billhorsman/capture.rb

Created April 7, 2014 07:55

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Captured Groups in Regex and Ruby

Raw

	# I didn't know that this test made the captured variable available as local variables.

	if /(?<x>\d+)/ =~ "foo 123 bar"
	puts x
	end

	# => 123

Author

billhorsman commented Apr 7, 2014

Ruby 2.1's Regexp class says:

When named capture groups are used with a literal regexp on the left-hand side of an expression and the =~ operator, the captured text is also assigned to local variables with corresponding names.

That's useful!

Note, this isn't new. It's been around since at least Ruby 1.9.3.

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