I have an array var words = []//lots of different words in it. I have a Math.floor(Math.random()*words.length) that chooses a random word from the array. This is run in a loop that runs for a random number of times (between 2 and 200 times). I would like to make sure that the random numbers do not get chosen more than once during the tim...
Given the desired number of partitions, the partitions should be nearly equal in size. This question handles the problem for a list. They do not have the random property, but that is easily added. My problem is, that I have an iterator as input, so shuffle does not apply. The reason for that is that I want to randomly partition the nodes...
I have an embedded system. What I would like for it to do when it powers up or otherwise resets, is to generate a unique ID, so that on different restarts a different unique ID is generated with high probability. It does not have access to a real-time clock, but it does have access to an ADC and a UART. I am wondering if there is a dece...
Hi all, Im pretty new to Haskell. I have a datatype: data Sentence= Prop Int | No Sentence | And [Sentence] | Or [Sentence] deriving Eq I already wrote a Show instance for it However, whether it makes sense or not, I would like to be able to generate a random Sentence. How can i accomplish this...
I would like to load a random document out of a set of documents stored in a CouchDB database. The method for picking and loading the document should conform to the following requirements: Efficiency: The lookup of the document should be efficient, most importantly the time to load the document must not grow linearly with the total num...
i have to generate random numbers for 3 different cases. i. 1 dice ii. a pair of dice iii. 3 dices my questions: 1. please suggest me sm good logic to generate random numbers for all the 3 cases. 2. does the logic change when i consider the cses of 2 dices, rather than 1? 3.how much of an effect does the range in which we have to genrate...
I have a list of items for businesses in a database: listings `id` `location` `item` `status` So in the database I might have something like: 19 Loc A Green Beans for $12 active 20 Loc B Two Gatoraids for $3 deactive 21 Loc A Ham for $2 per lb active 22 Loc A Pepsi 2 for $2 active 23 Loc C House pla...
I would like to create just one random number but instead a new random number is being made every time the button is clicked. Where should i put the random number declaration so that it only creates one random number? ...
Let's say I have a list of colours, colours = ['red', 'blue', 'green', 'purple']. I then wish to call this python function that I hope exists, random_object = random_choice(colours). Now, if random_object holds 'blue', I hope colours = ['red', 'green', 'purple']. Does such a function exist in python? ...
Hey guys, I've got a class that represents a coin, which can be flipped with the Coin.Flip() method. Flip() uses random.Next(2); to get either a 0 or a 1 representing heads or tails. This works good.. sort of. For the program, I need to have 2 coins, which I make, lets say coin1 and coin2. coin2 always needs to be flipped straight aft...
I use this function to create random numbers between 100000000 and 999999999 int irand(int start, int stop) { double range = stop - start + 1; return start + (int)(range * rand()/(RAND_MAX+1.0)); } When I use it like this, it's properly working while(1) { DWORD dw = irand(100000000, 999999999); printf("dynamic key: %d\n",...
Generating a random password is easy. but generating a batch is more difficult. public static string getRandomPassword(int letters, int getallen) { //int letters = 8; //int getallen = 5; char[] letterdeel = new char[letters]; int minGetal = (int)Math.Pow(10, getallen - 1); int maxGetal = (int...
I'd like to produce fast random shuffles repeatedly with minimal bias. It's known that the Fisher-Yates shuffle is unbiased as long as the underlying random number generator (RNG) is unbiased. To shuffle an array a of n elements: for i from n − 1 downto 1 do j ← random integer with 0 ≤ j ≤ i exchange a[j] and a[i] But...
I've been fiddling around with CHESS, which seems like an incredibly useful tool. However, ironically, I seem to be dealing with a Heisenbug in one of my test methods. The results reported by CHESS when I run this test are unpredictable: Sometimes the test will pass Sometimes the test will fail, with no further description (simply: "Te...
Hi, I was wondering if someone could point me in the right direction for this: I have a MySQL database with and id and a text string, i want to be able to display it, and with the click of a button display another random phrase without having to refresh the whole page. I have look quite thoroughly and have no found no answer for this ...
Possible Duplicate: True random number generator I was talking to a friend the other day and we were trying to figure out if it is possible to generate completely random numbers without the help of a random function? In C for example "rand" generates pseudo-random numbers. Or we can use something like "srand( time( NULL ) );...
It's all in the title. ...
Hi, How can I recreate this type movement with jquery for images: http://www.istockphoto.com/stock-video-12805249-moving-particles-loop-soft-green-hd-1080.php I'm planning to use it as a web page background. If it is not possible with jquery I'll go with flash as3. But I prefer jquery. ...
Hey guys, I was trying to use a random number generator in a windows forms app, but I'm having trouble figuring out where to put it. I'm being told "place it in the form constructor" but I don't think we're talking the same language. Here's the code im trying to find a home for: Random rnd = new Random(); int guessMe = rnd.Next(0,100);...
I have a sorted set (std::set to be precise) that contains elements with an assigned weight. I want to randomly choose N elements from this set, while the elements with higher weight should have a bigger probability of being chosen. Any element can be chosen multiple times. I want to do this as efficiently as possible - I want to avoid ...