Ruby - Check for a regexp in a file

True/False

File.readlines(text_filename).grep(/myRegexp/).any?

An even better PS1

\[\033[38;5;201m\]\u\[\033[38;5;51m\]@\[\033[38;5;183m\]\h\[\033[1;34m\]:\[\033[1;32m\]\w\[\033[1;31m\]\$\[\033[00m\]

Ruby: Best way to boolean grep for a string contained in a file

File.readlines('./mystuff.txt').grep(/Word123/).any?