Variable isNegativeFiniteNumber`Const`

isNegativeFiniteNumber: (a: number) => a is NegativeFiniteNumber = is

Type guard that checks if a value is a negative finite number.

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

Type Declaration

- (a: number): a is NegativeFiniteNumber
- Parameters
  - a: number
  Returns a is NegativeFiniteNumber
  true if the value is a negative finite number, false otherwise