Regex get string from string

Question

I have NSString that contain this string :

c&&(b.signature=Rk(c));return ql(a,b)}

The RK can be any two chars.

I try to get the RK from the string with (RegexKitLit):

NSString *functionCode = [dataStr2 stringByMatching:@".signature=(.*?)\(" capture:1L];

and functionCode is always nil.Any idea what wrong?

If you know where the 2 characters you want are, why do you need a regex? — Scott Hunter
– Scott Hunter, Commented Jan 26, 2014 at 14:48
i wrote that it can be Rk and it can be tU or any other two letters — YosiFZ
– YosiFZ, Commented Jan 26, 2014 at 14:49
But since you know WHERE they are, can't you just extract the characters at those positions? — Scott Hunter
– Scott Hunter, Commented Jan 26, 2014 at 14:55

rmaddy · Accepted Answer · 2014-01-26 18:29:51Z

1

Don't bother with regular expressions for this. If the format of the string is always the same then you can simply do:

NSString *dataStr2 = @"c&&(b.signature=Rk(c));return ql(a,b)}";
NSString *functionCode = [dataStr2 substringWithRange:NSMakeRange(16, 2)];

If the string is not quite so fixed then base it on the position of the =.

NSString *dataStr2 = @"c&&(b.signature=Rk(c));return ql(a,b)}";
NSRange equalRange = [dataStr2 rangeOfString:@"="];
NSString *functionCode = [dataStr2 substringWithRange:NSMakeRange(equalRange.location + equalRange.length, 2)];

answered Jan 26, 2014 at 18:29

rmaddy

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