class ref ArrayKeys[A: A, B: Array[A] #read] is Iterator[USize val] ref
new ref create( array: B) : ArrayKeys[A, B] ref^
fun box has_next() : Bool val
fun ref next() : USize val
© 2016-2018, The Pony Developers
© 2014-2015, Causality Ltd.
Licensed under the BSD 2-Clause License.
https://stdlib.ponylang.io/builtin-ArrayKeys