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Environment variables in Perl / use Env
If I say use Env;, Perl loads in a module which allows me to access all my environment variables directly within my code, by name. If I add an explicit list of variable names as a list to the module, then only those variables will be imported. So in this example, $PATH prints nothing but $SHELL and $PWD tell you the shell and the present working directory. Extra environment variables can be accessed directly from the %ENV hash (and that can be done whether or not you have called the module in).
# Env brings environment into current namespace(written 2008-07-11 06:35:49) Associated topics are indexed under P210 - Perl - Topicalization and Special VariablesP211 - Perl - Hashes
Some other Articles
There is more that one way - PerlA Train Service Update for Melksham Party in the Park Configuring Apache httpd The Story of Well House Manor Environment variables in Perl / use Env Finding operating system settings in Perl Perl ... adding to a list - end, middle, start Running operating system commands in Perl Training Course and Business Conference Technology FTP server on Fedora Linux 1781 posts, page by page
Link to page ... 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36 at 50 posts per pageThis is a page archived from The Horse's Mouth at http://www.wellho.net/horse/ - the diary and writings of Graham Ellis. Every attempt was made to provide current information at the time the page was written, but things do move forward in our business - new software releases, price changes, new techniques. Please check back via our main site for current courses, prices, versions, etc - any mention of a price in "The Horse's Mouth" cannot be taken as an offer to supply at that price. Link to Ezine home page (for reading). Link to Blogging home page (to add comments). |
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