is-non-nullable

Just function to predicate non nullable with type guard.

Install

$ npm install is-non-nullable

Usage

import isNonNullable from 'is-non-nullable'

isNonNullable('foo')
//=> true

isNonNullable('')
//=> true

isNonNullable(0)
//=> true

isNonNullable(false)
//=> true

isNonNullable(null)
//=> false

isNonNullable(undefined)
//=> false

Type narrowing with Array.filter

const items: (number | null | undefined)[] = [0, 1, null, undefined, 2]

const filtered = items.filter(isNonNullable)
//=> number[]