--update: added Array chunk generation problem

Author: ashokdey

Diff for: src/anagrams/anagrams.test.js

@@ -0,0 +1,39 @@
+const { checkAnagrams } = require('.');
+
+describe('Anagrams', () => {
+  it('Should return TRUE for `rail safety` & `fairy tales`', () => {
+    expect(
+      checkAnagrams({
+        firstString: 'rail safety',
+        secondString: 'fairy tales',
+      }),
+    ).toBe(true);
+  });
+
+  it('Should return TRUE for `FAIRY tales` & `rail SAFETY`', () => {
+    expect(
+      checkAnagrams({
+        firstString: 'FAIRY tales',
+        secondString: 'rail SAFETY',
+      }),
+    ).toBe(true);
+  });
+
+  it('Should return FALSE for `Hello World` & `Bye`', () => {
+    expect(
+      checkAnagrams({
+        firstString: 'Hello World',
+        secondString: 'Bye',
+      }),
+    ).toBe(false);
+  });
+
+  it('Should ignore special characters', () => {
+    expect(
+      checkAnagrams({
+        firstString: 'hello world!!',
+        secondString: 'hello  -  world',
+      }),
+    ).toBe(true);
+  });
+});

Diff for: src/anagrams/index.js

@@ -0,0 +1,36 @@
+function createCharMap(str) {
+  const charMap = {};
+  const sanitizedString = str.replace(/[^\w]/g, '').toLowerCase();
+  sanitizedString.split('').forEach((char) => {
+    if (!charMap[char]) {
+      charMap[char] = 1;
+    } else {
+      charMap[char] += 1;
+    }
+    return 0;
+  });
+  return charMap;
+}
+
+function checkAnagrams({ firstString, secondString }) {
+  const charMapFirst = createCharMap(firstString);
+  const charMapSecond = createCharMap(secondString);
+
+  if (Object.keys(charMapFirst).length !== Object.keys(charMapSecond).length) {
+    return false;
+  }
+
+  // eslint-disable-next-line no-restricted-syntax
+  for (const char in charMapFirst) {
+    if (charMapFirst[char] !== charMapSecond[char]) {
+      return false;
+    }
+  }
+
+  return true;
+}
+
+module.exports = {
+  checkAnagrams,
+  createCharMap,
+};