expenditure problem solved

.gitignore

@@ -0,0 +1 @@
+/node_modules

01-js/easy/anagram.js

@@ -8,7 +8,13 @@
 */
 
 function isAnagram(str1, str2) {
+
+  let a = str1.toLowerCase().split("").sort().join("")
+  let b = str2.toLowerCase().split("").sort().join("")
+
+  return (a===b ? true:false)
 
 }
 
+
 module.exports = isAnagram;

01-js/easy/expenditure-analysis.js

@@ -8,8 +8,59 @@
   - `npm run test-expenditure-analysis`
 */
 
+const currentDate = new Date()
 function calculateTotalSpentByCategory(transactions) {
-  return [];
+  const categoryItems = {}
+  transactions.forEach((transaction)=>{
+    const category = transaction.category
+    if(!categoryItems[category]){
+      categoryItems[category] = 0
+    }
+    categoryItems[category] += transaction.price
+  })
+  return [categoryItems];
 }
 
-module.exports = calculateTotalSpentByCategory;
+var transactions = [
+  {
+    itemName:'T-shirt',
+    category:'Fashion',
+    price:300,
+    timestamp:currentDate.getTime()
+  },
+  {
+    itemName:'Jeans',
+    category:'Fashion',
+    price:700,
+    timestamp:currentDate.getTime()
+  },
+  {
+    itemName:'Mobile',
+    category:'Gadgets',
+    price:10000,
+    timestamp:currentDate.getTime()
+  },
+  {
+    itemName:'Laptop',
+    category:'Gadgets',
+    price:50000,
+    timestamp:currentDate.getTime()
+  },
+  {
+    itemName:'Biriyani',
+    category:'Food',
+    price:200,
+    timestamp:currentDate.getTime()
+  },
+  {
+    itemName:'Chiken',
+    category:'Food',
+    price:150,
+    timestamp:currentDate.getTime()
+  },
+
+]
+
+console.log(calculateTotalSpentByCategory(transactions))
+
+// module.exports = calculateTotalSpentByCategory;

01-js/easy/test-anagram.test.js

@@ -0,0 +1,23 @@
+const isAnagram = require('./anagram');
+
+describe('isAnagram', () => {
+  it('should return true for anagrams', () => {
+    expect(isAnagram('lion', 'ionl')).toBe(true);
+    expect(isAnagram('listen', 'silent')).toBe(true);
+    expect(isAnagram('acts', 'cats')).toBe(true);
+  });
+
+  it('should return false for non-anagrams', () => {
+    expect(isAnagram('hello', 'world')).toBe(false);
+    expect(isAnagram('apple', 'banana')).toBe(false);
+    expect(isAnagram('abc', 'abcd')).toBe(false);
+  });
+
+  it('should be case-insensitive', () => {
+    expect(isAnagram('LiOn', 'IoNl')).toBe(true);
+  });
+
+  it('should work with empty strings', () => {
+    expect(isAnagram('', '')).toBe(true);
+  });
+});

01-js/medium/palindrome.js

@@ -7,7 +7,12 @@
 */
 
 function isPalindrome(str) {
-  return true;
+  const reverseStr = str.toLowerCase().split('').reverse().join('');
+  if (str.toLowerCase() === reverseStr) {
+    return true;
+  }
 }
 
+console.log(isPalindrome("Nayan"))
+
 module.exports = isPalindrome;

01-js/medium/times.js

@@ -7,6 +7,17 @@ Try running it for
 Hint - use Date class exposed in JS
 */
 
+const s = new Date();
 function calculateTime(n) {
-    return 0.01;
-}
+    let start = new Date().getTime();
+    let sum = 0;
+    for (let i = 1; i <= n; i++) {
+        sum += i;
+    }
+    //   console.log(sum);
+    let end = new Date().getTime();
+    let time = (end - start) / 1000;
+    return time;
+}
+
+console.log(calculateTime(100000))