286

	new file:   ch-1.raku
	new file:   ch-2.raku

3 files changed, 129 insertions, 2 deletions

diff --git a/challenge-284/0rir/raku/ch-2.raku b/challenge-284/0rir/raku/ch-2.raku
index 5b4be54966..4de0440bd7 100644
--- a/challenge-284/0rir/raku/ch-2.raku
+++ b/challenge-284/0rir/raku/ch-2.raku
@@ -1,8 +1,6 @@
 #!/usr/bin/env raku
 # :vim ft=raku sw=4 expandtab  # 🦋 ∅∪∩∋∈∉⊆ ≡ ≢ «␤ » ∴
 use v6.d;
-INIT $*RAT-OVERFLOW = FatRat;
-use lib $?FILE.IO.cleanup.parent(2).add("lib");
 use Test;
 
 =begin comment
diff --git a/challenge-286/0rir/ch-1.raku b/challenge-286/0rir/ch-1.raku
new file mode 100755
index 0000000000..a4194bdb33
--- /dev/null
+++ b/challenge-286/0rir/ch-1.raku
@@ -0,0 +1,11 @@
+#!/usr/bin/env raku
+use v6.d;
+
+=begin comment
+286-1: Self Spammer
+Submitted by: David Ferrone
+Write a program which outputs one word of its own script / source code at random. A word is anything between whitespace, including symbols.
+…
+=end comment
+
+say $*PROGRAM-NAME.IO.slurp.words.pick;
diff --git a/challenge-286/0rir/ch-2.raku b/challenge-286/0rir/ch-2.raku
new file mode 100644
index 0000000000..7ea7b70d4f
--- /dev/null
+++ b/challenge-286/0rir/ch-2.raku
@@ -0,0 +1,118 @@
+#!/usr/bin/env raku
+# :vim ft=raku sw=4 expandtab  # 🦋 ∅∪∩∋∈∉⊆ ≡ ≢ «␤ » ∴
+use v6.d;
+use lib $?FILE.IO.cleanup.parent(2).add("lib");
+use Test;
+
+=begin comment
+Put a different way, go through an array halving its size by taking,
+starting at index 0, two elements and replacing them with their min.
+The next two elements are replaced by their max. Continue through the
+array, alternating min and max.  Repeat this on each derived array until
+there is one element which is the solution.
+
+
+286-2: Order Game
+Submitted by: Mohammad Sajid Anwar
+You are given an array of integers, @ints, whose length is a power of 2.
+
+Write a script to play the order game (min and max) and return the last element.
+
+Example 1
+Input: @ints = (2, 1, 4, 5, 6, 3, 0, 2)
+Output: 1
+
+Operation 1:
+
+    min(2, 1) = 1
+    max(4, 5) = 5
+    min(6, 3) = 3
+    max(0, 2) = 2
+
+Operation 2:
+
+    min(1, 5) = 1
+    max(3, 2) = 3
+
+Operation 3:
+
+    min(1, 3) = 1
+Example 2
+Input: @ints = (0, 5, 3, 2)
+Output: 0
+
+Operation 1:
+
+    min(0, 5) = 0
+    max(3, 2) = 3
+
+Operation 2:
+
+    min(0, 3) = 0
+Example 3
+Input: @ints = (9, 2, 1, 4, 5, 6, 0, 7, 3, 1, 3, 5, 7, 9, 0, 8)
+Output: 2
+
+Operation 1:
+
+    min(9, 2) = 2
+    max(1, 4) = 4
+    min(5, 6) = 5
+    max(0, 7) = 7
+    min(3, 1) = 1
+    max(3, 5) = 5
+    min(7, 9) = 7
+    max(0, 8) = 8
+
+Operation 2:
+
+    min(2, 4) = 2
+    max(5, 7) = 7
+    min(1, 5) = 1
+    max(7, 8) = 8
+
+Operation 3:
+
+    min(2, 7) = 2
+    max(1, 8) = 8
+
+Operation 4:
+
+    min(2, 8) = 2
+
+=end comment
+
+constant @gtr-power-of-two = lazy 4, (* × 2) …  2**10;
+
+my @Test =
+    (2, 1, 4, 5, 6, 3, 0, 2),                           1,
+    (9, 2, 1, 4, 5, 6, 0, 7, 3, 1, 3, 5, 7, 9, 0, 8),   2,
+    (2, 2, 1, 2, 2, 2, 2, 1),                           2,
+    (1,2),                                              1,
+    (2,1),                                              1,
+    (2,2),                                              2,
+    (5,),                                               5,
+    (),                                                 Int,
+    (0, 5, 3, 2),                                       0,
+;
+
+plan @Test ÷ 2;
+
+
+sub prefix:<≭>( Bool $a is rw ) { $a = !$a }    # U-226D 'not equiv to'
+
+multi task( @a where *.elems ≤ 2) { @a.elems == 0 ?? Int !! @a.min }
+multi task( @a ) {
+    my Bool $f;
+    my @b = @a.rotor(2).map({ ≭$f ?? $_.min !! $_.max }).Array;
+    task( @b.Array);
+}
+
+for @Test -> $in, $exp {
+    is task($in), $exp, $exp // "Int" ~ " <- "  ~ $in.raku;
+}
+
+done-testing;
+
+my @int = (2, 2, 1, 2, 2, 2, 2, 1);
+say "\nInput: @int = @int[]\nOutput: { task @int }";