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The search service can find package by either name (apache), provides(webserver), absolute file names (/usr/bin/apache), binaries (gprof) or shared libraries (libXm.so.2) in standard path. It does not support multiple arguments yet...
The System and Arch are optional added filters, for example System could be "redhat", "redhat-7.2", "mandrake" or "gnome", Arch could be "i386" or "src", etc. depending on your system.
Starting with Perl 5.10, it is possible to create a lexical version of the Perl default variable $_. Certain Perl constructs like the "given" keyword automatically use a lexical $_ rather than the global $_. It is occasionallly useful for a sub to be able to access its caller's $_ variable regardless of whether it was lexical or not. The "(_)" sub prototype is the official way to do so, however there are sometimes disadvantages to this; in particular it can only appear as the final required argument in a prototype, and there is no way of the sub differentiating between an explicitly passed argument and $_. This caused me problems with Scalar::Does, because I wanted to enable the "does" function to be called as either: does($thing, $role); does($role); # assumes $thing = $_ With "_" in the prototype, $_ was passed to the function at the end of its argument list; effectively "does($role, $thing)", making it impossible to tell which argument was the role. Enter "lexical::underscore" which allows you to access your caller's lexical $_ variable as easily as: ${lexical::underscore()} You can access lexical $_ further up the call stack using: ${lexical::underscore($level)} If you happen to ask for $_ at a level where no lexical $_ is available, you get the global $_ instead. This module does work on Perl 5.8 but as there is no lexical $_, always returns the global $_.
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