This tag is for questions pertaining to random numbers, whether pseudo random or truly random.

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-2
votes
3answers
95 views

Generating a very long random string of letters

I was trying to fill a file with about ten million random characters (a-z,A-Z,' '). To my surprise the code is extremely slow. I inserted this print ...
0
votes
0answers
22 views

Infinite monkey theorem [closed]

I'm trying to learn python and that's my first programming language.I was reading 'Problem Solving with Algorithms and Data Structures' by Brad Miller and David Ranum, and there was an exercise about ...
3
votes
2answers
54 views

Simple 'Evolution of Text' app

I'm a complete beginner to Python, and wanted to get some feedback on my first app. I tried to make a clone of the 'evolution of text' app found on the Using Python website. Enter some text, and ...
5
votes
2answers
79 views

Monte Carlo simulation of amoeba population

I wrote a simple Python simulation to answer the "Amoeba" population question posed here: A population of amoebas starts with 1. After 1 period that amoeba can divide into 1, 2, 3, or 0 (it can ...
1
vote
0answers
16 views

Password Entropy in Lazarus (Delphi-like)

My today's goal was to create a function, which would evaluate the entropy of a given string password. It's mostly about how random the password is. This little code is based on the C# code from Jeff ...
1
vote
2answers
57 views

Select random row using PDO

What do you think of this way to generate a random number from the total rows in a table? I would like to create a page that random.php precisely generates a random ID and shows it. ...
2
votes
0answers
40 views

PHP Lottery Simulator

I have a lottery simulator on my website that simulates you playing the lottery every week until your death and tells you how much you would have won or lost. It can take a custom number of balls and ...
3
votes
1answer
71 views

Sleeping barber problem in Erlang

I'm learning Erlang. It's my first time with a non-imperative programming language. I've written a code and I want some thoughts about it: Is my logic easy to understand? Is my code idiomatic? Is ...
2
votes
1answer
101 views

C# console roulette game

I made a C# console roulette game. Check it out and give opinions on how to improve or ideas for some other features? It's not finished yet so it has lots of room for improvement. I am very new so ...
3
votes
2answers
53 views

Cryptographically Secure Pin Generator using RNGCryptoServiceProvider

In my system I have a SMS authentication. Users input their user-id and get sent an SMS with a 5 digit pin number they input in a website to log in. The pin has a lifetime of a few minutes. This pin ...
-1
votes
2answers
68 views

Maths quiz with difficulty levels and a score database

How can I make the saving to the dictionaries more efficient as well as making my overall code more efficient? ...
-2
votes
1answer
143 views

On Finding Coin Jams

The problem can be found here and is essentially asking us to generate J many numbers containing N many digits, where these digits have to be either 0 or 1. The catch is that the these numbers that we ...
6
votes
1answer
44 views

Randomly selecting an adjective and noun, combining them into a message

This is my first Rust program. I have previously written a lot of Python, and some C. I would like some advice on whether I am doing things idiomatically, and any improvements I could make! I also ...
5
votes
2answers
70 views

Determine playing card

I would like a code review on the coding I did for my assignment. The reason I have asked here is because my lecturer has no intention of going through (Don't ask me why, I asked before and he said ...
1
vote
3answers
91 views

Distributing cards to players in C++

I have written this program to deal 7 cards to one player. ...
3
votes
1answer
70 views

Generate 6 random numbers for lottery in PHP

This program generates 6 random numbers between 0 and 45 and the numbers cannot be reapeated. Can this code be improved? ...
3
votes
6answers
348 views

Creating an array of random numbers with no duplicates

I only need three random numbers within the range of 1-54 (deck of cards) and none of the three numbers can be a duplicate. I cannot use an ArrayList; I must use a ...
1
vote
1answer
32 views

Using semaphore in C

This is my first time using semaphores and I was wondering if I implemented them to the best of their abilities in my code.... ...
5
votes
1answer
110 views

Generating XKCD passwords

Obviously, everyone should use a password manager to generate and store long unique random strings of characters for the vast majority of their passwords. However, one still needs to memorize a master ...
0
votes
2answers
69 views

Random Walk simulator seems slow, are there ways to optimize my code?

I'm trying to write a short random walk simulator in which an agent has a 50% chance on each "round" to either move toward x or back to its initial position. If the agent is already at its initial ...
3
votes
2answers
166 views

Heightmap generation using midpoint displacement

I am writing a program to generate a height map following the midpoint displacement algorithm (somewhat similar to diamond-square). I'm at the point where I have a recursive program that paints the ...
3
votes
2answers
194 views

“Guess my Number” game in Python (2.7.9)

First time posting to Code Review. Just looking to get some advice on how I can write better code. I found the following exercise for a "Guess my Number" game on DaniWeb, but the linked source code ...
3
votes
1answer
59 views

Portably generate uniformly random floats from mt19937 output

My goal is to generate a sequence of random float from a seeded random generator. The sequence should be the same on any machine / any compiler -- this rules out ...
-2
votes
0answers
25 views

Assigning distinct random numbers to variables [closed]

I'm attempting to generate non repeating random numbers between 1-5, 1-10, 1-20, etc. I'm on to the Fisher-Yates Shuffle but I'm not sure I've implemented it in the best way. My plan is to associate ...
3
votes
1answer
31 views

