# Largest palindrome product

*Author: David Romano*

https://projecteuler.net/problem=4

A palindromic number reads the same both ways. The largest palindrome made from the product of two 2-digit numbers is 9009 = 91 × 99.

Find the largest palindrome made from the product of two 3-digit numbers.

Source code: prob004-unobe.pl

use v6; # another case where @array = %*% (100..999) would be nice to have: # http://use.perl.org/~dpuu/journal/38142 sub diagonal_x (@array is copy) { gather while @array.shift -> $this { for @array -> $that { take $this * $that } } } diagonal_x(100...999).grep({ $_ eq $_.flip }).sort.reverse.[0].say;