Merge pull request #95 from dallinstevens/dallinstevens-day01

Author: dalurness

src/content/communitySolutions/01/dallinstevens.md

@@ -0,0 +1,63 @@
+---
+descriptions: ["deno"]
+---
+
+### 2025 Solution Deno
+
+```Deno
+class LetterCounter {
+  private counts: Map<string, number>;
+
+  constructor() {
+    this.counts = new Map<string, number>();
+  }
+
+  public async processFile(filename: string): Promise<void> {
+    const file = await Deno.open(filename);
+    const buffer = new Uint8Array(1024);
+
+    let leftover = "";
+    let bytesRead: number | null;
+
+    while ((bytesRead = await file.read(buffer)) !== null) {
+      const chunk = leftover + new TextDecoder().decode(buffer.subarray(0, bytesRead));
+      leftover = this.processChunk(chunk);
+    }
+  }
+
+  public printCounts(): void {
+    const sortedCounts = Array.from(this.counts.entries()).sort(([aKey], [bKey]) => {
+      return aKey.localeCompare(bKey, undefined, { numeric: true });
+    });
+
+    for (const [letter, count] of sortedCounts) {
+      console.log(`${letter}: ${count}`);
+    }
+  }
+
+  private processChunk(chunk: string): string {
+    const letters = chunk.split(/\s+/);
+    const leftover = letters.pop() || "";
+    for (const letter of letters) {
+      this.addToCount(letter);
+    }
+    return leftover;
+  }
+    
+  private addToCount(letter: string): void {
+    const currentCount = this.counts.get(letter) || 0;
+    this.counts.set(letter, currentCount + 1);
+  }
+}
+
+if (import.meta.main) {
+  const file = "letters_challenge.txt"
+
+  const myLetterCounter = new LetterCounter();
+
+  await myLetterCounter.processFile(file);
+
+  myLetterCounter.printCounts();
+}
+
+```