Javascript - Lodash / Underscore compare two objects and change values based on their keys

Question

There is a small problem

I need to compare two objects, and based on the same keys in these objects pass values from second object to the original object.

Original object

{
   content: "Old Value",
   height: 200,
   id: "15a2d286-d123-1cf0-4e40-b043b055a49f",
   type: "location",
   units: "some unit value",
   width: 200,
}

Second object

{
   units: "some unit value", 
   content: "New Value"
}

Keys is not necessary to check for compliance

The output will be something like that

{
   content: "New Value", // changed value
   height: 200,
   id: "15a2d286-d123-1cf0-4e40-b043b055a49f",
   type: "location",
   units: "some unit value", // changed value
   width: 200,
}

Is there any elegant solution to this problem with Lodash or Underscore?

What is your comparison based on? The `units` value? – cl3m Mar 14 '16 at 14:58 — cl3m, Mar 14 '16 at 14:58
Seems like you just want to merge two objects? – Felix Kling Mar 14 '16 at 14:59 — Felix Kling, Mar 14 '16 at 14:59

score 0 · Accepted Answer · answered Mar 14 '16 at 15:01

0

this will do the trick (using lodash)

var source = {
  content: "Old Value",
  height: 200,
  id: "15a2d286-d123-1cf0-4e40-b043b055a49f",
  type: "location",
  units: "some unit value",
  width: 200,
},
source2 = {
  units: "some unit value", 
  content: "New Value"
}
_.assignIn(source , source2 );

answered Mar 14 '16 at 15:01

Zamboney

2,002
12
22

if i may ask, what is the difference between _.assignIn and _.merge ? for , _.merge(source,source2) seems to do the same thing ! – semuzaboi Apr 14 '16 at 11:08

Javascript - Lodash / Underscore compare two objects and change values based on their keys

1 Answers1