Array::Utils3pm

Usage

        use Array::Utils qw(:all);
        
        my @a = qw( a b c d );
        my @b = qw( c d e f );
        # symmetric difference
        my @diff = array_diff(@a, @b);
        # intersection
        my @isect = intersect(@a, @b);
        
        # unique union
        my @unique = unique(@a, @b);
        
        # check if arrays contain same members
        if ( !array_diff(@a, @b) ) {
                # do something
        }
        
        # get items from array @a that are not in array @b
        my @minus = array_minus( @a, @b );

Overview

A small pure-perl module containing list manipulation routines. The module emerged because I was tired to include same utility routines in numerous projects.

Functions

"unique"

Returns an array of unique items in the arguments list.

"intersect"

Returns an intersection of two arrays passed as arguments, keeping the order of the second parameter. A nice side effect of this function can be exploited in situations as:

        @atreides = qw( Leto Paul Alia 'Leto II' );
        @mylist = qw( Alia Leto );
        @mylist = intersect( @mylist, @atreides );  # and @mylist is ordered as Leto,Alia

"array_diff"

Return symmetric difference of two arrays passed as arguments.

"array_minus"

Returns the difference of the passed arrays A and B (only those array elements that exist in A and do not exist in B). If an empty array is returned, A is subset of B.

Function was proposed by Laszlo Forro <[email protected]>.

Warranty

This is free software. IT COMES WITHOUT WARRANTY OF ANY KIND.