JuliaArrays / JuliaArrays/ArrayViews.jl

Improper View Error

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#37 2 comments 0 reactions 0 assignees View on GitHub

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Dominant language
Julia
Stars
20
Forks
14
PR merge metrics
No merged PRs in 30d

Description

I stumbled upon this behavior today:

julia> a = rand(5)
5-element Array{Float64,1}:
 0.123137
 0.370571
 0.740451
 0.857524
 0.143512

julia> view(a, :, 2)
5-element ArrayViews.ContiguousView{Float64,1,Array{Float64,1}}:
 #undef
 #undef
 #undef
 #undef
 #undef

Should this be an error?

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Reproduce the shown view(a, :, 2) expression and inspect the resulting ArrayViews.ContiguousView values. Read the view implementation and existing tests to determine whether displaying #undef is expected or erroneous; done means the behavior is decided and covered by the package's test suite.

Written by the indexing model from the issue text.

Assessment

Tech stack
julia
Domain
data
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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