From: shugo@... Date: 2017-01-06T16:24:58+00:00 Subject: [ruby-core:78997] [Ruby trunk Bug#13110] Byte-based operations for String Issue #13110 has been updated by Shugo Maeda. Let me share my use case. I'm implementing a text editor, in which the point of a buffer is represented by a byte-based offset for speed. We can get substrings of a buffer by byteslice, but we need force_encoding(Encoding::ASCII_8BIT) to change the contents of a buffer because we don't have bytesplice: https://github.com/shugo/textbringer/blob/d69d4daddc268a95b1a51dbe397bff8fc2d587f9/lib/textbringer/buffer.rb#L32 https://github.com/shugo/textbringer/blob/d69d4daddc268a95b1a51dbe397bff8fc2d587f9/lib/textbringer/buffer.rb#L135 We also need force_encoding(Encoding::ASCII_8BIT) for text search: https://github.com/shugo/textbringer/blob/d69d4daddc268a95b1a51dbe397bff8fc2d587f9/lib/textbringer/buffer.rb#L472 In this case, searching by a regular expression like /[���������������]/ fails. String#bytesplice, String#byteindex, and MatchData#byteoffset are useful for these purposes. ---------------------------------------- Bug #13110: Byte-based operations for String https://bugs.ruby-lang.org/issues/13110#change-62407 * Author: Shugo Maeda * Status: Open * Priority: Normal * Assignee: * Target version: * ruby -v: * Backport: 2.2: UNKNOWN, 2.3: UNKNOWN, 2.4: UNKNOWN ---------------------------------------- How about to add byte-based operations for String? ``` s = "���������������������������" p s.byteindex(/������/, 4) #=> 18 x, y = Regexp.last_match.byteoffset(0) #=> [18, 24] s.bytesplice(x...y, "���������") p s #=> "������������������������������" ``` ---Files-------------------------------- byteindex.diff (2.83 KB) -- https://bugs.ruby-lang.org/ Unsubscribe: