Regular Expression

Noame has asked for the wisdom of the Perl Monks concerning the following question:

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Re: Regular Expression by apl (Monsignor) on Apr 02, 2008 at 17:02 UTC
You wouldn't use regular expressions to test for the existance of the files. `if ( -f $DIR.'/TEST-246.92.00.tar.gz' or -f ${DIR}.'/TEST-246.92.00-IN +TERNAL.tar.gz') { # your processing goes here }` [download]	[reply] [d/l]
Re: Regular Expression by CountZero (Bishop) on Apr 02, 2008 at 16:45 UTC
Please do not put your whole node in `<code>`-tags, but only the code part of it. Answering your question: it is much easier and clearer to have an `if` test for these two strings. `if ($file eq '${DIR}/TEST-246.92.00.tar.gz' or $file eq '${DIR}/TEST-2 +46.92.00-INTERNAL.tar.gz') { ... }` [download] You will have to replace `${DIR}` by its real value of course, unless it is a variable, which I did not assume. If you must have a regex the following will do: `m/\${DIR}/TEST-246.92.00.tar.gz\|\${DIR}/TEST-246.92.00-INTERNAL.tar.gz +/` [download] (Again if necessary replacing `${DIR}`) CountZero A program should be light and agile, its subroutines connected like a string of pearls. The spirit and intent of the program should be retained throughout. There should be neither too little or too much, neither needless loops nor useless variables, neither lack of structure nor overwhelming rigidity." - The Tao of Programming, 4.1 - Geoffrey James	[reply] [d/l] [select]
Re: Regular Expression by ww (Archbishop) on Apr 02, 2008 at 16:45 UTC
You could start by reading the documentation, including `perldoc perlre` after which, you might come back with what you've tried, if you still have questions.	[reply]