Hi PerlMonks,

I have an array like @array = qw/a b c d/; I am interested to find out the pairwise difference and product between any two elements in the array by taking out each element from the array and then calculating the difference and the product as shown in the expected result. Since there are 4 elements, there will be n(n-1)/2=6 pairwise differences and products, where n=4.

#!usr/bin/perl 
use warnings;
 
@array=qw/a b c d/; 
# Code for taking out each element: 

foreach $item (@array) { $each_ele=$item;
  print"\n Each element: $each_ele\n"; }  

# Code ?????
............
............

exit;

[download]

The expected result should look like:

Difference: 
a-b 
a-c 
a-d 
b-c 
b-d 
c-d 

Product: 
a.b
a.c
a.d 
b.c 
b.d 
c.d

[download]

In reply to How can one find out the pairwise difference and product between elements in a perl array without using a perl module? by supriyoch_2008

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.