From 52049d278763da0f8d6c33cf6a8019731f35dfe4 Mon Sep 17 00:00:00 2001
From: Ben Harris <bjh21@bjh21.me.uk>
Date: Tue, 7 May 2024 09:14:37 +0100
Subject: [PATCH] 07a trivial CLI that can cd

---
 07/07a.bqn | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
 create mode 100644 07/07a.bqn

diff --git a/07/07a.bqn b/07/07a.bqn
new file mode 100644
index 0000000..7d09dca
--- /dev/null
+++ b/07/07a.bqn
@@ -0,0 +1,16 @@
+Split←{
+  blocknums ← +`𝕨
+  # Set entries in blocknums to -1 when they correspond with delimiters.
+  blocknums ↩ (¯1¨)⌾(𝕨⊸/) blocknums
+  blocknums⊔𝕩
+}
+
+FS←{𝕤
+  cwd←⟨⟩
+  Exec⇐{
+    𝕊⟨"cd", "/"⟩:  cwd↩⟨⟩;
+    𝕊⟨"cd", ".."⟩: cwd 1⊸↓↩;
+    𝕊⟨"cd", dir⟩:  cwd ⟨dir⟩⊸∾↩
+  }
+  Cmd⇐{Exec (' '=𝕩)Split𝕩}
+}
-- 
2.30.2