Gál Tamás (Dec 11 2023 at 07:58): Gál Tamás (Dec 11 2023 at 07:58):I am quote new in Roc and probably it is a silly question but I was reading the tutorial and I have not found a substring/slice solution in the Str module. How can I get out a substring from a string? Thanks.
Luke Boswell (Dec 11 2023 at 08:28):The reason it isn't in the builtins is because working with unicode strings can be complicated. The plan is for text segmentation to be provided by a library that is currently a WIP over at roc-lang/unicode. Is there a particular use case or thing you were trying to do? There may be another way to achieve what you need
Luke Boswell (Dec 11 2023 at 08:31):I also use Str.split pretty frequently
Gál Tamás (Dec 11 2023 at 08:36):Thanks. I see. I was just thinking of different string manipulations like in other languages to process a given string, Sometimes I don't have a special character to use in split. Eg. I store some information in a string in a specific position and I need to get it out. It is ansii text , not unicode.
Gál Tamás (Dec 11 2023 at 08:51):For a unicode text maybe it can be solved with the Str.walkUtf8WithIndex to get out from the given position
Isaac Van Doren (Dec 11 2023 at 15:03):You can also do Str.toUtf8 followed by List.sublist if your use case allows it
Last updated: Jul 26 2025 at 12:14 UTC