Question

I’m getting a warning and an error:

rubytime.rb:18: warning: character class has `[' without escape
rubytime.rb:18: unmatched ): /^(\w+).*\([([\d]+)\+]?(\d\d):(\d\d)\)\s*$/

for this line:

if line =~ /^(\w+).*\([([\d]+)\+]?(\d\d):(\d\d)\)\s*$/

I’ve checked a few times and the parens/brackets seem to line up, though perhaps (having recently done perl) I’m making a false assumption about Regexps in Ruby.

Answer 1

[([\d]+)\+]?

Did you mean…

(([\d]+)\+)?

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Also, [\d] is equivalent to \d, so you could really write it as…

((\d+)\+)?

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If you don’t want the outer group to be a matching group, you can use the non-matching (?: ):

(?:(\d+)\+)?