function B(options){
   if(options.persist === true){ //do something }
}

I want to alter my nested object value. I can do it with one line, but what if I have many options's object? it's ugly I have to do it obj.options.a, obj.options.b, obj.options.c etc..

please add the data or part of the data as well.

Nina Scholz
– Nina Scholz

2016-12-07 09:56:32 +00:00
Commented Dec 7, 2016 at 9:56 — Nina Scholz
– Nina Scholz, Commented Dec 7, 2016 at 9:56

Faouzi Oudouh · Accepted Answer · 2016-12-07 10:01:54Z

4

Using jQuery extend function:

var object1 = { a: false, b: 1, c: 2 };
var object2 = { a: true, b: 2 };

jQuery.extend(object1 , object2 );

answered Dec 7, 2016 at 10:01

Faouzi Oudouh

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1 Comment

Faouzi Oudouh Over a year ago

Yes, jQuery.extend( [deep ], target, object1 [, objectN ] ) If true, the merge becomes recursive (aka. deep copy).

tmaximini · Accepted Answer · 2017-02-13 11:59:59Z

1

If you don't want to use jQuery you can use Object.assign - it is part of ES6 and supported in most environments if you don't use a transpiler. The signature is quite similar to jQuery.extend:

Object.assign({}, object1, object2, { some: { nested: value }});

Or with ES6 you don't really need object assign, you can also write

const newObj = { ...oldObj, { keyToOverwrite: value }};

edited Feb 13, 2017 at 11:59

answered Dec 8, 2016 at 17:27

tmaximini

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