swiftlang/swift

[SR-6867] "Chunking" split

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#49,416 opened on Jan 29, 2018

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featuregood first issuestandard libraryswift evolution proposal needed

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Description
Previous ID SR-6867
Radar None
Original Reporter @airspeedswift
Type New Feature
Votes 0
Component/s Standard Library
Labels New Feature, StarterProposal
Assignee None
Priority Medium

md5: d78e8d70fcb68ef04d5d9fac882fce1f

Issue Description:

It is possible to split a collection per element, but not by a count i.e. split an array into subsequences of length 3, or more generally any collection into subsequence of length n. There should be a ability to do this lazily for collections and eagerly for sequences.

Contributor guide

Research direction
Examine the Swift standard library's existing methods for splitting collections and implement a 'chunked' method that splits into subsequences of a given length. Consider both lazy and eager variants.
Tech stack
swift
Domain
backend
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
Swift
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
75