Introduction to Perl Perl is an acronym, short for Practical Extraction and Report Language. It was designed by Larry Wall as a tool for writing programs...

Perl Signals Perl allows you to trap signals using the %SIG associative array. Using the signals you want to trap as the key, you can assign a subroutine...

Perl DBI Example The DBI module enables your Perl applications to access multiple database types transparently. You can connect to MySQL, MSSQL, Oracle,...

Perl OOP Why Object Oriented approach? A major factor in the invention of Object-Oriented approach is to remove some of the flaws encountered with the...

Perl File operations Variables which represent files are called “file handles”, and they are handled differently from other variables. They...

Perl Regular Expressions Metacharacters char meaning ^ beginning of string $ end of string . any character except newline * match 0 or more times + match...

Perl Subroutine sub mysubroutine { print "Not a very interesting routinen"; print "This does the same thing every timen"; } regardless of any parameters...

Perl References I’m happiest writing Perl code that does not use references because they always give me a mild headache. Here’s the short version...

The if…else Statement This statement uses a relational expression to check the validity of a condition and execute a set of statements enclosed in...

The Loop Statements Different loop statements in perl… The for Loop The foreach Loop The while Loop The do-while Loop The until Loop The process...

@ARGV and %ENV The built-in array @ARGV contains the command line arguments for a Perl program. The following run of the Perl program critic.pl will have...

Perl Hash Maps/associative arrays ASSIGNING HASH VALUES hash tables consist of key/value pairs every key is followed by a value values can be assigned...

Arrays @ Array constants are specified using parenthesis ( ) and the elements are separated with commas. Perl arrays are like lists or collections in other...