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Style guide
You should code your Python to follow PEP (Python Enhancement Proposal) documents, and in particular, PEP8.
PEP8
Comparing your code to PEP8's standards shows quite a few violations.
You should have whitespace between your binary operators.
factors=[]
number=int(n)
Two b...
Create a race condition
Your objective is to create program where concurrent threads race to produce a result. The program is simple. Print the sum of every element in the cartesian product of two sets.
An example of standard input would be
2 5 8 10 | 9 2 3 7 512 | 3 1 2 | 9 8 6 3
The progra...
Write a program that accepts input as a string of unary numbers delimited by spaces, and prints the equivalent string of numbers in binary, decimal, and hexadecimal (not necessarily in that order). These unary symbols are allowed:
stroke, '/' or '\'
Decimal 1
ASCII 'I'
ASCII '-'
e.g. if the i...
I'm new to this stackexchange, but I must say I am very impressed by the knowledge of some here, and the original codegolf answers for some questions.
I'm not even sure if the following is possible, since my programming language knowledge is very limited, but it sounds like a pretty interesting ...
A Tiny Raytracer
Your task is to make a tiny 2D raytracer to render beautiful ascii images.
Input
Your input will be an arbitrary 2D array delimited by newlines with the following structure
########
#9 #
# #
# ## #
# ## #
# #
# ###
########
The symbols are:
0-9 = Light...
I've just been alerted to a company which produces board games - you design the game, artwork 'n all, and upload the assets to them. They produce the game and sell it in their store, taking half the profits.
I'm a big board game fan (1), and would love to help design a board game around Stack Ov...
In this code-challenge you will write a hash function in 140 bytes1 or less of source code. The hash function must take an ASCII string as input, and return a 24-bit unsigned integer ([0, 224-1]) as output.
Your hash function will be evaluated for every word in this large British English diction...
(Just open 50 tabs on Google Chrome :D (just kidding, no you can't))
Shortest code for infinite disk I/O any language, C# example:
using System.IO;
namespace FileApp {
static class Program {
public static void Main() {
do {
File.WriteAllText("a", "a");
...
Self-decrypting code
code-challenge
The Caesar cipher is perhaps the earliest and most well known form of encryption. Here's a quick overview:
Pick a message, and a numerical encryption key. For this example, I'll pick "HELLO, WORLD" and 3, respectively.
First, convert each letter into its AS...
