Perl List Functions
The Perl list functions are one of the most important category of the built-in Perl functions. As you know, three data types are available in the Perl language: scalars, arrays and hashes.
A scalar, which represents the fundamental type of Perl data, can be a string, a number or a reference. When you group together two or more scalars, you have a list.
You can manipulate lists through several built-in Perl list functions, including:
|grep||is used as a filter to extract those elements of a list for which an expression (or a regular expression) is evaluated true; it returns the sublist of the elements that passed the filter test|
|join||with this function you can merge any number of strings you want; you can specify with what token you want to delimitate the strings; in other words you can concatenate all the string elements of a list into a string, using a separator|
|map||takes a list and evaluates an expression or block on each element of the list; it returns a list with the results|
|qw/STRING/||this 'quote word' function is used to generate a list of words and returns the list containing the words; it automatically quotes the strings for you|
|reverse||in a scalar context, it concatenates the elements of a list in a string and returns the string with all the characters in an opposite order; in a list context, it returns the list in the reversed order|
|sort||sorts a list in a specific order and returns the sorted list|
|unpack||it expands a binary string into a list of values by using a template format|
Follow the above links to learn more about how to use the Perl list functions.
Table of Contents:
A Perl Script
Perl Data Types
Built-in Perl Functions
Functions by Category
Regular Expressions and Pattern Matching
List Functions (more)
Functions in alphabetical order
return from Perl List Functions to Perl Basics
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