Variable isNonPositiveFiniteNumber`Const`

isNonPositiveFiniteNumber: (a: number) => a is NonPositiveFiniteNumber = is

Type guard that checks if a value is a non-positive finite number.

Returns true only for a finite value — never NaN, Infinity, or -Infinity.

Type Declaration

- (a: number): a is NonPositiveFiniteNumber
- Parameters
  - a: number
  Returns a is NonPositiveFiniteNumber
  true if the value is a non-positive finite number, false otherwise