ZipMap method extension on a collection/sequence

[torquato]

There have been related pitches and discussions before. Perhaps you first look into these…

Add Various Zip-Related Types and Operations

Add Various Zip-Related Types and Operations Proposal: SE-NNNN Authors: Dennis Vennink Review Manager: To be determined Implementation: dennisvennink/bdf3c52ae1d9a3750ec3507ab3262921 Previous Discussions: 1, 2, 3 Status: Awaiting implementation Introduction This proposal adds various zip-related types and operations to the standard library. Motivation In functional programming, zip and unzip are irreplaceable operations. zip maps an n-tuple of sequences to a sequence of n-tuples. It e…

Add a padded version of zip to complement the current zip

(Spun off from SE-0203 — Rename Sequence.elementsEqual - #69 by Ben_Cohen) The way that zip(_:_:) works currently is to take pairs of elements from its two Sequence parameters (until one of these runs out) and provide a new Sequence that provides these pairs as a tuple. Unfortunately, sometimes this isn't quite what we need: it's be great to have an operation that went through all of the elements in both Sequences, padding the shorter Sequence so that it matches the length of the longer one. I'…