castArrayIfExists

94 bytes

Usage

The castArrayIfExists function ensures that a non-nullish input value is always returned as an array. If the input is already an array, it returns a shallow copy of the array. If the input is not an array, it wraps the input in a new array. Nullish values (null or undefined) are passed through as is.

import * as _ from 'radashi'

_.castArrayIfExists(1) // => [1]
_.castArrayIfExists([1, 2, 3]) // => [1, 2, 3]
_.castArrayIfExists('hello') // => ['hello']
_.castArrayIfExists(null) // => null
_.castArrayIfExists(undefined) // => undefined