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Re: Re: Simple Module Tutorial

by tachyon (Chancellor)
on Aug 06, 2001 at 05:42 UTC ( #102376=note: print w/ replies, xml ) Need Help??


in reply to Re: Simple Module Tutorial
in thread Simple Module Tutorial

Thanks John I've updated the text a bit in line with your suggestions. Forgot the strict in the module! Oops it is back in its rightful place right at the top. I just used the simple $VERSION numbering because this is a simple tute :-) Here is an excerpt from the Exporter manpage for those interested.

Module Version Checking The Exporter module will convert an attempt to import a number from a module into a call to $module_name->require_version($value). This can be used to validate that the version of the module being used is greater than or equal to the required version. The Exporter module supplies a default require_version method which checks the value of $VERSION in the exporting module. Since the default require_version method treats the $VERSION number as a simple numeric value it will regard version 1.10 as lower than 1.9. For this reason it is strongly recommended that you use numbers with at least two decimal places, e.g., 1.09.

cheers

tachyon

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Re: Re: Re: Simple Module Tutorial
by John M. Dlugosz (Monsignor) on Aug 06, 2001 at 08:18 UTC
    Yea, I just posted a tutorial on VERSION.

    For compatibility with mixing decimals and v-strings, the built-in UNIVERSAL::require_version uses three decimal digits per part.

    If you have $MyModule::VERSION= 1.12; (a decimal number) and do a use MyModule 1.20.1 qw/bar/, it will tell you that the module 1.120 and you asked for 1.020, so that's OK. You expected 1.20 to be greater than 1.12, not-OK.

    —John

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