This section of the FAQ answers questions related to manipulating numbers, dates, strings, arrays, hashes, and miscellaneous data issues....

"Net::Server" is an extensible, generic Perl server engine. "Net::Server" attempts to be a generic server as in "Net::Daemon" and "NetServer::Generic". It includes with it the ability to run as an inetd process ("Net::Server::INET"), a single connect...

When you install a Perl module from CPAN, documentation gets installed which is readable with perldoc and (at least on *nix-like systems) with man as well. You can convert that documentation to text and HTML formats with two utilities that come along...

Selenium is a test tool that allows you to write automated web application UI tests in any programming language against any HTTP website using any mainstream JavaScript-enabled browser. This module is an implementation of the client for the Remote dr...

General Use This module will locate directories along the path to $FindBin::Bin and "use lib" or export an array of the directories found. The default is to locate "lib" directories and "use lib" them without printing the list. Options controll wheth...

• FindBin::libs - locate and a 'use lib' or export directories based on $FindBin::Bin.

This installs 'import' and 'exports' subroutines into the callers namespace. The 'import' does the usual deed: exporting symbols by name; 'exports' simplifies introspection by listing the exported symbols (useful for testing). The optional "dispather...

This package exports a single subroutine , $exercise, which functions as an OO execution loop (see 'export' for changing the installed name). $execute is a subroutine reference that takes an object and set of operations. The first element in that lis...

There are times when constructing an object is expensive or has to be delayed -- database handles in heavily forked apache servers are one example. This module creates a "trampoline" object: when called it replaces the object you have with the object...

Singly-linked list managed via ref-to-scalar. Nodes on the list are ref-to-next followed by arbitrary -- and possibly empty -- user data: my $node = [ $next, @user_data ]. The list handler can reference the list contents via double-dollar. For exampl...

• LinkedList::Single - singly linked list manager.
• LinkedList::Single - singly linked list manager.

Basic idea: Divide up the source space for a module distro by supporting Perl version. At that point when you want to start using features in a new version of Perl just start a new directory and work with it. When you release the module distro the mo...

Arguments to use (or configure). The finish, debug, and verbose arguments default to true. This means that turning them on does not require an equals sign and value. Turning them off requries an equal sign and zero. The export option defaults to fals...

The Quantum::Superpositions module adds two new operators to Perl: "any" and "all". Each of these operators takes a list of values (states) and superimposes them into a single scalar value (a superposition), which can then be stored in a standard sca...

A "Statistics::WeightedSelection" object is intended to hold unordered objects (at least logically from the caller's perspective) that each have a corresponding weight. The objects can be any perl scalar or object, and the weights can be any positive...

Initial Sanity Checks Aside from failing to open the output file, lack of "ldd" on the user's path will cause this to fail. When DEVEL_SHAREDLIBS_PRINT is true an intiail check of "ldd --version" is run. If this returns non-zero then a failure messag...

This module installs a "value" keyword which can be used to create constant-valued varabies in Perl5. The "value" keyword can be applied to simple scalars, nested structures such as arrays or hashes, or the return value of subroutine calls. The norma...

The "fold" pattern is common in FP languages. It is commonly seen as a "Right Fold" in the form of reduce, which takes a single value and iterates it with the stack to form a single value (e.g., with an addition to get a sum). A recursive solution to...

This will print a stack trace to STDERR -- similar to the sigtrap module but without the core dump using simpler syntax. The module arguemts are signals on which to print the stack trace. For normally-terminating signals (e.g., TERM, QUIT) it is proa...

This module is a fork of Signal::StackTrace, which has a uselessly verbose output format. But its interface is perfect, hence this module, which just uses "cluck" in Carp. This will print a stack trace to STDERR -- similar to the sigtrap module but w...