Week 1 assignment

week-1/Week-1-assignment-with-tests/01-js/easy/anagram.js

@@ -8,7 +8,27 @@
 */
 
 function isAnagram(str1, str2) {
+  ///check if both the strings are of same length
+  ///order it and then use == operator
 
+  if (str1.length != str2.length) {
+    return false;
+  }
+
+  ///There is no direct method to order so,
+  str1 = str1.toLowerCase();
+  str2 = str2.toLowerCase();
+
+
+  ///split the string into array,sort the array then join the array 
+  str1 = str1.split('').sort().join('');
+  str2 = str2.split('').sort().join('');
+
+  if (str1 == str2) {
+    return true;
+  } else {
+    return false;
+  }
 }
 
 module.exports = isAnagram;

week-1/Week-1-assignment-with-tests/01-js/easy/expenditure-analysis.js

@@ -9,7 +9,59 @@
 */
 
 function calculateTotalSpentByCategory(transactions) {
-  return [];
-}
+  // var transactions = [
+  //   {
+  //     id: 1,
+  //     timestamp: 1656076800000,
+  //     price: 10,
+  //     category: 'Food',
+  //     itemName: 'Pizza',
+  //   },
+  //   {
+  //     id: 2,
+  //     timestamp: 1656259600000,
+  //     price: 20,
+  //     category: 'Food',
+  //     itemName: 'Burger',
+  //   },
+  //   {
+  //     id: 3,
+  //     timestamp: 1656019200000,
+  //     price: 15,
+  //     category: 'Clothing',
+  //     itemName: 'T-Shirt',
+  //   },
+  //   {
+  //     id: 4,
+  //     timestamp: 1656364800000,
+  //     price: 30,
+  //     category: 'Electronics',
+  //     itemName: 'Headphones',
+  //   },
+  //   {
+  //     id: 5,
+  //     timestamp: 1656105600000,
+  //     price: 25,
+  //     category: 'Clothing',
+  //     itemName: 'Jeans',
+  //   },
+  // ];
+  ///[returnElement] contains{category: 'Food', totalSpent: 30}
+  var returnElement = [];
+
+  transactions.forEach((traEle) => {
+    ///go through each and every element in transactions
+    var elemen = returnElement.find((ele) => (ele.category === traEle.category));
+    ///check if that element is present
+    if (elemen) {
+      elemen.totalSpent = elemen.totalSpent + traEle.price;
+      returnElement.push({ category: traEle.category, totalSpent: traEle.price });
+    }
+  });
+
 
+
+  return returnElement;
+}
+// calculateTotalSpentByCategory();
 module.exports = calculateTotalSpentByCategory;

week-1/Week-1-assignment-with-tests/01-js/hard/calculator.js

@@ -17,6 +17,40 @@
   - `npm run test-calculator`
 */
 
-class Calculator {}
+class Calculator {
+  constructor() {
+    this.result = 0;
+  }
+  add(addVar) {
+    this.result = this.result + addVar;
+  }
+  subtract(addVar) {
+    this.result = this.result - addVar;
+  }
+  multiply(addVar) {
+    this.result = this.result * addVar;
+  }
+  divide(addVar) {
+    if (addVar <= 0) {
+      throw Error;
+    } else {
+
+      this.result = this.result / addVar;
+    }
+  }
+  clear() {
+    this.result = 0;
+  }
+  getResult() {
+    // console.log(this.result);
+    return this.result;
+  }
+}
+var calc = new Calculator();
+// calc.add(12);
+
+// calc.divide(4);
+// calc.getResult();
+// calc.divide(0);
 
 module.exports = Calculator;

week-1/Week-1-assignment-with-tests/01-js/hard/todo-list.js

@@ -12,7 +12,50 @@
 */
 
 class Todo {
+  constructor() {
+    this.todoList = [];
+  }
+  add(addEle) {
+    this.todoList = [...this.todoList, addEle];
+  }
+  remove(popInIndex) {
+    // if (popInIndex >= this.todoList.length) {
+    //   throw (Error);
+    // } else {
+    this.todoList = this.todoList.slice(0, popInIndex).concat(this.todoList.slice(popInIndex + 1, this.todoList.length));
+    // }
+  }
 
+  update(popInIndex, ele) {
+    // if (popInIndex < 0 || popInIndex >= this.todoList.length) {
+    //   throw (Error);
+    // } else {
+
+    this.todoList[popInIndex] = ele;
+
+    // }
+  }
+
+  getAll() {
+    return this.todoList;
+  }
+
+  get(indexOfTodo) {
+    // if (popInIndex < 0 || popInIndex >= this.todoList.length) {
+    //   throw (Error);
+    // } else {
+    return this.todoList[indexOfTodo + 1];
+
+
+
+    // }
+
+  }
+  clear() {
+    this.todoList = [];
+    return this.todoList;
+
+  }
 }
 
 module.exports = Todo;

week-1/Week-1-assignment-with-tests/01-js/medium/palindrome.js

@@ -7,7 +7,26 @@
 */
 
 function isPalindrome(str) {
-  return true;
+  var isPali = true;
+
+
+  for (var i = 0; i < (str.length) / 2; i++) {
+    if (str[i].toLowerCase() != str[str.length - 1 - i].toLowerCase()) {
+      isPali = false;
+
+    }
+  }
+  if (isPali) {
+
+    return true;
+
+
+  } else {
+    isPali = true;
+
+    return false;
+  }
+
 }
 
 module.exports = isPalindrome;

week-1/Week-1-assignment-with-tests/01-js/medium/times.js

@@ -8,5 +8,16 @@ Hint - use Date class exposed in JS
 */
 
 function calculateTime(n) {
-    return 0.01;
-}
+    var initialSum = 0;
+    ///will get start time
+    const startTime = new Date().getTime();
+    ///lets go through all the elements
+    for (var initial = 0; initial < n; initial++) {
+        initialSum = initialSum + initial;
+    }
+    ///here will get end time
+    const endTime = new Date().getTime();
+    console.log(initialSum);
+    return endTime - startTime;
+
+}   

week-1/Week-1-assignment-with-tests/01-js/package.json

@@ -18,4 +18,4 @@
   "keywords": [],
   "author": "",
   "license": "ISC"
-}
+}

week-1/Week-1-assignment-with-tests/02-async-js/easy/1-counter.js

@@ -0,0 +1,9 @@
+// ## 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
+
+///Here the word "Hello" will be printed every 1 seconds
+setInterval(() => {
+    console.log("Hello")
+}, 1000);

week-1/Week-1-assignment-with-tests/02-async-js/easy/2-counter.js

@@ -0,0 +1,81 @@
+// ## Counter without setInterval
+
+// Without using setInterval, try to code a counter in Javascript. There is a hint at the bottom of the file if you get stuck.
+
+
+///Here we are not using  setInterval but setTimeout ,it will run after 1 seconds
+
+function counter() {
+    console.log("Hello");
+    setTimeout(counter, 1000);
+}
+counter()
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+// (Hint: setTimeout)