Qt is a cross-platform application and UI framework for developers
using C++ or QML, a CSS/JavaScript-like language.
With Qt, code can be reused efficiently to target multiple platforms
with one code base. The modular C++ class library and developer tools
easily enables developers to create applications for one platform and
easily build and run to deploy on another platform.
This module understands the formats used by SQLite for its DATE, DATETIME, TIME,
and TIMESTAMP data types. It can be used to parse these formats in order to
create DateTime objects, and it can take a DateTime object and produce a string
representing it in the SQLite format.
Devel-Declare-Parser is a higher-level API sitting on top of
Devel::Declare. It is used by Devel::Declare::Exporter to simplify
exporting of Devel::Declare magic. Writing custom parsers usualy only
requires subclassing this module and overriding a couple methods.
The Devel::SmallProf profiler is focused on the time taken for a program
run on a line-by-line basis. It is intended to be as "small" in terms
of impact on the speed and memory usage of the profiled program as
possible and also in terms of being simple to use.
The Devel::Profile package is a Perl code profiler. This will collect
information on the execution time of a Perl script and of the subs in that
script. This information can be used to determine which subroutines are using
the most time and which subroutines are being called most often.
Devel::TraceUse - Show the modules your program loads, recursively.
An apparently simple program may load a lot of modules. That's useful, but
sometimes you may wonder exactly which part of your program loads which module.
Devel::TraceUse can analyze a program to see which part used which module.
Dir::Project provides a way to locate a source-controlled directory
(CVS, Subversion, Perforce, etc) using only the current working
directory (cd). This prevents users from having to set other
environment variables when they switch between areas, and allows
scripts and such inside the directory to be executed without changing
the user's PATH.
The Exporter module implements an "import" method which allows a module
to export functions and variables to its users' namespaces. Many modules
use Exporter rather than implementing their own "import" method because
Exporter provides a highly flexible interface, with an implementation
optimised for the common case.
File::ExtAttr is a Perl module providing access to the extended
attributes of the files.
Extended attributes are metadata associated with a file. Examples are
access control lists (ACLs) and other security parameters. But users can
add their own key=value pairs.
Extended attributes are supported by FreeBSD starting from version 5.
FcntlLock is a module to do file locking in an object oriented fashion using
the fcntl(2) system call. This allows locks on parts of a file as well as on
the whole file and overcomes some known problems with flock(2), on which Perls
flock() function is based by default.