- Use Array.prototype.every() to test if all elements in the collection return true based on fn.
- Omit the second argument, fn, to use Boolean as a default.
//#Source https://bit.ly/2neWfJ2 const all = (arr, fn = Boolean) => arr.every(fn); console.log(all([4, 2, 3], x => x > 1)); console.log(all([4, 2, 3], x => x < 1)); console.log(all([1, 2, 3]));
true false true
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