Questions tagged [random]

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

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4
votes
1answer
84 views

Random password generator that ensures diversity of character types and absence of confusing characters

I wrote the following password generator, to generate a password in which each character group appears at least at once. ...
3
votes
1answer
48 views

Simple winform that randomizes images in a picturebox

I wrote this code for a simple app that gives us random images. The code works, but I feel like I'm doing something wrong. And one thing I would love to know is instead of grabbing from a folder ...
3
votes
0answers
20 views

Optimization of weightedWinner() and random() function

I have written a Lottery contract that picks winner based on the amount they contributed to the pool. I am looking if the code of weightedWinner function can be ...
10
votes
4answers
744 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 ...
5
votes
2answers
641 views

Writing 1.5 million rows in a file

I am generating SQL statements (of MySQL format) and writing into a file to create 10,000 tables. Each table contains 5 columns with 1.5 million rows of data in each column. I generated these data by ...
3
votes
2answers
116 views

BiasedOptionChooser<T>: a class to do “weighted random choices”

I need to select "random" elements from a collection. Random is quoted because I must assign a weight to each element; elements with higher weights have a greater chance of being selected. To achieve ...
4
votes
2answers
97 views

Data structure that retrieves each item with a specified probability

I wanted a data structure that allowed me to set the chances of randomly returning each of it's elements. For example, suppose I have a Human class. Every Human has an attribute called eyeColor. I ...
0
votes
2answers
68 views

Random string generator that 'guesses' user inputted word [closed]

This takes a user inputted string, then tries to randomly 'guess' it. The problem is that whenever the input's length is 6 digits or more, it takes an incredibly long time to process it. Is there a ...
5
votes
4answers
440 views

Thread-safe, Convenient and Performant Random Number Generator

I need to generate a lot of pseudo-random numbers in my software. I'm trying to create a elegant (syntax-wise) and performant class that would allow me to generate such numbers and perform other ...
6
votes
4answers
3k views

Create two random teams from a list of players

The task is to create two random teams from a list of players. Given an example of players = ["John", "Mike", "Alice", "Bob"] One example random team would be: <...
1
vote
2answers
88 views

Generate random characters from ranges 0–9 and a–Z

I’m trying to generate 5 characters from the ranges 0–9 and a–Z. Is my solution optimal or did I overthink it a little? Would hardcoding a character list be more optimal? ...
4
votes
1answer
93 views

Random password generator (Java)

I wrote this program recently to generate random passwords for myself. It works well but it's been a long time since I wrote any java and am just looking on ways to clean up the code. I'm also not ...
2
votes
1answer
65 views

Java Perlin noise implementation

I've decided to code Perlin noise generator in Java. It works pretty well, I just want to know If I am doing everything right and if it is a valid implementation! PS : The ...
3
votes
1answer
64 views

Random password generator with choice of three strengths

My code works fine but I definitely have unecessary repeat code. I'd like to use functions so I don't have repeat code. I would appreciate any advise on how to make my password generator code more ...
3
votes
1answer
144 views

Random item generation system to be used in a roguelike

New to programming with the goal being to create my own roguelike. I am mostly interested right now in creating my item generation system. I want the code to create a random item that can then be used,...
4
votes
1answer
44 views

C++ wrapper around uniform mt19937 SequenceContainer [closed]

With the following interface in mind EasyRandom<unsigned int> prng(a, b); auto x = prng(); // scalar auto v = prng(10); // vector I wrote the following ...
4
votes
1answer
67 views

PRBHA-10: A hashing algorithm in Python

So I've been working on a simple little hashing algorithm for Python that I like to call PRBHA-10 for short, or Pseudo-Random-Based Hash Algorithm. This is a hash algorithm in Python that is meant to ...
6
votes
1answer
146 views

OOP demonstration in C++17 using a Pokémon

I want to showcase with as minimal code as possible the basic Object-oriented programming (OOP) principles of Polymorphism, Inheritance, and Encapsulation. I know there are many more principles than ...
4
votes
1answer
176 views

PHP program to generate random phone number

I created a PHP program to generate random phone numbers. A valid phone number: must be exactly 11 digits in length, and must start with any of the values mentioned in the ...
2
votes
2answers
54 views

Generating a list (or a string) with random elements

During implementation and testing of different small hobby projects I often reach the point where I need (at least I like it more) some random data beyond the usual foo-bar strings or lists. Random ...
7
votes
2answers
139 views

Simple function that simulates survey results based on sample size and probability

What is this: This is a simple function, part of a basic Monte Carlo simulation. It takes sample size and probability as parameters. It returns the simulation result (positive answers) plus the input ...
3
votes
1answer
98 views

Random String Chooser

I was tasked with creating the class RandomStringChooser that prints the strings in the passed array in a random order, based on the ...
6
votes
2answers
324 views

Generating 10-character passwords, with 3-6 digits and 3-6 uppercase letters, in C++

In response to a question on Information Security on brute-forcing passwords, I wrote code that helped solve the problem: Generate a password list of 10 character passwords containing only a ...
3
votes
1answer
126 views

Generating Biased Random Values (Walker's Alias Method)

