filter (method)

filter

• filter(_predicate): Opt<T>

• Returns Some with same value if predicate holds, None otherwise.

  Parameters

  • _predicate: ((_) => boolean)

    • • (_): boolean

      • Parameters

        • _: T

        Returns boolean

  Returns Opt<T>

  Example

  opt(1).filter(x => x > 0); // Some(1)
  opt(-1).filter(x => x > 0); // None
  

  See

  • noneIf
  • filter