Questions tagged [random]

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

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3
votes
2answers
68 views

Random alphanumeric string generator function (C, Windows, bcrypt.h)

The function uses the Windows "Cryptography API: Next Generation" (bcrypt.h)'s BCryptGenRandom function to generate ...
3
votes
2answers
61 views

speeding up matrix corruption

I need to randomly erase 33% of the non-zero elements in each line of a matrix. Side note: The end goal is to train a denoising autoencoder to remove this noise. My solution: ...
6
votes
2answers
68 views

My Guessing Game

This is a project that I remade to help me understand function definitions better. It may not be great but I am proud of it. I would love to have you review this project and tell me what I could ...
4
votes
1answer
81 views

Rock, Paper, Scissor - Game

This is my first ever created game. I been slowly but continuously learning PHP for the past 2 months and just last night I thought that I might be able to create a simple and very basic game. Due to ...
3
votes
1answer
65 views

Simple Password Generator Feedback

This is my first major project in F#, looking for any critique on how I can make it more standard or more concise. Some things I feel like I could have done better are the command flag parsing and the ...
4
votes
2answers
95 views

Mini guessing-game

I am a beginner programmer and I would like to improve in coding and develop my skills. That is why I am asking this question, what should I focus on improving in this code ? ...
1
vote
0answers
23 views

Randomly generating invoice IDs

As more fully detailed in my question here, I'm in the process of starting a small, local business and wanted to avoid showing sequential invoice IDs to clients, and instead generate completely random ...
7
votes
2answers
4k views

Generate 6 random numbers for lottery in PHP

This program generates 6 random numbers between 0 and 45 and the numbers cannot be repeated. Can this code be improved? ...
7
votes
2answers
9k views

Roulette game in C++

I'm kind of new to C++ and was just wondering if anyone could give me tips on how I could make my code more efficient (I added some comments to the code to help you understand it better). Is it a ...
1
vote
2answers
64 views

Python - Predicting the probability of 6 Heads or Tails in a row from a set sample size

I'm wondering whether there is a way to make this even more efficient or reduce the number of variables. ...
3
votes
1answer
146 views

Test the hypothesis that the expected number of edges of a random connected graph is \$ O(n \log n) \$

Motivation The most common model for a random graph is the Erdős–Rényi model. However, it does not guarantee the connectedness of the graph. Instead, let's consider the following algorithm (in python-...
3
votes
0answers
48 views

Async generation of large buffers of random numbers on the GPU

I would like to obtain some feedback on a simple code I wrote to implement an easy and hopefully fast way to generate a large number of floats with CURAND and use them one at a time. This is achieved ...
8
votes
2answers
1k views

UEFA Champions League Draw Simulator

I'm new to Python and have written a UEFA Champions League draw simulator. It receives input for 32 teams from 14 countries, and then randomly distributes them into groups of 4, never putting two ...
2
votes
0answers
46 views

Random generation java logic used in Nifi [closed]

I was just reviewing the source code of Nifi, see explanation and public version of the source. This got me wondering whether there are any obvious improvements here to increase the performance of the ...
3
votes
1answer
76 views

Randomizing all class variables in constructor c++

I'm playing around with making random items and decided to implement the following structure. ...
7
votes
2answers
3k views
0
votes
1answer
48 views

C++ Random Tree Node

I've been trying to kind of teach myself "Modern C++" the last couple of months and I just finished this interview type problem and thought it would be a good one to get some feedback on. I not ...
3
votes
2answers
58 views

Universally unique 64 bit long generator

I'm trying to make an ID generator that generates 64 bit longs. The IDs should be globally unique even between two offline machines. This is the same idea as UUID (GUID), but UUID is 128 bit long and ...
4
votes
2answers
94 views

Ising model simulation using metropolis algorithm

I am new to this community; I have tried my best to respect the policy of the community. I have written the Monte Carlo metropolis algorithm for the ising model. I want to optimize the code. I have ...
1
vote
3answers
61 views

high card game implementation

I wanted to write a simple implementation for a high card game. Basically two cards are drawn and the higher one wins. Additional rules: support for multiple decks, if same suits drawn then the ...
26
votes
1answer
3k views

Inverse transform sampling

Inverse transform sampling is a method to generate random values that follow an arbitrary distribution. For some reason this method was never implemented in any popular scientific libraries. And as I ...
1
vote
1answer
66 views

Simulating a Rock, Paper, Scissors Game - Flexible

Today I learnt the basics of OOP. I have tried to apply them to this Rock-Paper-Scissors project. However I'm still a beginner, and so I feel my code can be improved. Are there any tips, trick or ...
6
votes
1answer
78 views

Dangers of increasing fishing on a fish population simulation

Setup The following code implements the algorithm described in this and this paper. The first paper describes how the evolution of a fish population can be simulated, while the second paper introdues ...
4
votes
1answer
67 views

Simulated annealing for magic square-of-squares puzzle

I'm working on a function that takes in a NumPy array containing only mutually distinct positive square numbers. I want the function to pick an element at random, find if there is a lower positive ...
4
votes
1answer
67 views

Random number generator utility class

I have implemented a utility class to perform various random number related task. I am looking for any feedback on design / implementation. I plan to expand the class, and so would like to correct any ...
3
votes
1answer
71 views

Von Neumann random bytes debiasing

I need to create a method to debias biased bytes from the method get_raw_bytes(length) using von Neumann debiasing method. Von ...
2
votes
1answer
80 views

Dice roller - python

I am about to graduate with my Associates degree in Math and will soon go for my bachelors. I've decided with two years of school left its best if I start learning to program. I am starting with ...
2
votes
1answer
78 views

Could anyone say if this is a reliable shuffling code?

