From: Ben Harris <bjh21@bjh21.me.uk>
Date: Sun, 5 May 2024 10:28:33 +0000 (+0100)
Subject: Prep for 05a
X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~bjharris/git?a=commitdiff_plain;h=a7d9b5be995e48fb89d7de5e379aed09718aa136;p=aoc-2022.git

Prep for 05a
---

diff --git a/05/05a.bqn b/05/05a.bqn
new file mode 100644
index 0000000..f144cf1
--- /dev/null
+++ b/05/05a.bqn
@@ -0,0 +1,22 @@
+Split←{
+  blocknums ← +`𝕨
+  # Set entries in blocknums to -1 when they correspond with delimiters.
+  blocknums ↩ (¯1¨)⌾(𝕨⊸/) blocknums
+  blocknums⊔𝕩
+}
+
+Prep1Proc←{ # Prepare one step of procedure
+  # Converts "move 3 from 1 to 3" into [⟨1,3⟩,⟨1,3⟩,⟨1,3⟩].
+  ⟨n,f,t⟩←•ParseFloat¨⟨1,3,5⟩⊏(' '=𝕩)Split𝕩
+  ⟨n⟩/[⟨f,t⟩]
+}
+
+Prep←{
+  ⟨rawmap, rawproc⟩←(""⊸≡¨𝕩)Split𝕩
+  map0←{(𝕩≠' ')/𝕩}¨<˘⍉⌽>¯1↓rawmap
+  map1←⟨""⟩∾(1=4|↕≠map0)/map0
+  proc←∾Prep1Proc¨rawproc
+  ⟨map1, proc⟩
+}
+
+•Show Prep •file.Lines ⊑•args