rails - :joins sanitizing/substitution...

In VIM, is it possible to use the selected text in the substitute clause without retyping it?...

How can I preserve whitespace when I match and replace several words in Perl?...

command substitution but without breaking output into multiple arguments...

Convert Pascal-cased setter to an underscore-separated variable name...

How can I replace all the text before the match in a Perl substitution?...

Vim substitution of a list of words with another same length list of words?...

Enumerate substitutions with sed or awk...

How can I substitute regexp matches and map the substitutions in Perl?...

What does the Perl substitution operator act on?...