Module "utils"

ifNeeded

• ifNeeded<T>(cb: () => T): () => T

• Returns a function that will return the value of cb by calling it once, then returning the same value each time after. This is used to compute a value that may be used multiple times, but is expensive to compute if unnecessary.

  Type parameters

  • T

  Parameters

  • cb: () => T

    The function to determine the value of

    • • (): T

      • Returns T

  Returns () => T

  The value returned by cb

  • • (): T

    • Returns T