[removed] filter() for Objects

Question

ECMAScript 5 has the filter() prototype for Array types, but not Object types, if I understand correctly.

How would I implemen

Answer 1

If you're willing to use underscore or lodash, you can use pick (or its opposite, omit).

Examples from underscore's docs:

_.pick({name: 'moe', age: 50, userid: 'moe1'}, 'name', 'age');
// {name: 'moe', age: 50}

Or with a callback (for lodash, use pickBy):

_.pick({name: 'moe', age: 50, userid: 'moe1'}, function(value, key, object) {
  return _.isNumber(value);
});
// {age: 50}