JavaScript version
removeFalsy.js
const removeFalsy = (arr) => arr.filter(Boolean);TypeScript version
removeFalsy.ts
const removeFalsy = <T,_>(arr: T[]): T[] => arr.filter(Boolean);Example
example.js
removeFalsy([0, 'a string', '', NaN, true, 5, undefined, 'another string', false]);
// ['a string', true, 5, 'another string']