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Posted by Rik on 10/09/68 11:56
FFMG wrote:
> Hi,
>
> I am looking for a word inside a bracket, the text is something like.
> LINE1( A=10) some more text
> LINE2( B=12) yet some more text
> LINE3( A=13) and some more text
> LINE4( B=14) and some more text
>
> If I am looking for the value of 'A' in LINE1 then I would probably
> do something like
> /LINE1.*?\(.*?A=([^\)]).*?)/is
>
> But if I am looking for a value that is not in the bracket but found
> in another then it will return the value.
> For example
> /LINE1.*?\(.*?B=([^\)]).*?)/is
>
> Would give me $1 = 12 even though B is in the next set of brackets.
> How can I return the values found in the correct set of brackets? (and
> nothing if it is not found).
Well, key is you have to stay _inside_ the brackets. Be very wary with the
dot here, it will match newlines due to /s, and skip over brackets if 'B='
is not in them.
As I see it, you've got 2 options:
1. Don't let the dot match newlines, i.e:
/LINE1.*?\(.*?B=([^\)]+)\)/i
2. Stay inside the first found brackets, i.e:
/LINE1[^\(]*\([^\)]*?B=([^\)]+)\)/i
Offcourse, if, like in your example, the value of A or B is always an
integer, better to match that:
/LINE1[^\(]*\([^\)]*?B=[^0-9\)]*([0-9]+)\)/i
--
Grtz,
Rik Wasmus
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