we have both doWithIndex: and withIndexDo:. This PR does *not* try to solve that problem. Instead it just unifies the implementation - doWithIndex: was implemented on HashedCollection, the other not --> implement withIndexDo: on Collection. - implement doWithIndex: just in Collection to forward to #withIndexDo:
we have both doWithIndex: and withIndexDo:. This PR does *not* try to solve that problem. Instead it just unifies the implementation - doWithIndex: was implemented on HashedCollection, the other not --> implement withIndexDo: on Collection. - implement doWithIndex: just in Collection to forward to #withIndexDo: