Ruby Regex Literal
Ruby has a nice percent string literal for regular expressions, %r. It's like // but allows your regex to contain backslashes without escaping them.
Check it out:
2.1.0 :001 > 'http://google.com'.gsub(/http:\/\/google.com/, 'fine')
=> "fine"
2.1.0 :002 > 'http://google.com'.gsub(%r{http://google.com}, 'better')
=> "better"
As the example implies, this is useful when matching URLs.
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