find and replace property value in json object using javascript/underscore.js

Question

I have one list as follows

var data = [{id:1, name:'user1', img:'img1.jpg' },{id:2, 'user2', img:'img2.jpg' }]

Now I have to replace img property with new value (e.g. 'New_Image_2.jpg') for id=2 using underscore.js or in javascript using less effort. right now I have created one small function as follows.

var imgpath = 'New_Image_2.jpg';
var tmpdata = _.findWhere(data,{id:2});
if (tmpdata) {
    tmpdata.img = imgpath;
}

Now, in above method, my problem is, How to marge new value with original data?

Please execute your program and check. Its already working fine. — thefourtheye
– thefourtheye, Commented Jun 13, 2014 at 14:07
_.findWhere(data,{id:2}); returns the actual object and you are mutating the object. So, the changes are actually made in the object which has img2.jpg — thefourtheye
– thefourtheye, Commented Jun 13, 2014 at 14:08
Here's a Fiddle illustrating what @thefourtheye says jsfiddle.net/dMCx3 Note that data in your question is invalid (missing name: in front of 'user2') — nikoshr
– nikoshr, Commented Jun 13, 2014 at 14:11

a-d · Accepted Answer · 2014-06-13 14:09:15Z

1

Well your code should already work because _.findWhere returns the first object corresponding to your constraint or undefined if it does not exist, it means that modifying tmpdata.img actually modifies the value you want to modify.

answered Jun 13, 2014 at 14:09

a-d

10.9k2 gold badges34 silver badges50 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

find and replace property value in json object using javascript/underscore.js

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related