Am simply wondering if I made any egregious mistakes while implementing the Alias Method as an IEnumerator<TElement>; would also like to know if there are any ...
3
votes
1answer
51 views

Simple command-line roulette game

I developed a simple command-line roulette game. Your only options are betting on color, but you can bet multiple times in one round ...
6
votes
1answer
118 views

Qt Number Generator v2

Link to the old question. I tried to learn some new things from the answers and here's what I did: Used Qt Designer so that in Config.h, all member variables and ...
5
votes
3answers
142 views

Python coin flipper

I know this is the simplest code that you have probably ever seen but its the first thing I've ever made. Any ideas on how to improve it or add new functions to it? ...
2
votes
1answer
136 views

Speed up fast poisson disk sampling generator in Python

I wrote a generator class which implements Fast Poisson Disk Sampling algorithm in Python. I did some optimizations like, x ** 2 -> x * x, using unpacking ...
1
vote
1answer
86 views

Advanced love calculator that generates a result based on the similarities between the two names

My love calculator gives a result from 0 to 100% based on these factors: If the first letters of the names are the same. If the number of vowels is the same. If the length of the name is the same. If ...
6
votes
2answers
185 views

Quantum random number generator

I'm working on a Quantum Random Number Generator and wanted to get some feedback on the project so far. I'm using PyQuil to generate machine code for the quantum computer, first to create a bell ...
3
votes
2answers
208 views

Number guessing game in C

This is just a little number guessing game. I know it's simple but I am a newbie in C and I think such a little example can be enough for finding simple design flaws that can than be eliminated. If ...
3
votes
1answer
65 views

Generating random number from a binomial distribution

In my application of Monte Carlo simulation, the crucial part is to generate a random number from a binomial distribution with parameters n = size and p = 0.5. Here is my current implementation ...
5
votes
1answer
40 views

High performance wrapper for CSPRNG arc4random(3)

This function is a wrapper for arc4random(3), a cryptographic pseudo-random number generator on macOS and BSDs, but you can also get it by installing ...
2
votes
0answers
57 views

Password Generation Using Cryptographically Strong Random Number Generation

My goal in creating this project was to create a password generator that was simple enough to be useful as well as sophisticated enough in its random-number generator so as to not be contrived. I ...
1
vote
3answers
567 views

Randomly pick key from dictionary weighted by the keys value

I was trying to write a function that would get a random card from a dictionary of cards in a players deck weighted by the number of cards of each type you have. I don't know if the solution I came up ...
1
vote
1answer
40 views

Random String Generation module in Python

The module is for facilitating random string generation. The example I use to explain it is the following: Instead of writing ...
1
vote
1answer
123 views

Vectorized N-Dimensional Random Walk in Cartesian Coordinates

I have written a random-walk routine that I hope to build upon in the future. Before doing so, I was hoping to get some critique. I believe the implementation is correct. I noticed that many other ...
2
votes
1answer
83 views

Incrementing time in a discrete-event simulation of a supermarket queue

A method has been written that increments time in minutes that simulates how much time it takes to process item in a supermarket queue and if there is an empty queue, skip it and loops around to find ...
5
votes
3answers
308 views

Uniformly generate a number from 0 to n-1 that isn't on a blacklist

The task: Given an integer n and a list of integers l, write a function that randomly generates a number from 0 to n-1 that isn't in l (uniform). Solution 1: ...
3
votes
0answers
72 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 ...
5
votes
2answers
420 views

Counting consecutive selections of a given number when sampling integers in a range

This script counts consecutive number strikes of a number that you determine in a number-sequence that you also determine. I would be very pleased if this script can be reviewed in terms of ...
1
vote
2answers
269 views

Python password generator

This is considered as my second python project, I made the password generator where user has to input length of password minimum 5. I made the code that it will guarantee at least one lowers case, ...
3
votes
1answer
61 views

Token generation system in py3.7

I've created a system to generate tokens that could potentially be used in some sort of program: ...
0
votes
1answer
61 views

Probability suite for an array of elements

I wrote a function that can be used to generate a probability distribution for an array of elements (probGen()), and another that can be used to select an element ...
2
votes
2answers
75 views

Return Set<Integer> with random unique Integer numbers between min and max range

I need set of random unique Integer numbers for my unit test. I implemented this method, however I'm not sure if this is best way to implement this. ...
1
vote
0answers
32 views

Moderate return-low risk vs high returns-high risk investments

To quantify Buffet's #1 rule of investing, "Don't lose money", I take the assumption that % returns of an investment follow a Normal distribution. Now a high return high risk investment might follow ...
0
votes
1answer
40 views

Assigning zero to random cells in a pandas.DataFrame

I am trying to assign 0 to random cells in a one dimensional pandas.DataFrame. The below code is the best way I could think of ...
2
votes
1answer
109 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 ...
4
votes
2answers
2k views

Bulls and Cows C++ beginner project

I'm not a beginner programmer as I have experience in Node and Ruby, but I'm a beginner when it comes to C++. And as C++ is quite different from these two, I figured I could use any tips, tricks, ...
3
votes
3answers
86 views

Pseudo-truly random number generator

I am creating what strives to be a truly random number generator. As of right now, the implementation uses a mix of mainly nonsense system data and some pseudo-random numbers to generate numbers that ...