Not grab group match in Ruby Regex
I am trying to break down the following string:
"@command Text1 @command2 Text2"
in Ruby. I want to开发者_开发技巧 take out "Text1" and "Text2" in an array. To do this I am using the scan method and using this:
text.scan(/@* (.*?)(@|$)/)
However, when run, the script is pulling the @ symbol in the middle as a separate match (presumably because the parenthesis are used in Ruby to indicate what string you want to pull out of the input):
Text1
@
Text2
My question is, how can I pull out Text1 and Text2 bearing in mind the expression needs to stop matching at both "@" and the end of a string?
If you want a non-capturing group use ?:
text.scan(/@* (.*?)(?:@|$)/)
As a sidenote, your regular expression looks like it might contain an error. Perhaps you meant this instead?
text.scan(/@\w+ (\w+)(?= @|$)/)
The difference is that your expression matches on " foo"
, which I guess is not intentional.
text.scan(/@* (.*?)(?:@|$)/)'
In your regex, you don't need the parentheses around '@|$'. The following will accomplish the same thing without the '@' being returned in a separate match group:
text.scan(/@* (.*?)[@\$]/)
Since you're looking only for a single character in that group, the square brackets will match any one character within them.
Here's how I'd do it:
text.scan(/@[^\s]* ([^@]*)/)
How does this regex look? http://rubular.com/regexes/13264
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