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play.api.libs

Collections

object Collections

Utilities functions for Collections

Source
Collections.scala
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Deprecated Value Members

  1. def unfoldLeft[A, B](seed: B)(f: (B) => Option[(B, A)]): Seq[A]

    Produces a Seq from a seed and a function.

    Produces a Seq from a seed and a function.

    Example, produces a List from 100 to 0.

    unfoldLeft(0) {
  case a if a > 100 => None
  case a => Some((a + 1, a))
}
    A

    Type of the final List elements.

    B

    Seed type

    seed

    Initial value.

    f

    Function producing the List elements.

    Annotations
    @deprecated
    Deprecated

    (Since version 2.9.0) use Seq.unfold