Hi,

Hi all, I am trying to implement a co-relation problem in perl. I have two arrays i.e. array1 and array2 which contain following values. 

array1    array2
read      book
eat       apple
book      novel
apple     banana
play      football
tennis    football
novel     mazagine

[download]
I want my output as: 
Hi all,
I am trying to implement a co-relation problem in perl. I have  two ar
+rays i.e. array1 and array2 which contain following values.
<c>
array1    array2      array3    array4
read      book        novel     magazine
eat       apple       banana
play      football    tennis

[download]
i tried implementing it with simple for loops as: 
#Step no.1
for($i=0;$i<$arraylength;$i++)
{
    for($j=0;$j<$arraylength;$j++)
    {
        if($array2[$i]eq $array1[$j])
        {
            $array3[$i] = $array2[$j];
        }
            }
}
#Step no.2
for($i=0;$i<$arraylength;$i++)
{
    for($j=$i+1;$j<$arraylength;$j++)
    {
        if($array2[$i]eq $array2[$j])
        {
            $array3[$i] = $array1[$j];
        }
    }
}
#Step no.3
for($i=0;$i<$arraylength;$i++)
{
    for($j=0;$j<$arraylength;$j++)
    {
        if($array2[$i]eq $array1[$j])
        {
            $array4[$i] = $array3[$j];
        }
            }
}

[download]
But its not showing the proper output. It shows some random output in array3 and array4.

I guess there is some problem in the step no.2. It shows error stating that 'array3' cannot be null.

How can we initialize array to null values??

my @array3=(); #is it correct??

When the second step executes.. it compares the two same value but the value stored in array3 from array1 is not a string infact something like..HASH(0x82e3594), HASH(0x82e35a0). What could be the problem. Please guide me. Thanking you,

In reply to how to initialize array to null values by sharan

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