JuliaArrays/StaticArrays.jl

Provide isless

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#367 opened on Feb 16, 2018

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 (9 comments) (0 reactions) (0 assignees)Julia (839 stars) (154 forks)batch import
featuregood first issue

Description

For tuples there is

(1, 2) < (1, 3) #true

Would it make sense to have it for SVectors as well?

SVector(1, 2) < SVector(1, 3) # ERROR: MethodError: no method matching isless(::SVector{2,Int64}, ::SVector{2,Int64})

My use case is to sort a long Vector of small SVector elements.

Contributor guide

Tech stack
None
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.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
Julia programmingStaticArrays.jl package fundamentals
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60
Research direction
Examine how Julia's tuple comparison works via `isless` and implement a similar method for `SVector` in StaticArrays.jl. Look at existing comparison methods in the repository (e.g., `src/mapreduce.jl` or `src/operators.jl`). The issue suggests mirroring tuple behavior; note that the comparison should be element wise and short circuiting. Check the issue comments for any prior discussion or partial solutions. No open PRs exist, so this is a clean implementation task.
Provide isless · JuliaArrays/StaticArrays.jl#367 | Good First Issue