lib Update Request

Configuration Check

My compilation target is ES2015 and my lib is the default.

Missing / Incorrect Definition

I would love to add an overload to Array.filter which takes in a common use case of passing a Boolean directly to .filter. This would offer a simple, intuitive workaround for a common pain point with .filter.

This could be achieved via an overload adding BooleanConstructor, and a type predicate.

https://www.typescriptlang.org/play?#code/PTAEHUEsBcAtTgU1AewG6IE4BsUEMATAWACgBjFAOwGdpQ9NNQBeUAbQCIBGDgGlACulAogBmkSogIBdANykQoJaAB6AflKkJ0LKLxlkAQUZ4AngB4AKgD5QAb1JLx2HZgAUAB0xTIZPDoAuUAAhFBRsRDxKAGEqWkwBMmgUTABKIIA5KgAxPGxqCxs2OVIAX00SaFMPZCzKXPzC21ZLUEQADx1halAABlAAH1AAcmHB0EoBbGxxoRFxSQJQNQnEDCYgy3kSUgoaOmdXKWMmVgZMADpDrDdQ8MjKVO3FZXUgA

Sample Code

const arr = ['1', undefined];

const filteredArr = arr.filter(Boolean);

filteredArr should be string[], not (string | undefined)[].