I am trying to prove the famous "Monty Hall Paradox": The Monty Hall problem is a probability puzzle named after Monty Hall, the original host of the TV show Let’s Make a Deal. It’s a famous ...
1
vote
2answers
63 views

Monte Carlo Simulation of “DNA Mutation” Game Mechanic

The game Space Station 13 (on the Paradise Station codebase) contains a DNA mechanic. Every carbon-based lifeform with DNA has 55 "blocks" that can be altered in a DNA Modifier, giving the mob ...
4
votes
3answers
159 views

A dice roller in C

I am learning C and, for learning purposes, I implemented a dice roller. It uses arc4random(3) for random number generation, as I couldn't find something better. It works both interactively, if no ...
-2
votes
1answer
38 views

Python guessing game, lottery numbers but using def [closed]

So my task was to make a lottery function, but the instructor only provides half the code when explaining and going through my resources i was unable to find proper examples on how to complete it ...
10
votes
4answers
815 views

Shuffling multiple iterators in order

I have a Python function w/ specified functionality, and two proposed approaches - which do you prefer, and why? (performance, simplicity, clarity, etc) (both use ...
7
votes
3answers
333 views

I made a guess the number game in Python

I just started programming a week ago. Online tutorials aren't my thing, so I decided to just start projects and learn what I need for the project. My first project is a guess the number game. The ...
0
votes
1answer
50 views

My first code - looking for feedback on best practices and things I should avoid doing in the future

After just learning a bit of Python I tried coding something myself. I attempted to do a game of Blackjack, which is far from perfect, and still doesn't have some rules a real game has (in my game an ...
44
votes
4answers
23k views

Seed std::mt19937 from std::random_device

Many people seed their Mersenne Twister engines like this: std::mt19937 rng(std::random_device{}()); However, this only provides a single ...
6
votes
1answer
81 views

Node secure randomness implementations

I'm trying to generate secure randomness in Node as a personal challenge. I was wondering if the following implementations are correctly random or they have some flaws. ...
11
votes
4answers
12k views

Random string of variable length generator

Below is my code for generating a random string of random length. I am using it in integration tests. Currently I have almost 2000 tests running each time a commit is made to master and a few of those ...
1
vote
0answers
60 views

Generate random letters containing a word

There is a popular game called 4 Pics 1 Word that presents to the user 4 pictures representing a common word. The word has to be typed by selecting some of the 9 random letters appearing below the ...
2
votes
1answer
129 views
1
vote
4answers
104 views

Get a random member of a container

It was not obvious how to get a random member of a container. So I wrote a function to retrieve it given a generator. ...
3
votes
1answer
67 views

Generate random ids from specific numbers of auto generated unique ids

I have this class to generate unique ids and random ids from those unique ids. For the unique ids, it's a sequence of numbers between (start number = given number [start_seed]/or random number (0:...
23
votes
8answers
6k views

Random password generator in C

This is a simple password generator. What do you think about it? I am learning C for a while at school and at home. This just has a mix of symbols, lowercase, uppercase and numbers, with a ...
4
votes
2answers
196 views

How to increase the efficiency of DLA algorithm?

The algorithm: Place seed at the center of the canvas. Release a random walker from the edge. Random walker sticks to the neighboring sites of the seed/previous points. Repeat N(particles) times. ...
8
votes
2answers
288 views

Quiz for random boolean expressions

Inspired by the various quiz programs on this site, as well as Simon Tatham's puzzle collection, I thought I'd write a quiz that constructs its questions automatically and randomly. A typical session ...
3
votes
1answer
118 views

Filling up a hand with random cards that are not yet drawn - Monte Carlo

I would like to know if there is a more efficient way to speed up below code. This function is meant to fill in a set of poker hand with the remaining cards using Mersenne Twister for a Monte Carlo ...
3
votes
2answers
117 views

Pick a two different random elements from a given closed range

I wrote a function which picks a two different random elements from a closed range of ints and returns them as a tuple. I would like to take a your feedback, if the solution is a "Clever", "Best ...
5
votes
4answers
363 views

Program in JAVA to generate random alphanumeric string

This code will generate a pseudorandom alphanumeric string of given length. I would welcome suggestions on how to make it more random. Beyond that, have I made any convention violations, Exception ...
3
votes
3answers
76 views

Random Function Bias Tester

I wanted to create a short little piece of code so that I could see the biases in the random function. ...
8
votes
3answers
769 views

Rolling dice in a method chain

I've been writing code for nearly 40 years now and am still not too old to learn and understand new things. Right now, my focus is a bit of OO with functional programming combined and C# with Linq is ...

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