Syamala Tadigadapa > Uniq > Uniq

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Module Version: 0.01   Source  

NAME ^

  Uniq - Perl extension for managing list of values.

SYNOPSIS ^

        use Uniq;
        
        my @out = uniq sort @input;
        my @out = distinct sort @input;
        my @out = dups sort @input;

        Uniq exports three methods 'uniq', 'distinct' and 'dups'.
        All these methods accepts a list and returns a list.

ABSTRACT ^

        Similar functionality is available at shell prompts of *nix O/S.
        This modules is attempting to provide the same to Perl programming,

DESCRIPTION ^

        The usage of the methods provided here is simple. You always provide
        a sorted list to any of these methods and accept a sorted list of
        values in return.

        Suppose @lis1 and @list2 are two available lists defined as
        follows:

        @list_1 = qw ( first list of values );
        @list_1 = qw ( second list of values );

        and we run the following commands:

        my @output_1 = uniq sort @list1 @list2;
        my @output_2 = distinct sort @list1 @list2;
        my @output_3 = dups sort @list1 @list2;


        Now @output_1 has qw( first list of second values )
            @output_2 has qw( first second )
        and @output_3 has qw( list of values )
        
        Thus @output_1 has all values from either input lists sans any
        redundant values. @output_2 has exactly those values that appear
        at most once in combined list. On the other hand @output_3 has
        a list of values that appear multiple times in input.

EXPORT

   Exported are methods
        1) uniq       [ similar to 'uniq' shell command ]
        2) distinct   [ similar to 'uniq -u' shell command ]
        3) dups       [ similar to 'uniq -d' shell command ]

SEE ALSO ^

  none.

AUTHOR ^

   Syamala Tadigadapa

COPYRIGHT AND LICENSE ^

Copyright 2003 by Syamala Tadigadapa.

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

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