1 00:00:00,210 --> 00:00:05,010 Within this lesson, we are randomizing the contents of an array and then we're going to be returning 2 00:00:05,010 --> 00:00:12,600 back that array, newly, freshly created array that we are building out, we created a function already 3 00:00:12,600 --> 00:00:15,900 called random array, and it's expecting an argument. 4 00:00:16,050 --> 00:00:19,800 And that argument that it's expecting is an array that gets passed in there. 5 00:00:20,100 --> 00:00:27,600 So now we're going to have our random array and will update this to be random or and then we can output 6 00:00:27,600 --> 00:00:32,960 and console, lagrand this word, the string value that's turned into an array. 7 00:00:32,970 --> 00:00:38,320 We can see that here in the right hand side in the console, reorganize the contents of the array. 8 00:00:38,430 --> 00:00:45,240 Let's set up our loop to loop through the contents of the array, set up a variable called AI and we're 9 00:00:45,240 --> 00:00:53,340 going to equal AI to the value of our array length, subtracting one quasar array length. 10 00:00:53,370 --> 00:00:56,880 So now we get the index values of the items in the array. 11 00:00:57,040 --> 00:01:01,890 Thus we need to subtract one and we're going to loop through while AI is less than zero. 12 00:01:02,250 --> 00:01:08,280 So once it hits zero, then that's where once it goes below zero, then that's where we stop the loop. 13 00:01:09,000 --> 00:01:14,940 And as long as I is above zero and that means that we need to decrease the value of AI. 14 00:01:15,090 --> 00:01:19,350 So a lot of the loops that we've done before are going to be increasing and in this case we're going 15 00:01:19,350 --> 00:01:20,900 to be decreasing that value. 16 00:01:22,540 --> 00:01:28,750 And we're also going to need to set up a temporary value for that item within the array so that we can 17 00:01:28,750 --> 00:01:35,120 store that and take that out and then store that as a new value as we build out the new temporary array. 18 00:01:35,890 --> 00:01:39,940 And for now, what I'll do is I'll consult, logout the value of temp. 19 00:01:40,740 --> 00:01:48,210 We also need to generate a random value, so called that G using what we did before with math flaw, 20 00:01:48,480 --> 00:01:54,240 that we're going to multiply it by whatever the value of AI is plus one. 21 00:01:54,480 --> 00:02:02,220 And remember, AI is decreasing in value as we're iterating through and a at the values of AI as well. 22 00:02:02,400 --> 00:02:07,220 And we'll consult log out the value of G so that we can see everything that's happening here. 23 00:02:07,620 --> 00:02:14,760 So as we Head Start, start out with the last letter and as we loop through and iterate through, AI 24 00:02:14,760 --> 00:02:21,330 is decreasing in value and we're also getting our random different value every time we're decreasing. 25 00:02:21,450 --> 00:02:24,720 So we can try that one more time and you can see that temp. 26 00:02:24,840 --> 00:02:27,450 So that temp is the letter that we're on. 27 00:02:27,810 --> 00:02:31,200 AI is the current index value that we're looking at. 28 00:02:31,230 --> 00:02:32,550 So that's what we're getting E from. 29 00:02:32,790 --> 00:02:38,420 And then G is the new random index value that we want to add into the array. 30 00:02:38,670 --> 00:02:40,890 So let's build out our new array. 31 00:02:42,860 --> 00:02:48,080 And we're just swapping the order between the two different items in the array, so we're taking the 32 00:02:48,080 --> 00:02:55,520 value of I and in this case, we're going to take E and we're going to equal E to whatever the value 33 00:02:55,520 --> 00:02:57,280 of J is. 34 00:02:57,290 --> 00:03:00,380 And in this case, it would be the second item in the index. 35 00:03:01,700 --> 00:03:09,380 So we're equaling those and then we're taking the value of J and we're equaling it to the value of temp. 36 00:03:09,680 --> 00:03:16,310 So basically we're doing a quick swap over of these characters as we're iterating through, and that's 37 00:03:16,310 --> 00:03:21,560 swapping around of the order of the characters is going to reorganize that current array. 38 00:03:21,740 --> 00:03:25,430 And then lastly, what we're going to do is we're going to return that array. 39 00:03:25,730 --> 00:03:29,020 And I would put that as a return value. 40 00:03:29,330 --> 00:03:31,220 So let's try that out and hit start. 41 00:03:31,460 --> 00:03:37,190 And you can see that now we've got a reorganized sorting of the contents of that array. 42 00:03:37,490 --> 00:03:43,160 And so this is a website and we've reorganized the items in the array and now it's just a matter of 43 00:03:43,160 --> 00:03:45,500 turning it back into a string value. 44 00:03:45,710 --> 00:03:50,140 So right now, we're getting a return to value and we can use joint. 45 00:03:50,210 --> 00:03:53,570 So we're joining it together with that's double two double quotes. 46 00:03:53,580 --> 00:04:00,230 And now when we refresh, we hit start and we get a scrambled version of whatever word was sent into 47 00:04:00,230 --> 00:04:03,790 the scrambler and this randomising of the array order. 48 00:04:04,010 --> 00:04:08,640 This is a function that I used very often was in a lot of different applications. 49 00:04:08,640 --> 00:04:14,630 So it's a very useful function, creating a random value and then swapping it with whatever that randomized 50 00:04:14,630 --> 00:04:15,470 item was. 51 00:04:15,650 --> 00:04:21,380 And it's doing it whatever number of characters we have in the array, essentially reorganizing the 52 00:04:21,380 --> 00:04:22,240 array content. 53 00:04:22,520 --> 00:04:24,380 So go ahead and try this out for yourself. 54 00:04:24,560 --> 00:04:29,690 Add in the ability to randomize the order of an array and that's going to move us along to the next 55 00:04:29,690 --> 00:04:35,090 step where we're almost ready to output that word to the player so that they can start guessing what 56 00:04:35,090 --> 00:04:36,820 the word is that we've generated. 57 00:04:37,100 --> 00:04:38,300 So go ahead and give it a try.