From 89ee325dbd178ebc7219272c8d99c71fbdb9f278 Mon Sep 17 00:00:00 2001
From: Simon Proctor <simon.proctor@zoopla.co.uk>
Date: Mon, 23 Nov 2020 11:52:41 +0000
Subject: Challenge 2 with lots of options

---
 challenge-088/simon-proctor/raku/ch-2.raku | 75 ++++++++++++++++++++++++++++++
 1 file changed, 75 insertions(+)
 create mode 100644 challenge-088/simon-proctor/raku/ch-2.raku

diff --git a/challenge-088/simon-proctor/raku/ch-2.raku b/challenge-088/simon-proctor/raku/ch-2.raku
new file mode 100644
index 0000000000..756fdf0044
--- /dev/null
+++ b/challenge-088/simon-proctor/raku/ch-2.raku
@@ -0,0 +1,75 @@
+#!/usr/bin/env raku
+
+use v6;
+
+my %examples = (
+    'ex1' => [
+        [ 1, 2, 3 ],
+        [ 4, 5, 6 ],
+        [ 7, 8, 9 ],
+    ],
+    'ex2' => [
+        [  1,  2,  3,  4 ],
+        [  5,  6,  7,  8 ],
+        [  9, 10, 11, 12 ],
+        [ 13, 14, 15, 16 ],
+          ],
+    'ex3' => [
+        [ 1, 2, 3 ],
+          ],
+    'ex4' => [
+        [ 1, 2 ],
+        [ 3, 4 ],
+    ],
+    );
+
+my %*SUB-MAIN-OPTS = :named-anywhere;
+
+#| ex1 or ex2 for the examples
+multi sub MAIN (
+    \k where { %examples{k} } #= ex1 or ex2 for the main examples, ex3, ex4 for simple examples
+) {
+    spiralize( %examples{k} ).join(", ").say;
+}
+
+#| Given a width and a list of values
+#| Print the spiral output
+multi sub MAIN(
+    UInt $w, #= Width of the array
+    *@input where { @input.all ~~ UInt && @input.elems %% $w } #= Grid values
+) {
+    spiralize( @input.rotor( $w ) ).join(", ").say;
+}
+
+#| Given a height and width make a grid from 1 upwards that size then sprial it
+multi sub MAIN(
+    UInt $h, #= Height of grid
+    UInt $w, #= Width of grid
+    Bool :v(:$verbose) = False, #= Draw the grid first
+) {
+    my @grid = (1..($h*$w)).rotor($w);
+    @grid.map( *.map( *.fmt('%3d') ).join(", ") ).join("\n").say if $verbose;
+    spiralize( @grid ).join(", ").say;
+}
+
+
+multi sub spiralize( @grid where { @grid.elems == 1 } ) {
+    @grid[0]
+}
+
+multi sub spiralize( @grid where { @grid.elems == 2 } ) {
+    |@grid[0], |@grid[1].reverse
+}
+
+multi sub spiralize( @grid ) {
+    |@grid[0],
+    |((0^..^@grid.end).map( { @grid[$_][*-1] } )),
+    |@grid[*-1].reverse,
+    |((0^..^@grid.end).reverse.map( { @grid[$_][0] } )),
+    |spiralize( center( @grid ) )
+#    @grid
+}
+
+sub center( @grid ) {
+    @grid[0^..^@grid.end].map( -> @a { @a[0^..^@a.end] } );
+}
-- 
cgit