From: Ben Harris <bjh21@bjh21.me.uk>
Date: Tue, 14 May 2024 12:16:38 +0000 (+0100)
Subject: 14a: map constructed
X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~bjharris/git?a=commitdiff_plain;h=5854d410a9335b68928413d81cbefae3a614c652;p=aoc-2022.git

14a: map constructed
---

diff --git a/14/14a.bqn b/14/14a.bqn
index 3d5a350..407a672 100644
--- a/14/14a.bqn
+++ b/14/14a.bqn
@@ -1,2 +1,35 @@
+Split←{
+  blocknums ← +`𝕨
+  # Set entries in blocknums to -1 when they correspond with delimiters.
+  blocknums ↩ (¯1¨)⌾(𝕨⊸/) blocknums
+  blocknums⊔𝕩
+}
+
 _and_and_←{𝕨𝔽◶⟨0,𝕘⟩𝕩}
 _or_or_  ←{𝕨𝔽◶⟨𝕘,1⟩𝕩}
+
+Prep←{𝕊 lines:
+  {
+    fields←(⊑∘∊⟜" ->"¨𝕩) Split 𝕩 # Ewww
+    fields↩(0=4|↕≠fields)/fields
+    {
+      •ParseFloat¨(','=𝕩)Split𝕩
+    }¨fields
+  }¨lines
+}
+
+RectIndices←{
+  i←>𝕨⋈𝕩
+  (⌊˝i)⊸+¨⥊↕(1+⌈˝i)-(⌊˝i)
+}
+
+Plot←{
+  # Assume all co-ordinates are positive.
+  map←(1+⌈˝>∾𝕩)⥊0
+  {𝕊⟨from,to⟩:
+    map ↩ 1¨⌾((from RectIndices to)⊸⊑) map
+  }˘∾2↕¨𝕩
+  map⊏".#"
+}
+
+•Show Plot Prep •file.Lines ⊑•args