Completed-week3

01-js/easy/anagram.js

@@ -6,6 +6,15 @@
 
 function isAnagram(str1, str2) {
 
-}
+  let newStr1= str1.toLowerCase().split("").sort().join("");
+  let newStr2= str2.toLowerCase().split("").sort().join("");
+  if(newStr1===newStr2){
+    return true;
+  }
+  else{
+    return false;
+  }
 
+}
+isAnagram("showkat", "akwohst")
 module.exports = isAnagram;

01-js/easy/expenditure-analysis.js

@@ -14,7 +14,8 @@
 */
 
 function calculateTotalSpentByCategory(transactions) {
-  return [];
+  const categoryTotals = {};
+
 }
 
 module.exports = calculateTotalSpentByCategory;

01-js/easy/findLargestElement.js

@@ -5,8 +5,13 @@
   - Output: 9
 */
 
+
 function findLargestElement(numbers) {
-
+    if(numbers.length==0){
+        return undefined;
+    }
+    let highest = Math.max(...numbers);
+    return highest;
 }
 
 module.exports = findLargestElement;

01-js/hard/calculator.js

@@ -15,7 +15,40 @@
 
   Once you've implemented the logic, test your code by running
 */
+const math = require("mathjs")
 
-class Calculator {}
+class Calculator {
+  constructor (){
+    this.result =0;
+  }
+  add(n){
+    this.result = this.result + n
+  }
+  subtract (n){
+    this.result = this.result - n
+  }
+  multiply (n){
+    this.result = this.result * n
+  }
+  divide(n){
+    if (n == 0){
+      throw new Error("its undefined")
+    } else {
+      this.result = this.result / parseFloat(n)
+    }
+  }
+  clear (){
+    this.result = 0
+  }
+  getResult (){
+    return this.result
+  }
+  calculate (str){
+    this.result= math.evaluate(str)
+    if (this.result== Infinity){
+      throw new Error("invalid expression")
+    }
+  }
+}
 
 module.exports = Calculator;

01-js/hard/todo-list.js

@@ -11,7 +11,41 @@
 */
 
 class Todo {
+  constructor(todos){
+    this.todos = [];
+  }
 
+  add(todo){
+    this.todos.push(todo)
+  }
+
+  remove(index){
+    if(index>= 0 && index<this.todos.length){
+    this.todos.splice(index, 1);
+    }
+  }
+
+  update(index, newTodo){
+    if(index>= 0 && index<this.todos.length){
+    this.todos[index] = newTodo
+    }
+  }
+
+  getAll(){
+    return this.todos
+  }
+
+  get(index){
+    if(index>= 0 && index<this.todos.length){
+    return this.todos[index]
+    } else{
+      return null
+    }
+  }
+
+  clear(){
+    this.todos.length = 0
+  }
 }
 
 module.exports = Todo;

01-js/medium/countVowels.js

@@ -6,7 +6,20 @@
 */
 
 function countVowels(str) {
-    // Your code here
+  // to count vowels 
+  let noofvows =0;
+  // converting string into array for iteration and making it lowercase for case-sensitivity
+   let arrified = str.toLowerCase().split("");
+   // iterating over array 
+   for(let i=0; i<arrified.length; i++){
+    // checking if the string contains aeiou
+    if(arrified[i]== "a" || arrified[i]=="e" ||arrified[i] =="i" ||arrified[i]== "o" || arrified[i]=="u"){
+      // then add 1 to noofvows which was initiated with 0
+      noofvows= noofvows + 1;
+    }
+   }
+   // returning the no of vowels 
+   return noofvows;
 }
 
 module.exports = countVowels;

01-js/medium/palindrome.js

@@ -4,7 +4,14 @@
 */
 
 function isPalindrome(str) {
+  let str1= str.toLowerCase().replace(/[^a-z0-9]/g, "");
+  let str2 = str.toLowerCase().split("").reverse().join("").replace(/[^a-z0-9]/g, "");
+  if(str1 == str2){
   return true;
+  }
+  else{
+    return false;
+  }
 }
 
 module.exports = isPalindrome;

01-js/medium/times.js

@@ -9,5 +9,14 @@ There is no automated test for this one, this is more for you to understand time
 */
 
 function calculateTime(n) {
-    return 0.01;
-}
+    let before =new Date().getTime();
+    for(let i=0; i<n; i++){
+        let sum = 0;
+        sum = sum + i;
+    }
+    let after = new Date().getTime();
+    let timeItTook= (after - before)/1000;
+    return timeItTook;
+}
+
+console.log(calculateTime(1000000))

01-js/package.json

@@ -8,5 +8,8 @@
   },
   "keywords": [],
   "author": "",
-  "license": "ISC"
+  "license": "ISC",
+  "dependencies": {
+    "mathjs": "^13.2.0"
+  }
 }

week-2/01-async-js/easy/1-counter.md

@@ -1,4 +1,21 @@
 ## Create a counter in JavaScript
 
 We have already covered this in the second lesson, but as an easy recap try to code a counter in Javascript
-It should go up as time goes by in intervals of 1 second
+It should go up as time goes by in intervals of 1 second.
+
+
+let count = 0
+
+console.log(count)
+
+function counter() {
+    let countt = setInterval(() => {
+        console.log(++count)
+        if (count >= 10) {
+            clearInterval(countt)
+        }   
+    }, 1000)
+}
+
+
+counter()