[ruby-core:77179] [Ruby trunk Feature#12694] Want a String method to remove heading substr

< :前の番号 ^ :番号順リスト > :次の番号 P :前の記事（スレッド移動） N :次の記事（スレッド移動） |<:前のスレッド >|:次のスレッド ^ :返事先 _:自分への返事 >:同じ返事先を持つ記事（前） <:同じ返事先を持つ記事（後） ---:分割してスレッド表示、再表示 | :分割して（縦）スレッド表示、再表示 ~ :スレッドのフレーム消去 .:インデックス ..:インデックスのインデックス

Issue #12694 has been updated by Naotoshi Seo.

Description updated

----------------------------------------
Feature #12694: Want a String method to remove heading substr
https://bugs.ruby-lang.org/issues/12694#change-60393

* Author: Naotoshi Seo
* Status: Open
* Priority: Normal
* Assignee: 
----------------------------------------
I often write codes like:

```ruby
str = 'abcdef'
substr = 'abc'
str[substr.size..-1] if str.start_with?(substr) #=> 'def'
# or
str.sub(/^#{Regexp.escape(substr)}/, '') #=> 'def'
```

I want a short hand which is something like:

```ruby
str = 'abcdef'
substr = 'abc'
str.lstrip(substr) #=> 'def'
```

Having similar argument for `String#rstrip` would be nice for symmetry although we already have `String#chomp(substr)`

My frequent use-case is coming from fluentd. We have `remove_tag_prefix` option to remove a heading substring from a tag. We currently using `String#sub` with a regular expression, but I feel regular expression matching is too much just to remove a heading substring.



-- 
https://bugs.ruby-lang.org/

Unsubscribe: <mailto:ruby-core-request / ruby-lang.org?subject=unsubscribe>
<http://lists.ruby-lang.org/cgi-bin/mailman/options/ruby-core>