From d59694947b4f327ef3ea7258385481145bb1b150 Mon Sep 17 00:00:00 2001
From: Simon Proctor <simon.proctor@gmail.com>
Date: Mon, 24 Jun 2019 12:26:39 +0100
Subject: Challenge 1. Van Eck's Sequnce

---
 challenge-014/simon-proctor/perl6/ch-1.p6 | 33 +++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 challenge-014/simon-proctor/perl6/ch-1.p6

diff --git a/challenge-014/simon-proctor/perl6/ch-1.p6 b/challenge-014/simon-proctor/perl6/ch-1.p6
new file mode 100644
index 0000000000..7c1f9d2dd7
--- /dev/null
+++ b/challenge-014/simon-proctor/perl6/ch-1.p6
@@ -0,0 +1,33 @@
+#!/usr/bin/env perl6
+
+use v6;
+
+#| Generate Van Eck's sequence
+sub MAIN (
+    UInt $count, #= Amount of sequence to generate
+    UInt $start = 0 # Value to start sequnce from
+) {
+
+    my @van-ecks = lazy gather {
+        take $start;
+        my $n = 0;
+        loop {
+            if any( @van-ecks[^$n] ) == @van-ecks[$n] {
+                my $m;
+                for @van-ecks[^$n].kv.reverse -> $v, $k {
+                    if $v == @van-ecks[$n] {
+                        $m = $k;
+                        last;
+                    }
+                }
+                take $n - $m;
+            } else {
+                take 0;
+            }
+            $n++;
+        }
+    }
+
+    say @van-ecks[0..^$count].join(",");
+
+}
-- 
cgit