[ruby-core:114563] [Ruby master Bug#19784] String#delete_prefix! problem
From:
"byroot (Jean Boussier) via ruby-core" <ruby-core@...>
Date:
2023-08-26 09:48:04 UTC
List:
ruby-core #114563
Issue #19784 has been updated by byroot (Jean Boussier).
Note that we have the same issue with `end_with?` and `delete_suffix`.
----------------------------------------
Bug #19784: String#delete_prefix! problem
https://bugs.ruby-lang.org/issues/19784#change-104377
* Author: inversion (Yura Babak)
* Status: Closed
* Priority: Normal
* ruby -v: ruby 3.2.2 (2023-03-30 revision e51014f9c0) [x86_64-linux]
* Backport: 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN
----------------------------------------
Here is the snipped and the question is in the comments:
``` ruby
fp = 'with_BOM_16.txt'
body = File.read(fp).force_encoding('UTF-8')
p body # "\xFF\xFE1\u00001\u0000"
p body.start_with?("\xFF\xFE") # true
body.delete_prefix!("\xFF\xFE") # !!! why doesn't work?
p body # "\xFF\xFE1\u00001\u0000"
p body.start_with?("\xFF\xFE") # true
body[0, 2] = ''
p body # "1\u00001\u0000"
p body.start_with?("\xFF\xFE") # false
```
Works same
on Linux (ruby 3.2.2 (2023-03-30 revision e51014f9c0) [x86_64-linux])
and Windows (ruby 3.2.2 (2023-03-30 revision e51014f9c0) [x64-mingw-ucrt])
--
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