Ruby regex capture named matches as local variables.

gistfile1.txt

# You can name your captured matches and ruby will create local variables for you automatically.  
# The regex is on Rubular at http://rubular.com/r/HJbhamKAib

$ irb

1.9.3p0 :001 > s = "Foo Bar Bas <foo@bar.com>"
"Foo Bar Bas <foo@bar.com>"

1.9.3p0 :002 > /(?<label>.*) <(?<email>[^>]*)/ =~ s
0

1.9.3p0 :003 > label
"Foo Bar Bas"

1.9.3p0 :004 > email
"foo@bar.com"

Note that this does not work if you switch the order of the regexp and the string. You will still get a match, but the local variables will not be created. Good tip anyway.