Perl Programming. PickingUpPerl.pdf (application/pdf Object) Introduction to Perl on Windows. Whether you are simply wishing to begin an investigation of the core language and your platform happens be Windows or whether you wish to look at specific-Windows integration tools such as 1) OLE [ object linking and Embedding ] with PERL, 2) control of the Windows registry via PERL, 3) using PERL to write COM [ Component Object Model ] objects, 4) communicating with pre existing COM objects from PERL, or 5) facilitating data aware pages via the PERLscript and IIS [ Internet Information Server ], your starting point remains the same - the installation of PERL on Windows. This article is intended as a guide to that process. Future additions will delve more deeply into the Windows-specific capabilities of Perl.
Before you start though, we have one warning. Installing Perl is not a "click here and you're done" process. In fact, packaging Perl for Windows is an iterative process. Perl for Windows is available from the ActiveState site as a product called ActivePerl. The headings include: Beginner's Introduction to Perl. Editor's note: this venerable series is undergoing updates. You might be interested in the newer versions, available at: First, a Little Sales Pitch Welcome to Perl. Perl is the Swiss Army chainsaw of scripting languages: powerful and adaptable. It was first developed by Larry Wall, a linguist working as a systems administrator for NASA in the late 1980s, as a way to make report processing easier. Since then, it has moved into a large number of roles: automating system administration, acting as glue between different computer systems; and, of course, being one of the most popular languages for CGI programming on the Web.
Why did Perl become so popular when the Web came along? It also didn't hurt that Perl is a friendly language. In this first part of our series, you'll learn a few basics about Perl and see a small sample program. A Word About Operating Systems Your First Perl Program Take the following text and put it into a file called first.pl: #! Now, run it with your Perl interpreter. Loops. Object-Oriented Perl. I've recently started learning to play the game of Go. Go and Perl have many things in common -- the basic stuff of which they are made, the rules of the game, are relatively simple, and hide an amazing complexity of possibilities beneath the surface. But I think the most interesting thing I've found that Go and Perl have in common is that there are various different stages in your development as you learn either one.
It's almost as if there are several different plateaus of experience, and you have to climb up a huge hill before getting onto the next plateau. For instance, a Go player can play very simply and acquit himself quite decently, but to stop being a beginner and really get into the game, he has to learn how to attack and defend economically. Then, to move on to the next stage, he has to master fighting a repetitive sequence called a "ko.
" So what is it? The same code, written in an object-oriented style, would look a little different: What's going on here? Why is it a win? #! #! Perl Tutorial :: Tutorial. NextPreviousContents 2. Tutorial Majority of the contents of this tutorial section were written by Nik Silver, at the School of Computer Studies, University of Leeds, UK. Assuming working knowledge of any programming language, we will now try to see what Perl programs look like. 2.1 First Step Ever since Kernighan and Ritchie came out with C programming language, people have started learning almost any programming language with the obligatory "Hello World" program. Hello World! Here is the basic perl program that we'll use to get started. #! Comments A common Perl-pitfall is to write cryptic code.
Statements Everything other than comments are Perl statements, which must end with a semicolon, like the last line above. 2.2 Running Perl Type in the example program using a text editor, and save it. After you've entered and saved the program make sure the file is executable by using the command chmod u+x progname at the UNIX prompt, where progname is the filename of the program. Perl -w progname $#food. Perl Programming - Free computer book. Perl is a dynamic programming language created by Larry Wall and first released in 1987. Perl borrows features from a variety of other languages including C, shell scripting (sh), AWK, sed and Lisp. Structurally, Perl is based on the brace-delimited block style of AWK and C, and was widely adopted for its strengths in string processing, and lack of the arbitrary limitations of many scripting languages at the time.
Larry Wall began work on Perl in 1987, while working as a programmer at Unisys,[3] and released version 1.0 to the comp.sources.misc newsgroup on December 18, 1987. The language expanded rapidly over the next few years. Perl 2, released in 1988, featured a better regular expression engine. Until 1991, the only documentation for Perl was a single (increasingly lengthy) man page. Perl 4 went through a series of maintenance releases, culminating in Perl 4.036 in 1993. Initial design of Perl 5 continued into 1994. Perl 5 was released on October 17, 1994. The Perl Programming Language - www.perl.org.