How to set specific property value of all objects in a javascript object array (lodash)

Question

I have following object array:

var arr = [
  {
    id    : \"a1\",
    guid  : \"sdfsfd\",
    ...
    value : \"abc\",
    status: \"active\"
  },
  {
             


        

Answer 1

Indeed, you don't need Lodash, but the question is tagged Lodash, and using Lodash offers some useful defenses that reduces the risk of errors. This solution utilizes _.forEach and _.set

 // _.forEach won't throw errors if arr is not an array...
 _.forEach(arr, function (obj) {
    // _.set won't throw errors if obj is not an object. With more complex objects, if a portion of the path doesn't exist, _.set creates it
     _.set(obj, 'status', 'active');
 });

If you wanted to make it abstract, you could build a Lodash mixin:

_.mixin({
    setProperty: function(arr, key, val) {
        _.forEach(arr, function (obj) {
            _.set(obj, path, val);
        });
    }
});

Then, you could use it exactly as you described:

_.setProperty( arr, 'status', 'active' );