From: "Erwin S. Andreasen" <erwin@pip.dknet.dk>

On Tue, 24 Mar 1998, Richard Daugherty wrote:
> I want to change all the vnums i have in an area so i can use it on my
> mud. I tried to do tr 6641 1701 < area.are 

tr translates one character set into another, e,g. translate each of abcd
into ABCD, so a -> A, etc.

Use perl:

perl -pi~ -e 's/66(\d\d)/17\1/g' file.are

To substitute all sequences of 66 followed by two digits to 17 followed by
those two digits.

This will modify file.are but leave a backup in file.are~

-p - print each line in the file
-i~ - modify in place, leave backup in ~

-e - the whole script follows on command line

s/X/Y/Z substitute X whenever you see it with Y, using options Z

66(\d\d) - substitute 66 followed by two digits (\d\d) - the parens group
the two digits so perl will remember them

17\1 - substitute with 17 and the first parenthized thing in search
pattern, i.e. the last two digits

g - substitute globally, i.e. not just once on each line.


Go buy a Perl book. Preferrably one written by Larry Wall, so he can the
money he well deserves for writing Perl :)


==============================================================================
Erwin Andreasen   Herlev, Denmark <erwin@pip.dknet.dk>  UNIX System Programmer
<URL:http://www.abandoned.org/drylock/>     <*>         (not speaking for) DDE
==============================================================================
