JavaScript, Array · Oct 18, 2020
Checks if the provided predicate function returns true for all elements in a collection.
Array.prototype.every() to test if all elements in the collection return true based on fn.fn, to use Boolean as a default.const all = (arr, fn = Boolean) => arr.every(fn);all([4, 2, 3], x => x > 1); // true
all([1, 2, 3]); // true
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Collection · 12 snippets
Checks if the provided predicate function returns true for at least one element in a collection.
JavaScript, Array · Oct 18, 2020
Checks if the provided predicate function returns false for all elements in a collection.
JavaScript, Array · Oct 21, 2020
Checks if all elements in an array are unique, based on the provided mapping function.
JavaScript, Array · Jan 7, 2021