How to get a subset of a javascript object's properties

Question

Say I have an object:

elmo = { 
  color: \'red\',
  annoying: true,
  height: \'unknown\',
  meta: { one: \'1\', two: \'2\'}
};

I want to m

Answer 1

You can use Lodash also.

var subset = _.pick(elmo ,'color', 'height');

Complementing, let's say you have an array of "elmo"s :

elmos = [{ 
      color: 'red',
      annoying: true,
      height: 'unknown',
      meta: { one: '1', two: '2'}
    },{ 
      color: 'blue',
      annoying: true,
      height: 'known',
      meta: { one: '1', two: '2'}
    },{ 
      color: 'yellow',
      annoying: false,
      height: 'unknown',
      meta: { one: '1', two: '2'}
    }
];

If you want the same behavior, using lodash, you would just:

var subsets = _.map(elmos, function(elm) { return _.pick(elm, 'color', 'height'); });