Perl is an abbreviation of Practical Extraction and Report Language, which can
be translated into "Practical Report Extraction Language". Perl is an advanced,
Perl tutorial versatile, straightforward, dynamic programming language. Perl was
originally designed by Larry Wall on December 18, 1987. Perl borrows features
from C, sed, awk, shell scripts, and many other programming languages. The most
important feature of Perl is the integration of regular expressions in Perl and
the huge third-party code base CPAN.
This tutorial is for developers who want
to learn the Perl programming language from scratch. Of course, this tutorial
will also go into some modules to give you a better understanding of Perl's
application.
Before continuing with this tutorial, you should understand some
basic computer programming terminology. If you have studied PHP, ASP and other
programming languages, you will be able to learn more about Perl
programming.
Perl, a feature-rich computer programming language that runs on
more than 100 computer platforms for a wide range of applications, from
mainframe to portable devices, from rapid prototyping to large-scale scalable
development.
The Perl language is used in a wide range of applications.
In addition to CGI, Perl is used in graphics programming, systems management,
network programming, finance, biology, and other fields. Because of its
flexibility, Perl is known as the Swiss Army Knife in scripting
languages.
Perl is a programming language designed by Larry Wall and
constantly updated and maintained by him. Perl has the power and flexibility of
a high-level language such as C. In fact, you will see that many of its features
are borrowed from the C language. Perl is like a scripting language. Perl
doesn't require compilers and linkers to run code. All you have to do is write
the program and tell Perl to run it. This means that Perl is ideal for quick
solutions to small programming problems and for prototyping large events to test
potential solutions. Perl provides all the features of scripting languages such
as sed and awk, as well as many of the features they don't have. Perl also
supports sed to Perl and awk to Perl translators. In short, Perl is as powerful
as C, as easy as scripting languages such as awk and sed.
It is also because
of Perl's flexibility and "excessive" redundant syntax that it has gained a
"write-only" reputation because Perl programs can be written very casually (for
example, variables can be declared without declaration). Use it directly, but
you may get less results by writing fewer letters (without giving an error). The
code of many Perl programs is hard to read, and the length of the program code
that implements the same function can be ten times different, which makes the
program The maintainers (even writers) are difficult to maintain. Similarly,
because of the random nature of Perl, it may cause some Perl programmers to
forget the grammar, so that they have to check the Perl manual frequently. The
suggested workaround is to use use strict; and use warnings; in the program, and
to harmonize the code style, using the library instead of using "hard code".
Perl can also write code as elegant as languages like Python or Ruby. A lot of
times, the perl. exe process takes up a lot of memory space, although it is only
a moment, but it feels bad.
