From c2d5208ded891b4b9a21753021d96bdde0f90e6b Mon Sep 17 00:00:00 2001
From: Jan Krňávek <Jan.Krnavek@gmail.com>
Date: Sun, 18 Oct 2020 13:11:43 +0200
Subject: solutions week 082

---
 challenge-082/wambash/raku/ch-2.raku | 42 +++++++++++++++++++++++++++++-------
 1 file changed, 34 insertions(+), 8 deletions(-)

diff --git a/challenge-082/wambash/raku/ch-2.raku b/challenge-082/wambash/raku/ch-2.raku
index 6b159c8eaf..b15a83588a 100644
--- a/challenge-082/wambash/raku/ch-2.raku
+++ b/challenge-082/wambash/raku/ch-2.raku
@@ -1,18 +1,44 @@
 #!/usr/bin/env raku
 
-multi iter ( ( (),Empty ) ) {
+multi step ( ( :@what where :!elems, :@from where :!elems ) ) {
     True
 }
 
-multi iter ( (@c,+@a) ) {
-    @a.first: { .head eqv @c.head}, :k
-    andthen \(@c.skip, |@a[0..^ $_], @a[$_].skip.cache||Empty, |@a[$_ ^.. *])
+multi step ( (:@what, :@from ) ) {
+    @from.first: { .head eqv @what.head}, :k
+    andthen \(
+        what => @what.skip,
+        from => (
+            |@from[0 ..^ $_],
+            @from[$_].skip.cache || Empty,
+            |@from[$_ ^.. *]
+        ).pick(*),
+    )
     orelse False
 }
 
-\((1,2,2,2,3),(1,2),(2,2,3)), *.&iter ... Bool
-andthen .say;
+multi interleave ( :@what, :@from ) {
+    \( :@what, :@from )
+    andthen $_, *.&step ... Bool
+}
+
+multi interleave ( Str :$what, :@from ) {
+    samewith(
+        what => $what.comb,
+        from => @from.map: *.comb.cache,
+    ).tail
+}
+
+
+multi MAIN ( $what, +@from ) {
+    say interleave(:$what, :@from)
+}
 
-sub interleave-string (@c, +@a) {
-    ...
+multi MAIN (Bool :$test!) {
+    use Test;
+    is-deeply interleave( :what(1,2,2,3), :from((1,2),(2,3)) ).[*-3], \( :what((3).Seq),:from(((3,),).Seq) );
+    ok interleave( :what<XXY>, :from<XY X> );
+    ok interleave( :what<XXXXZY>, :from<XXY XXZ> );
+    nok interleave( :what<XXY>, :from<YX X> );
+    done-testing;
 }
-- 
cgit