I made a tiny database with books and trying to get titles, authors and year of book with regex in c# but error occured.
Database looks like this:
Eragon // Christopher Paolini // 2005
The Fellowship of the Ring // J. R. R. Tolkien // 1954
And code:
Regex r = new Regex(@"(?<title>(.*)//" +
@"(?<author>(.*)//" +
@"(?<year>(.*)$");
Error:
parsing "(?<tytul>(.*)//(?<autor>(.*)//(?<rok>(.*)$" - Not enough )'s.
You forget to close all the named capturing groups.
@"(?<tytul>(.*))//(?<autor>(.*))//(?<rok>(.*))$"
^ ^ ^
DEMO
By turning the greedy quantifiers .*
at the first to non-greedy .*?
would avoid backtracking.
@"^(?<tytul>(.*?))//(?<autor>(.*?))//(?<rok>(.*))$"
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