It seems SubString works well with standard characters, but not for unicode characters. Below is an example in Julia 1.4.2: julia> SubString("aaaa",1,2) "aa" julia> SubString("αααα",1,2) ERROR: StringIndexError("αααα", 2) Stacktrace: [1] string_index_err(::String, ::Int64) at .\strings\string.jl:…

Julia indexes into strings by code unit, not by character. Take a look at the relevant docs section for how to correctly handle Unicode.

Thanks a lot. I didn’t think of that since variable names with unicode worked for me thus far. But seeing how delicate character encoding can be, it makes complete sense to have a sound basis within Julia to incorporate unicode into strings.

Hello, I regularly stumble into this. There seem to be many String supporting packages, but I didn’t quickly find one that simply provided unicode-point indexing. For now, a quick hack could be (no bounds checking) function substring(s::AbstractString, i::Int, j::Int) chars = collect(c for c i…

Subsetting strings in Julia using character indexing Introduction

Thanks, the macro looks impressive! However I can’t imagine this is the kind of thing a novice Julia user is supposed to conjure up if she wants to substring based on character index rather than byte-in-utf8-encoding index. Are there String implementations that simply work with 32bit Unicode chara…

This blog post is meant to exactly provide the opposite. I do not think any Julia beginner is able to write such code. I made it public so that any Julia beginner can use it (even without understanding the details of it). For UTF32 encoded strings you can use LegacyStrings.jl: julia> using LegacyS…

@davidavdav - see also Consider adding kwargs to chop · Issue #37397 · JuliaLang/julia · GitHub as this suggestion was made to the Julia Core team to improve the situation you describe. Maybe you would have some thoughts to share there. Thank you!

I hope I am not mistaken, but there is this PR by @stevengj that was supposed to address a related question via: using Unicode graphemes("αααα", 1:2) However, this doesn’t seem to work in Julia 1.7.3. From the linked PR, how can we know where/when it is ready to be used? Thank you.

[image] rafael.guerra: From the linked PR, how can we know where/when it is ready to be used? Thank you. Look in the NEWS.md patch in that PR—it’s slated for Julia 1.9. See also this discussion and my answers therein: Substring function?

[image] stevengj: Look in the NEWS.md patch in that PR—it’s slated for Julia 1.9. Thanks for the advice. I went for a look and it wasn’t next door: I had to go to the “Files changed” tab and then search for “1.9” to finally see on line 177: [Graphemes_indexing_PR_MD.news] Is this the right…

SubString doesn't work with unicode

New to Julia

stevengj June 17, 2022, 10:07pm 14

As I commented in the other thread, anyone seeking to index strings this way is probably making a mistake, because Unicode is too complicated for character indexing to be useful.

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SubString doesn't work with unicode

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