From: Ben Harris <bjh21@bjh21.me.uk>
Date: Thu, 9 May 2024 12:49:19 +0000 (+0100)
Subject: 09b done
X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~bjharris/git?a=commitdiff_plain;h=71de27500d760395f106375f847d5718526be501;p=aoc-2022.git

09b done
---

diff --git a/09/09b.bqn b/09/09b.bqn
new file mode 100644
index 0000000..f857c80
--- /dev/null
+++ b/09/09b.bqn
@@ -0,0 +1,16 @@
+Prep←{
+  directions←⍉['U'‿⟨0,1⟩,'D'‿⟨0,¯1⟩,'L'‿⟨¯1,0⟩,'R'‿⟨1,0⟩]
+  dirs←((⊏directions)⊐⊑¨𝕩)⊏(1⊏directions)
+  dists←{•ParseFloat 2↓𝕩}¨𝕩
+  dists/dirs
+}
+
+StepH←{h𝕊m:h+m}
+StepT←{t𝕊h:t+(×h-t)×(∨´1<|h-t)}
+
+Main←{
+  start←<⟨0,0⟩
+  +´∊ (start⊸(StepT`))⍟9 start StepH` 𝕩
+}
+
+•Show Main Prep •file.Lines ⊑•args