Perl

Apr 22, 2012

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Perl and the web. Perl is the most popular web programming language due to its text manipulation (or) processing capabilities. Perl is called The Duct Tape of Internet.Perl's CGI.pm module, part of Perl's standard distribution, makes handling HTML forms simple. Perl can be embedded into web se

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Perl

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Perl

Perl. Day 3. 1 + 1 = 2. We’ve previously seen you can do math on variables $Num=1 $Num2=$Num+7; print(“$Num2 ”); You can even do math on the same variable: $Num1=$Num1+7; A commonly used short cut for adding 1 to a number is: $Num1++; Likewise you can subtract one: $Num1--;

376 views • 17 slides

Perl

Perl. COMP 205 - Week 7 Dr. Chunbo Chu. Introduction to Perl. P ractical E xtraction and R eport L anguage Created by Larry Wall in the mid-1980s Uses Administration (Shell scripts) Web (CGI, web engines) Good at Text processing Small/Medium sized projects

1.11k views • 86 slides

PERL

PERL. More references, complex data types and objects. References in Perl. An alternative mechanism of using variables such as arrays or associative arrays. Useful to think of a reference as the address of the object in memory.

395 views • 20 slides

Perl

Perl. Programming with the “Swiss Army Chainsaw” of scripting languages. Starting Simple. We will start presuming you have already installed a Perl interpreter such as strawberry If using linux you need to start your file with #!/ usr /local/bin/ perl

430 views • 20 slides

PERL

PERL. Practical Extraction and Report Language. Um Pouco Sobre Perl. Perl é uma linguagem poderosa e adaptável a diversas situações.

713 views • 57 slides

Perl

Perl. File I/O and Arrays. File I/O. Perl allows to open a file to read, write, or append As well as pipe input or output to another program. We get to this piping later on Command open (FILEHANDLE, "filename"); #read a file open (FILEHANDLE, "<filename");# same

627 views • 45 slides

Perl

Perl. Co je Perl a na co je dobrý Základní konstrukce jazyka Jednoduché regulární výrazy Cvičné příklady Literatura. Co je Perl a na co je dobrý. Co je Perl: Interpretovaný jazyk s možností OOP přístupu, původně orientovaný na zpracování textu Spousta podpůrných knihoven pro různé oblasti

355 views • 16 slides

Perl

Perl. regular expressions: string matching. string matching. For this lecture, we focus on string matching using a if statement The format if ($str =~ /pattern to match/) # true when match if ($str !~ /patch to match/) #true when no match the same as

498 views • 35 slides

PERL

PERL. Just like C but with its own set of quirks. Variables. There is no datatype PERL is loosely typed language Variables take on the data type of the data assigned to them Two forms Scalar: single-valued variable Starts with a $ Array: multi-valued (indexed) variable Starts with a @.

258 views • 10 slides

PERL

PERL. Perl Power!. Who uses Perl? Sites with heavy traffic that need excellent text processing capabilities Compiler optimization is also done in Perl System Administrators(the impatient ones, to be exact.) The Swiss Army Knife Language

1.02k views • 76 slides

PERL

PERL. Összeállította: Kosztyán Zsolt Tibor kzst@vision.vein.hu. A PERL alapjai.

902 views • 76 slides

Perl

Perl. Perl. Perl - Practical extraction report language for text files system management combines C, SED, AWK, SH interpreted dynamic. Data Structures. scalars $num arrays @num associative arrays %num $num[50] 50th element of the array num $#num last index of num. Examples.

527 views • 35 slides

Perl

Perl. Perl basics Perl Elements Arrays and Hashes Control statements Operators OOP in Perl. Scripting languages. Scripting language control an application typically not strongly typed typically interpreted (or compiled into byte-code)

403 views • 16 slides

PERL

PERL. History. Introduced in 1987 Created by Larry Wall Designed with the idea to incorporate parts of C, sed, awk, Unix shell scripting, and Lisp into one language. The second version of Perl was released 8 months after the first version. History.

238 views • 10 slides

Perl

Perl. Hour 4 Lists and Arrays. Lists. List is a sequence of scalars Surrounded by parentheses; items separated by commas (‘a’, 5, $alfa, ‘$_’, “the $item”) Usual variable substitution rules apply. List Shortcuts. qw(the $speed $color fox) Creates list from each word with single quotes

271 views • 13 slides

Perl

Perl. Introduction. Why Perl?. Powerful text manipulation capabilities Has a wide range of libraries available Fast Good support for file and process operations Widely used scripting language Alternatives: Python, Ruby. Less suiteable for:. Building large and complex applications

1.44k views • 126 slides

Perl

Perl. Nicola Gessa. Introduzione al Perl. Il Perl ( Pratical Estraction Report Language) è stato creato da Larry Wall verso la fine degli anni 80 E’ un linguaggio interpretato mirato alla manipolazione di stringhe e file di testo

607 views • 43 slides

Perl

Perl. Regular expression: string manipulation. substr function. string = substr(string2,start pos (starts with 0), offset) returns a substring after the start point to offset string2 is not changed $str2 = "Hi There"; $str = substr($str2, 3, 2);

434 views • 29 slides

Perl

Perl. data, scalar data types and control structures. General information about Perl. PERL stands for P ractical E xtraction and R eport L anguage OR P athologically E clectic R ubbish L ister Perl's chief creator is Larry Wall (endorses both names)

555 views • 43 slides

Perl

Perl. OBJECTIVES. What is Perl Concepts Variables Control Structures Modules Objects Windows. Perl. P ractical E xtraction and R eport L anguage Originally designed as a text processing and “glue” language Perl is a scripting language

827 views • 57 slides

Perl

Perl. a bit of history…. Perl created in 1987 by Larry Wall. “Perl was designed to work more like a natural language.”. Perl is open source. “So, whatever it takes to give away my software and get it used, that’s great.”. Probably best known as a CGIscripting language. References.

267 views • 11 slides

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