mail

https://github.com/mikel/mail

Ruby

A Really Ruby Mail Library

Mail::Multibyte::Chars#rindex

Returns the position _needle_ in the string, counting in
codepoints, searching backward from _offset_ or the end of the
string. Returns +nil+ if _needle_ isn't found.

Example:
  'Café périferôl'.mb_chars.rindex('é')   # => 6
  'Café périferôl'.mb_chars.rindex(/\w/u) # => 13

Source | Google | Stack overflow

Edit

git clone [email protected]:mikel/mail.git

cd mail

open lib/mail/multibyte/chars.rb

Contribute

# Make a new branch

git checkout -b -your-name--update-docs-Mail--Multibyte--Chars-rindex-for-pr

# Commit to git

git add lib/mail/multibyte/chars.rbgit commit -m "better docs for Mail::Multibyte::Chars#rindex"

# Open pull request

gem install hub # on a mac you can `brew install hub`

hub fork

git push <your name> -your-name--update-docs-Mail--Multibyte--Chars-rindex-for-pr

hub pull-request

# Celebrate!