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Windows that you open after this will already know about the new variable.

Type this in the command window, to see the newly set value: flag to perl when running the script.

perl -I /home/foobar/code This will add /home/foobar/code to the beginning of @INC for this specific execution of the script.

Over the years I’ve written countless Word Press and programming tutorials.

Suppose we have a directory full of files which is maintained with a set of automated tools; perhaps one set of tools updates them and another set of tools uses the result.

In this situation, it might be useful for the second set of tools to know if the files have recently been changed.

This is indeed faster in general, but the speed difference will depend on how many updated files there are. This approach seems quite efficient, but unfortunately it has a problem.

Many operating systems now keep file modification time information at a granularity which is finer than one second.

The first such file it encounters will be loaded into memory.

In the Advanced section, click the Environment Variables button.

In the Environment Variables window in the "User variables for Foo Bar" section click on New and type in the following: Variable name: PERL5LIB Variable value: c:\path\to\dir Then click OK 3 times.

We can fix both of these problems (looping and problems with white space), and do things more efficiently too.

The following command works with newlines and doesn't need to sort the list of filenames.


  1. How to use the Linux sed command to edit a file in place, i.e. not having to use the cp or mv commands to edit your original file.

  2. Perlce - Perl for WinCE. Much of this document has become very out of date and needs updating. To start perl by clicking on a perl source file.

  3. Flat-File Databases. The. you need to be especially careful not to break up the records in the wrong place. Using the Perl. Updating data within a flat-file.

  4. Subroutines and functions in Perl;. regardless of their location in the file. This will place the array in SCALAR context and in that context it will return the.

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