Useless Ruby Tricks
Ruby is a lovely language, with a lot of convenience functions that make it easy to read and pleasant to type. But over the years, it’s also added some wacky extra bits. Let’s explore the (rightfully) forgotten hallways of Ruby syntax.
% syntax makes it easy to create arrays (
%w(like this)), regexes
%r|match|), strings, and more. For a mostly-complete rundown, see this
page. But did you know that pretty much any punctuation is allowed, not
just parentheses or curly braces? Try it in
> %|something| + %@wicked@ + %%this% + %*way* + %$comes$ "somethingwickedthiswaycomes"
Here’s the real kicker: spaces work as delimiters, too.
> % no + %!way! "noway"
String interpolation without curly braces
The standard way to do string interpolation inside a Ruby string is
Most people don’t know that there’s even another way.
Instance variables, class variables, and globals don’t require the curly braces:
> @foo = "foo" > @@bar = "bar" > "#@foo #@@bar #$VERBOSE" "foo bar false"
Confuse your coworkers today!
Got any more?
Do you have any more silly Ruby tricks? Let me know: @gabebw.