#!/usr/bin/env perl

use strict;
use warnings;

use PDL;
use PDL::NiceSlice;

my $x = pdl(0,4,0,-3);

print "Before: $x\n";

$x(which($x > 0)) .= 1;
$x(which($x < 0)) .= 0;
$x(which($x == 0)) .= int(rand(9)) > 5 ? 1: 0;

print "After: $x\n";

exit;