Module "ifdef"

Const ifDef

• ifDef<A, B>(f: Fn<A, B>, x: A | null | undefined): undefined | B

• Returns f(x) iff x is not null or undefined.

  Type parameters

  • A

  • B

  Parameters

  • f: Fn<A, B>

    function

  • x: A | null | undefined

    value

  Returns undefined | B