From: Ben Harris <bjh21@bjh21.me.uk>
Date: Sat, 4 May 2024 08:39:02 +0000 (+0100)
Subject: 04a done
X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~bjharris/git?a=commitdiff_plain;h=bfe7c3b5934dd7f6a2d0605ceebf39f39c40a89e;p=aoc-2022.git

04a done
---

diff --git a/04/04a.bqn b/04/04a.bqn
new file mode 100644
index 0000000..5f24985
--- /dev/null
+++ b/04/04a.bqn
@@ -0,0 +1,15 @@
+Split←{
+  delims←𝕩∊",-"
+  blocknums ← +`delims
+  # Set entries in blocknums to -1 when they correspond with delims.
+  blocknums ↩ (¯1¨)⌾(delims⊸/) blocknums
+  blocknums⊔𝕩
+}
+
+Prep←{⍉>•ParseFloat¨¨Split¨𝕩}
+
+Main←{𝕊[x0,x1,y0,y1]:
+  +´((x0≤y0)∧(x1≥y1))∨((y0≤x0)∧(y1≥x1))
+}
+
+•Show Main Prep •file.Lines ⊑•args