Idiomatic regex group capturing in Groovy

regex-capture.groovy

// Using Matcher object returned by =~ operator
matcher = "Hello world v1.01" =~ /.* v(\S*)/
if (matcher.matches()) version = matcher[0][1]
assert version == "1.01"

// We can make this a little tidier using the 'with' method
version = ("Hello world v1.01" =~ /.* v(\S*)/).with { matches() ? it[0][1] : null }
assert version == "1.01"

Thanks for Line 7!

Thanks @EwanDawson
I changed a bit but it also works
version = ("Hello world v1.01" =~ /.* v(\S*)/).with { hasGroup() ? it[0][1] : null }

Thanks for https://gist.github.com/EwanDawson/2407215#file-regex-capture-groovy-L7 as well!

Brilliantly executed!!