Introducing the Practice

[MUSIC] 0:00 Hey everyone, 0:02 Dave here. 0:07 Practice is a good thing. 0:11 It helps make what you’ve learned last longer. 0:12 It also helps you become a faster and better developer. 0:14 So let’s practice some basic JavaScript to make sure your knowledge sticks. 0:17 This practice session covers working with basic array notation and 0:22 methods in JavaScript. 0:25 It's a great follow-up to the second part of the JavaScript Loops, Arrays, and 0:27 Objects course. 0:30 If you haven't taken that yet and find this practice session too difficult, 0:32 then go through that section of the course. 0:35 I've added a link in the teacher's notes. 0:37 You'll work on three different small projects. 0:40 I've attached a work space to this video. 0:42 Go ahead and open it up. 0:44 The first project is defined in the 1_create_array.js file. 0:45 You'll create a basic array, lock some information about the array 0:51 to the console, use various array methods to add and remove array elements. 0:55 And use the join method to print the contents of the array to the console. 1:00 Instructions for this project are in the file, just open the file up and 1:04 follow the step-by-step instructions. 1:08 You'll use the workspace console and node to run your code. 1:10 When you're done, your output for this program should look like this. 1:15 The second project is defined in the 2_loop.js file. 1:22 It asks you to create a function that builds an array of ten random numbers. 1:26 You'll call the function then use a for loop to iterate over the array and 1:32 print out each array item to the console. 1:36 The output of the program should look something like this. 1:39 The last project is described in the 3_deck.js file. 1:50 And it's a big challenge. 1:56 You'll create a function that builds a two-dimensional array, a deck of cards. 1:58 A two dimensional array is an array of arrays. 2:03 That is, it's an array where each value inside is another array. 2:06 This file example_2D_array.js is the array that you'll create. 2:10 Each item in the array is another array made up of two strings, a rank and a suit. 2:17 For example, ace and spades. 2:26 But instead of writing out a little array like this, you'll do it programmatically 2:28 by creating a function that creates this array in just a few lines of code. 2:32 The function will then pass the array to another function which we've provided 2:37 to shuffle the deck. 2:41 Finally, you'll print each card in the array to the console. 2:43 The output of the program will look something like this. 2:46 Now, there's a lot going on in this final project, so 2:54 if you find that it's a bit too much for you, that's okay. 2:57 Try your best, then check out the solution video to see how I did it. 3:00 This is a pretty challenging set of projects. 3:04 If you want to do some quick study before tackling this practice session, 3:07 in the teacher's notes, look for 3:10 links to videos that can help you solve this challenge. 3:11 But if you're ready, go for it. 3:15 Now if you're having trouble, keep at it. 3:17 The more your brain works, the more you'll learn. 3:19 But if you just can't figure out one or more of these, 3:21 jump to the solution videos after this one to see how I programmed my solutions. 3:24