Delete anything other than pattern

Question

Let\'s say this is my text:

this is my text this
is my text this is my text
my text is this

I would like to highlight all text ex

Answer 1

I've implemented Benoit's clever regular expression as a custom :DeleteExcept command in my PatternsOnText plugin. It offers other related commands like :SubstituteExcept or :SubstituteInSearch, too.

OP's example would be

:%DeleteExcept /text/

Comparing that with @Benoit's explicit command (:%s/\(^\|\(text\)\@<=\).\{-}\($\|text\)\@=//g), it's a lot simpler.