From 2a5e033b2d8882f50f2bfe4da25906c57f2a41f0 Mon Sep 17 00:00:00 2001
From: "H.J" <thechairman@thechairman.info>
Date: Thu, 7 Mar 2024 15:50:04 -0500
Subject: CodingQuest days 3 and 4 in Gleam

---
 codingquest2024/src/day3/solution.gleam | 50 +++++++++++++++++++++++++++++++++
 1 file changed, 50 insertions(+)
 create mode 100644 codingquest2024/src/day3/solution.gleam

(limited to 'codingquest2024/src/day3/solution.gleam')

diff --git a/codingquest2024/src/day3/solution.gleam b/codingquest2024/src/day3/solution.gleam
new file mode 100644
index 0000000..6314060
--- /dev/null
+++ b/codingquest2024/src/day3/solution.gleam
@@ -0,0 +1,50 @@
+import gleam/bit_array
+import gleam/int
+import gleam/io
+import gleam/string
+import gleam/string_builder.{type StringBuilder}
+import simplifile
+
+pub fn main() {
+  let assert Ok(data) = simplifile.read(from: "./src/day3/data.txt")
+
+  data
+  |> string.split(" ")
+  |> build_flat_image(" ", string_builder.new())
+  |> bit_array.from_string()
+  |> print_next_slice()
+}
+
+fn build_flat_image(
+  nums: List(String),
+  pixel: String,
+  acc: StringBuilder,
+) -> String {
+  case nums {
+    [] -> string_builder.to_string(acc)
+    [h, ..t] -> {
+      let assert Ok(n) = int.parse(h)
+      let pixels = string.repeat(pixel, n)
+      build_flat_image(t, next_pixel(pixel), string_builder.append(acc, pixels))
+    }
+  }
+}
+
+fn print_next_slice(str: BitArray) -> Nil {
+  case str {
+    <<slice:bytes-size(100), rest:bytes>> -> {
+      let assert Ok(out) = bit_array.to_string(slice)
+      io.println(out)
+      print_next_slice(rest)
+    }
+    _ -> Nil
+  }
+}
+
+fn next_pixel(p: String) -> String {
+  case p {
+    " " -> "#"
+    "#" -> " "
+    _ -> panic
+  }
+}
-- 
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