http://www.scirra.com/forum/ This is an XML content feed of; Scirra Forum : How do I....? : Randomize Array Copyright (c) 2006-2011 Web Wiz Forums - All Rights Reserved. Wed, 19 Jun 2013 06:15:30 +0000 Fri, 27 Apr 2012 05:53:20 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 10.01 360 www.scirra.com/forum/RSS_post_feed.asp?TID=51469 http://www.scirra.com/forum/forum_images/web_wiz_forums.png http://www.scirra.com/forum/ http://www.scirra.com/forum/randomize-array_topic51469_post324815.html#324815 Author: tnewhook
Subject: 51469
Posted: 27 Apr 2012 at 5:53am

@kittiewan - ya, I figured that out about the tries variable. BTW, your Memory Match Tutorial is great! :)]]> Fri, 27 Apr 2012 05:53:20 +0000 http://www.scirra.com/forum/randomize-array_topic51469.html http://www.scirra.com/forum/randomize-array_topic51469_post324669.html#324669 Author: kittiewan
Subject: 51469
Posted: 26 Apr 2012 at 2:44pm

Yes, it keeps trying.

The key is that you only add to the variable i if the random value is not in the array.

That way, as long as i is less than the desired number of random numbers in the array, it keeps trying.

The variable Tries isn't really necessary to make it work. It is there just to show you how many times it had to loop to get the desired number of unique values. Say you are trying to generate 4 variables (the width of the array). If Tries=10 that means you had to loop 10 times to get 4 unique values.]]> Thu, 26 Apr 2012 14:44:08 +0000 http://www.scirra.com/forum/randomize-array_topic51469.html http://www.scirra.com/forum/randomize-array_topic51469_post324602.html#324602 Author: tnewhook
Subject: 51469
Posted: 26 Apr 2012 at 3:58am

@kittiewan - As I'm looking at the code again, I had one question: In step 3, you have a test to see if the array already contains that random number. If the test fails, how does the program know how to handle it? Does it simply retry until it can pass the test. I'm not sure how the statement inside is the loop is handled logically.

Thanks again for your help.]]> Thu, 26 Apr 2012 03:58:29 +0000 http://www.scirra.com/forum/randomize-array_topic51469.html http://www.scirra.com/forum/randomize-array_topic51469_post324596.html#324596 Author: tnewhook
Subject: 51469
Posted: 26 Apr 2012 at 3:14am

Thanks guys (and girls) - I really appreciate it.

@kittiewan - that was just what I needed - much more elegant than my solution. I didn't know I could compare a variable to all elements in an array.

@daveryaaziem - I've seen that plugin, but I can't modify the size of the array at runtime. Thanks, tho :)]]> Thu, 26 Apr 2012 03:14:17 +0000 http://www.scirra.com/forum/randomize-array_topic51469.html http://www.scirra.com/forum/randomize-array_topic51469_post324590.html#324590 Author: kittiewan
Subject: 51469
Posted: 26 Apr 2012 at 1:21am

As of C2 Release 87 there are two features that make this easy: While loop and a feature to test if a value is in the array. This isn't your example, but I think it does what you were asking about. Tries shown are the number of times a random number was generated. If it is bigger than the array width, then there were duplicates among the numbers generated, and so a new random number was generated.

RandomArrayNoDuplicates.capx]]> Thu, 26 Apr 2012 01:21:35 +0000 http://www.scirra.com/forum/randomize-array_topic51469.html http://www.scirra.com/forum/randomize-array_topic51469_post324515.html#324515 Author: daveryaaziem
Subject: 51469
Posted: 25 Apr 2012 at 4:24pm

Hey tnewhook,

You might wanna check out a third party plugin developed by joe7 called random array, I think it will do what you need it to do. I use it on several of my games and it works great. Here's a link:

http://www.scirra.com/forum/plugin-randomarray_topic45277.html

cheers]]> Wed, 25 Apr 2012 16:24:47 +0000 http://www.scirra.com/forum/randomize-array_topic51469.html http://www.scirra.com/forum/randomize-array_topic51469_post324448.html#324448 Author: tnewhook
Subject: 51469
Posted: 25 Apr 2012 at 8:11am

I'm trying to create an array with one particular element, and 3 other random elements. There's some checking for duplicates that I'm not doing right, but I haven't been able to debug it. If you refresh the page enough times, some elements will be duplicates. Any suggestions on making this process faster, shorter, better algorithm, etc. would also be appreciated. Thanks in advance, and God bless

http://db.tt/aF4lluvw]]> Wed, 25 Apr 2012 08:11:03 +0000 http://www.scirra.com/forum/randomize-array_topic51469.html