my $length = $#MainArray;                              
for (my $x = 0; $x <= $length; $x++)                                      
{
    my $smallLength = $MainArray[$#$x];
    for(my $q = 0; $q <= $smallLength; $q++)
    {
        my $element = $MainArray[$x][$q];
        if(some if statement concerning $element)                    
        {
            splice(How do I reference this part?); 
        }
    }
}