Python Weighted Object Picker

I've designed a class ObjectPicker that can be given objects and weights. Objects can be picked randomly out of the ...
10
votes
4answers
2k views

Randomly generate spelling mistake in string

My code will generate a spelling mistake inside of a string 50% of the time. It will retrieve a letter from a random index in the string like, "t" and then duplicate that letter like, "tt" and store ...
3
votes
2answers
95 views

Simple function to generate a list of letters

I would like get some suggestions for improvement of this function, and alert me about any dodgy practices that you find. I have been trying to learn python for a short time now and I would like to ...
5
votes
2answers
76 views

Randomized Lighting with Python

I use this to automate the lights in my home while I am away at night (simulating presence). The scheduling of when this runs is handled by my home automation software (Indigo Domotics). I'm open to ...
2
votes
2answers
37 views

Choose a color with probability proportionate to its weight in a group of colors

Input: An array of colors with weights. e.g [['red', 10], ['blue', 20], ['green', 30]] Output: A random color from the array, based on it's proportion to the other ...
2
votes
2answers
59 views

Random positioning and movement of a rabbit on a table

I was inspired by this: If you would put a rabbit randomly on a circular table with radius r= 1 meter and it moves 1 meter in a random direction, what is the chance it won't fall off? I ...
2
votes
1answer
54 views

Sampling with weighted probabilities

In an exam question I need to output some numbers self.random_nums with a certain probability self.probabilities: I have ...
3
votes
2answers
65 views

Adding an 'enemy' to a game (with randomized properties)

I'm working on a game using the now abandoned Famo.us Javascript framework. I have the game in a running prototype and I'm building with Cordova and running it on an iPhone 6 using PhoneGap. There ...
2
votes
2answers
145 views

Beginning dice game

This is my first dice game and I have spent countless hours working on it, yet it is still very basic. I was wondering if anyone could spare the time to suggest improvements. ...
4
votes
2answers
64 views

Normalized random position generator

I place various divs on screen by adding random x and y positions successively normalized with this function. My question is, how well is it written? Can I improve it? If so, then how? I am worried ...
5
votes
1answer
61 views

Creating cover traffic by calling random urls - Javascript loop to decrement float

This is a for-loop which runs once for each step with i>1 and maybe for ...
3
votes
1answer
60 views

Generate voxel terrain with Perlin Noise

For my chunk generator for my game, it currently uses a triple nested loop, which seems very inefficient. It also seems like I could cut down a lot of code in the function somehow. Does anyone have ...
6
votes
4answers
1k views

Random string generator

I decided to make a random string generator for fun, and it works for the most part. Since I'm an amateur at programming, I thought I would post the code to get some feedback on it, and hopefully ...
5
votes
3answers
137 views

Simulation for rolling dice in X-Wing

I've recently started playing the X-Wing Miniature game, and there is quite some math behind some of the dice rolls, as they are affected by many abilities and so on. Manually calculating these is ...
5
votes
1answer
104 views

CIS194: Risk!-style “battles”

After reading LYAH and using RWH as a reference, I've been doing the exercises from CIS194, which is often suggested to beginners on irc://freenode.net/#haskell and ...
1
vote
1answer
39 views

Create a collection of binaries with random set positions

I would like to create a collection of binaries with n set bits and total length should be between n and 31; also those set bits ...
6
votes
2answers
44 views

Creating a list of new areas for patches of conserved land within a watershed

I'm writing code to create a list of new areas for patches of conserved land within a watershed based on the current size distribution of conserved land patches that are in the watershed now. I'm ...
7
votes
2answers
76 views

Simple command-line password generator

I'm very new to Haskell, I've read most of learnyouahaskell.com and played around with some simple things, but this is probably the most 'complicated' bit of Haskell I've written so far. I have an ...
8
votes
2answers
90 views

Random jagged int array generator

I've been working on learning about irregular arrays and thought making a generator such as this one would be a good exercise in applying what I have learned. The following class generates an array ...
1
vote
2answers
82 views

Random uniqueID for each ID SQL

How can I improve this code? I wanted to know if there's a possibility to remove the for loop, and UPDATE a different ...
10
votes
4answers
867 views

Generate set of random numbers and remove lowest

I'm learning some Python with my kids, and we're making a program to generate D & D characters from user input. One portion of the code is to generate stats, which are a set of six numbers where ...
12
votes
4answers
996 views

Rubik's cube timer & scrambler

This uses a linked list to store the data. I used a linked list as it's the only type of data structure that I know currently. Using chrono, I can get microseconds ...
3
votes
1answer
193 views

Function to generate a UUID

I am trying to prevent CSRF for my login page (linked from here), and for this I am going to use a random token generator to create a UUID for the session. The function that I have so far is as such: ...
2
votes
2answers
195 views

C program to generate Seed programs from statically defined Befunge code

My program takes static input, and then number crunches for a few hours. I am currently using Macros, but is there a better, more "user friendly" way to do this without losing on performance. I have ...
5
votes
2answers
268 views

Mapping & Sorting Randomly Generated Numbers

Below is the assignment I was given and the coding is what I have came up with. I would appreciate criticism on how I did and on ways to have gone differently about it. You want to number your ...
6
votes
1answer
295 views

Simple random generator

Based on this question, I have made a simple program to print a sequence of random numbers. The program seems to run fine, but I would like to know if my implementation is correct and how I can ...