feat: maxchar algorithm

Author: francislagares

src/algorithms/maxchar/maxchar.ts

@@ -0,0 +1,18 @@
+export const findMaxChar = (text: string) => {
+  const charMap = {};
+  let max = 0;
+  let maxChar = '';
+
+  for (const char of text) {
+    charMap[char] = charMap[char] + 1 || 1;
+  }
+
+  for (const char in charMap) {
+    if (charMap[char] > max) {
+      max = charMap[char];
+      maxChar = char;
+    }
+  }
+
+  return maxChar;
+};

src/algorithms/maxchar/tests/maxchar.test.ts

@@ -0,0 +1,18 @@
+import { describe, test } from 'vitest';
+
+import { findMaxChar } from '../maxchar';
+
+describe('Maxchar Algorithm', () => {
+  test('maxChar function exists', () => {
+    expect(typeof findMaxChar).toEqual('function');
+  });
+
+  test('Finds the most frequently used char', () => {
+    expect(findMaxChar('a')).toEqual('a');
+    expect(findMaxChar('abcdefghijklmnaaaaa')).toEqual('a');
+  });
+
+  test('Works with numbers in the string', () => {
+    expect(findMaxChar('ab1c1d1e1f1g1')).toEqual('1');
+  });
+});