Update anagram.js

01-js/easy/anagram.js

@@ -7,8 +7,123 @@
   - `npm run test-anagram`
 */
 
-function isAnagram(str1, str2) {
 
+/*
+  Write a function `isAnagram` which takes 2 parameters and returns true/false if those are anagrams or not.
+  What's Anagram?
+  - A word, phrase, or name formed by rearranging the letters of another, such as spar, formed from rasp.
+
+  Once you've implemented the logic, test your code by running
+  - `npm run test-anagram`
+*/
+
+
+
+// Function to calculate the frequency of characters in a string
+function frequencyOfString(str) {
+  let frequencyOfChars = {};
+  for (let i = 0; i < str.length; i++) {
+    let char = str[i];
+    frequencyOfChars[char] = (frequencyOfChars[char] || 0) + 1;
+  }
+  return frequencyOfChars;
 }
 
+// Function to compare the frequency of characters in 2 strings
+function compareStrings(str1, str2) {
+  let frequency1 = frequencyOfString(str1);
+  let frequency2 = frequencyOfString(str2);
+
+  let chars1 = Object.keys(frequency1);
+  let chars2 = Object.keys(frequency2);
+
+  for (let i = 0; i < chars1.length; i++) {
+    let char = chars1[i];
+    if (frequency1[char] !== frequency2[char]) {
+      return false;
+    }
+  }
+  return true;
+}
+
+// Function to check if 2 strings are anagrams using a different approach
+function checkAnagram(str1, str2) {
+  str1 = str1.toLowerCase().replace(/ /g, "");
+  str2 = str2.toLowerCase().replace(/ /g, "");
+
+  if (str1.length !== str2.length) {
+    return false;
+  }
+
+  let compareResult = compareStrings(str1, str2);
+  return compareResult;
+}
+
+// Function to convert a string to a sorted format
+function convertString(str) {
+  str = str.toLowerCase();
+  let charArray = str.split('');
+  let sortedArray = charArray.sort();
+  let resultString = sortedArray.join('');
+  return resultString;
+}
+
+// Function to check if 2 strings are anagrams using a different approach
+function checkAnagramAlternative(str1, str2) {
+  if (convertString(str1) === convertString(str2)) {
+    return true;
+  } else {
+    return false;
+  }
+}
+
+// Function to validate if input is a non-empty string
+function validateString(str) {
+  if (typeof str !== 'string') {
+    throw new Error('Input should be a string');
+  }
+
+  if (str.trim().length === 0) {
+    return {};
+  }
+
+  return str;
+}
+
+// Function to determine if 2 strings are anagrams using both approaches
+function result(str1, str2) {
+  // creating issue with test cases if i includes edge cases
+  // const validatedStr1 = validateString(str1);
+  // const validatedStr2 = validateString(str2);
+
+
+  let validatedStr1 = str1;
+  let validatedStr2 = str2;
+
+  // Check anagram using alternative approach or regular approach
+  if (checkAnagramAlternative(validatedStr1, validatedStr2) && checkAnagram(validatedStr1, validatedStr2)) {
+    return true;
+  } else {
+    return false;
+  }
+}
+
+// Main function to determine if 2 strings are anagrams
+function isAnagram(str1, str2) {
+  return result(str1, str2);
+}
+
+// Export the isAnagram function for use in other modules
 module.exports = isAnagram;
+
+// Test cases 
+/*
+console.log(isAnagram('openai', 'aiopen'));
+console.log(isAnagram('hello', 'world'));
+*/
+
+
+
+
+
+