How to set a lot a class properties from an object with the same property names?

Question

I'm working in JS and I've got the following object with a lot of properties:

var foo = { prop1: 123, prop2: 456, prop3: 789, ... propX: 321 }

I want to set a class with exactly the same properties.

I can do it like that:

this.prop1 = foo.prop1 this.prop2 = foo.prop2 this.prop2 = foo.prop2 ... this.propX = foo.propX

But I'm looking for something like:

for(var property in foo) { this.[property] = foo[property] }

Do you know if it's possible to get this kind of behavior in JS?

I'd like to set my class properties with a single loop for.

Use this[property] instead.

m4ktub
– m4ktub

2015-06-10 15:57:24 +00:00
Commented Jun 10, 2015 at 15:57 — m4ktub
– m4ktub, Commented Jun 10, 2015 at 15:57
@m4ktub I can't believe it was so easy...

Alex
– Alex

2015-06-10 16:04:55 +00:00
Commented Jun 10, 2015 at 16:04 — Alex
– Alex, Commented Jun 10, 2015 at 16:04

Jozef Dúc · Accepted Answer · 2015-06-10 15:57:32Z

Check if this has property and then assign from foo

for(var property in foo) { if(this.hasOwnProperty(property)) { this[property] = foo[property]; } }

or a better way is to loop all keys in this and you do not need if statement.

TaoPR · Accepted Answer · 2015-06-10 16:02:14Z

Iterate through source object property keys and copy values to target objects like this:

var foo = { prop1: 123, prop2: 456, prop3: 789, ... propX: 321 } // Copy properties across var target = {}; var keys = Object.keys(foo); keys.forEach(function(key){ target[key] = foo[key]; });

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