Update Class 2 Exercises and Homework.js

Class 2 Exercises and Homework.js

@@ -5,22 +5,50 @@
 // - 'favorite food'
 // - bestFriend (object with the same 3 properties as above)
 
+let person = {firstName: "Yuhong",
+              lastName: "Wang",
+              "favorite food": "pasta",
+              bestFriend: {firstName: "Jenny", lastName: "Smith", "favorite food": "pizza"}};
+console.log(person) 
+// result is as follows:
+//{firstName: 'Yuhong', lastName: 'Wang', favorite food: 'pasta', bestFriend: {…}}
+//bestFriend: {firstName: 'Jenny', lastName: 'Smith', favorite food: 'pizza'}
+//favorite food: "pasta"
+//firstName: "Yuhong"
+//lastName: "Wang"
 
 // 2. console.log best friend's firstName and your favorite food
-
+console.log(person.bestFriend.firstName) // result: Jenny
+console.log(person["favorite food"]) //result: pasta
 
 // 3. Create an array to represent this tic-tac-toe board
 // -O-
 // -XO
 // X-X
 
+let arrTicTacToe = [["_", "O", "_"], ["_", "X", "O"], ["X", "_", "X"]];
+arrTicTacToe
+//result is as follows:
+//(3) [Array(3), Array(3), Array(3)]
+//0: (3) ['_', 'O', '_']
+//1: (3) ['_', 'X', 'O']
+//2: (3) ['X', '_', 'X']
 
+length: 3
 // 4. After the array is created, 'O' claims the top right square.
 // Update that value.
+arrTicTacToe[0][2] = "O"
 
 
 // 5. Log the grid to the console.
-
+console.log(arrTicTacToe)
+//result is as follows:
+//(3) [Array(3), Array(3), Array(3)]
+//0: (3) ['_', 'O', 'O']
+//1: (3) ['_', 'X', 'O']
+//2: (3) ['X', '_', 'X']
+//length: 3
+//[[Prototype]]: Array(0)
 
 // 6. You are given an email as string myEmail, make sure it is in correct email format.
 // Should be 1 or more characters, then @ sign, then 1 or more characters, then dot, then one or more characters - no whitespace
@@ -29,16 +57,31 @@
 // - Use rubular to check a few emails: https://rubular.com/
 // - Use regexp test method https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/test
 
+let regex1 = /^[^\s@]+@[^\s@]+\.[^\s@]+$/
+regex1.test("a@b.com") //result is: true
 
 // 7. You are given an assignmentDate as a string in the format "month/day/year"
 // i.e. '1/21/2019' - but this could be any date.
 // Convert this string to a Date
 const assignmentDate = '1/21/2019';
-
+function convertToDate(dateString) {
+  //  Convert a "dd/MM/yyyy" string into a Date object
+  let d = dateString.split("/");
+  let dat = new Date(d[2], d[0] - 1, d[1]);
+  return dat;     
+}
+//function call
+convertToDate(assignmentDate) //result is: Wed Jan 29 2020 00:00:00 GMT-0800 (Pacific Standard Time)
 
 // 8. Create a new Date instance to represent the dueDate.  
 // This will be exactly 7 days after the assignment date.
-
+function getDueDate (assignmentDate) {
+  let date = convertToDate(assignmentDate);
+  date = new Date(date.getTime()+(7*24*60*60*1000));
+  return date;
+}
+//function call
+let dueDate = getDueDate('1/21/2020') //result is: Tue Jan 28 2020 00:00:00 GMT-0800 (Pacific Standard Time)
 
 // 9. Use dueDate values to create an HTML time tag in format
 // <time datetime="YYYY-MM-DD">Month day, year</time>
@@ -57,6 +100,16 @@ const months = [
   'November',
   'December'
 ];
+function getFormattedDate(date) {
+  let year = date.getFullYear();
+  let month = (1 + date.getMonth()).toString().padStart(2, '0');
+  let day = date.getDate().toString().padStart(2, '0');
+
+  return `${year}-${month}-${day}`;
+}
 
+let htmlStr = `<time datetime="${getFormattedDate(dueDate)}">${months[dueDate.getMonth()]} ${dueDate.getDate()}, ${dueDate.getYear() + 1900}</time>` 
+//result above is: '<time datetime="2020-01-28">January 28, 2020</time>'
 
 // 10. log this value using console.log
+console.log(htmlStr) //result is: <time datetime="2020-01-28">January 28, 2020</time>