[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 wish to mutate the same object rather than create a new one.

The following example will delete all 0 or empty values:

const sev = { a: 1, b: 0, c: 3 };
const deleteKeysBy = (obj, predicate) =>
  Object.keys(obj)
    .forEach( (key) => {
      if (predicate(obj[key])) {
        delete(obj[key]);
      }
    });

deleteKeysBy(sev, val => !val);