swiftlang/swift

[SR-6867] "Chunking" split

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#49,416 opened on 2018年1月29日

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featuregood first issuestandard libraryswift evolution proposal needed

説明
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.

コントリビューターガイド

技術スタック
swift
領域
backend
Issue 種別
feature
難度新しい貢献者にとっての実装難度です。1 は非常に小さな変更、5 は専門的な作業です。
3
推定時間経験ある貢献者が調査、実装、テスト、pull request 準備にかけるおおよその時間範囲です。
half day
活動状況Issue が今どれだけ取り組みやすいかを示します。新しい、活発、古い、ブロック中、またはメンテナー入力待ちなどです。
stale
明確さ期待される変更、受け入れ条件、次の手順がどれだけ明確かを示します。
clear
前提条件
Understanding of Swift genericsFamiliarity with Sequence and Collection protocolsKnowledge of lazy sequences
初心者向け度初回貢献者にどれだけ取り組みやすいかを 1-100 で推定したスコアです。
40
調査方針
The issue requests adding a chunking method to split collections into subsequences of a given length. The implementation should consider both eager and lazy variants. Relevant files include the standard library's Collection.swift and Sequence.swift in the swift repository. Examine existing split methods for patterns. The discussion in the issue (comment from 2018) suggests exploring lazy collection conformance. The proposal is labeled as 'StarterProposal', indicating it is suitable for newcomers with guidance. No linked PRs exist.