Created
March 10, 2011 21:08
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Using a back reference in the regular expression definition
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| ruby-1.9.2-p136 > 'asdf asdf--asdf asdf-asdf'.gsub(/( |-)( |-)?/, '_') | |
| => "asdf_asdf_asdf_asdf_asdf" | |
| ruby-1.9.2-p136 > 'asdf asdf--asdf asdf-asdf'.gsub(/( |-)\1?/, '_') | |
| => "asdf_asdf_asdf_asdf_asdf" |
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