OT: regex pattern problem

[Peter Kiem]

> I have to find all entries in a file which match the following:
>
> (pg. 2)
> (pg. 210)
> (pg. 211)
> (pg. 309)
> (pg. 4000)

I would use:

\(pg\. [0-9]+\)

This can be explained as

\(       a ( symbol, has to be escaped as ( has meaning in regexp
pg       the letters "pg"
\.       a . symbol, has to be escpaed as . has meaning in regexp
space    a space
[0-9]+   1 or more occurences of a numerical digit
\)       a ) symbol, has to be escaped as ) has meaning in regexp

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