Feature #12694
Updated by sonots (Naotoshi Seo) about 8 years ago
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` `String#lstrip` 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.