Omit by function?

Lodash has a neat way to remove all null and undefined keys from an obj: _.omit(obj, v => v == null). Currently omit() only accepts strings - can y’all make it optionally take a function parameter?

[Bradcomp]

R.filter and R.reject will work on objects in the way you envision they would: https://goo.gl/Od3t5g

const o = {a: null, b: 'yo', c: 'hello there', d: 12}

filter(is(String), o)  //{"b": "yo", "c": "hello there"}
reject(isNil, o)       //{"b": "yo", "c": "hello there", "d": 12}

[phhu]

See also omitBy function in ramda adjunct: https://char0n.github.io/ramda-adjunct/2.26.0/RA.html#.omitBy

const isLowerCase = (val, key) => key.toLowerCase() === key;
RA.omitBy(isLowerCase, {a: 1, b: 2, A: 3, B: 4}); //=> {A: 3, B: 4}