From: duerst@... Date: 2018-11-19T04:59:14+00:00 Subject: [ruby-core:89866] [Ruby trunk Feature#12698] Method to delete a substring by regex match Issue #12698 has been updated by duerst (Martin D��rst). matz (Yukihiro Matsumoto) wrote: > I don't think it's worth adding which is easily done by `sub/gsub`. If put this way, it's easy to agree. But looking at it starting from `String#delete`, it feels annoying that `String#delete` doesn't accept a regular expression. If the above argument were taken to its full conclusion, it would mean that we could depreciate `String#delete`, because `str.delete chars` can be easily rewritten as `str.gsub /[chars]/, ''`. `String#count` is a quite similar case, and even stronger, because in that case, it's not easy to replace it by `sub/gsub`. See feature #13890. The only other method on `String` that has a list of characters as an argument is `String#tr`. For that, I don't see how to add a regular expression as a parameter. ---------------------------------------- Feature #12698: Method to delete a substring by regex match https://bugs.ruby-lang.org/issues/12698#change-74927 * Author: sawa (Tsuyoshi Sawada) * Status: Feedback * Priority: Normal * Assignee: * Target version: ---------------------------------------- There is frequent need to delete a substring from a string. There already are methods `String#delete` and `String#delete!`, but their feature is a little bit different from the use cases that I am mentioning here. I request methods that take a string or a regexp as an argument, and delete the matches from the receiver string. I am not sure of the method name, and I will use the term `remove` here. It can be named in some other better way. I request all combinations of global vs. local, and non-destructive vs. destructive. The expected feature is something like the following. First, the non-destructive ones: ```ruby "abcabc".remove("c") # => "ababc" "abcabc".remove(/\zc/) # => "abcab" "abcabc".gremove("c") # => "abab" "abcabc".gremove(/c/) # => "abab" ``` Then, the destructive ones: ```ruby s = "abcabc" s.remove!("c") # => "ababc" s # => "ababc" s = "abcabc" s.gremove!("d") # => nil s # => "abcabc" ``` Using this, cases like https://bugs.ruby-lang.org/issues/12694 would be just special cases. They can be handled like this: ```ruby "abcdef".remove(/\Aabc/) # => "def" -- https://bugs.ruby-lang.org/ Unsubscribe: