Ruby Literals Percent Notation

by | Jul 8, 2017 | Uncategorized | 0 comments

A quick reference to format literals.

%q[ ] Non-interpolated String (except for \\ \[ and \])
%Q[ ] Interpolated String (default)
%r[ ] Interpolated Regexp (flags can appear after the closing delimiter)
%i[ ] Non-interpolated Array of symbols, separated by whitespace (after Ruby 2.0)
%I[ ] Interpolated Array of symbols, separated by whitespace (after Ruby 2.0)
%w[ ] Non-interpolated Array of words, separated by whitespace
%W[ ] Interpolated Array of words, separated by whitespace
%x[ ] Interpolated shell command
%s[ ] Non-interpolated symbol

Note that you can use other characters in place of the [] if you are so inclined.  Ex:

%w(foo bar)

returns [“foo”, “bar”]