Re: when is a perl module executed?

A module is compiled when it is used. Anything not inside a sub in the module is executed during the load process.

The actual sequence is complicated slightly by BEGIN blocks which are executed before anything else in the current source file.

Simplistically the execution sequence is: BEGIN blocks, use statements, source code, END blocks. Each source file processed as the result of a use follows the same execution sequence so use statements result in nesting.

Perl is environmentally friendly - it saves trees

Comment on Re: when is a perl module executed?

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Re^2: when is a perl module executed? by ketaki (Acolyte) on Jul 17, 2008 at 03:24 UTC
it doesnt seem so. i added a statement which is written below into an already existing module which i had written. the line which i added is `print "aaaaaaaaaaaaaaaaaa";` [download] and it doesnt print that text (aaaaaaaaaaaa) when the perl file is executed. Is it becoz im executing the perl file on the webserver and seeing the output on the browser on the internet. the perl file is a cgi file. the rest of the program runs. only this text (aaaaaaaaaaaaaaaaaaaaa) is not being printed anywhere.	[reply] [d/l]
Re^3: when is a perl module executed? by chromatic (Archbishop) on Jul 17, 2008 at 05:00 UTC
and it doesnt print that text (aaaaaaaaaaaa) when the perl file is executed. If it doesn't, then print is broken in Perl and no one has noticed all these years. print is probably not broken in Perl. It's more likely that that (unbuffered) print occurs before you've finished printing HTTP headers to the browser, so it's getting lost somewhere that you don't see it. Run your program from the command line instead to see that, indeed, print works in Perl as it has worked for 20 years.	[reply]
Re^3: when is a perl module executed? by GrandFather (Saint) on Jul 17, 2008 at 03:30 UTC
Whatever you are trying to do, it sounds wrong. You are abusing the normal use of modules. Write a sub in the module and have the main script call it. Perl is environmentally friendly - it saves trees	[reply]
Re^4: when is a perl module executed? by ketaki (Acolyte) on Jul 17, 2008 at 03:33 UTC
you mean generally it is done like this that the code in sub is executed when the sub is called for from the perl file right?	[reply]
Re^5: when is a perl module executed? by massa (Hermit) on Jul 17, 2008 at 10:51 UTC
Re^3: when is a perl module executed? by Anonymous Monk on Jul 17, 2008 at 05:13 UTC
You didn't pay off the Executioner :p	[reply]
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