Can you generate this random sequence for me? Inspired by this question on Retrocomputing I want to create a random generator that always returns a desired word. I desperately need this so I can hide some easter eggs. For science easter! Input A word, either in string format or an array or ve...

In mathematics, the factorial, shortened "fact" of a non-negative integer n, denoted by n!, is the product of all positive integers less than or equal to n. For example, 5! is 1 * 2 * 3 * 4 * 5 = 120 The factorial of 0 is 1, according to the convention for an empty product. These are the regu...

I am having trouble understanding why this solution works for leetcode problem number 221. The runtime for this solution is O(MN). I've been reading this solution and running it through my interpreter but I am still confused. Specifically, what is confusing me the most are all the k variables. It...

I just noticed that PPCG now has Code Review's icon in some areas of SE. I'm pretty sure this is a bug since I can't find any discussion related to it. Basically the problem seems to appear wherever the site sprite sheet is used. Looking closer, it seems that every site's icon is off by two (one...

A Room Of Mirrors code-golf ascii-art (This challenge seems similar, but the task is designed differently.) Imagine a 2-dimensional room, where the walls are plated with flat mirrors. Suddenly, a beam of light strikes into the room, where a piece of wall is missing! The lightbeam dances a...

In this challenge, we render Ascii user interfaces. +----------------------+ |+-----------++-------+| ||<- Previous||Next ->|| |+-----------++-------+| |== The title == | | | |Lorem ipsum dolor | |sit amet... | |+--------------+ | ||Post a comment| ...

My boss now wants me to implement a mechanism that lets him search for an item in an array, and gives him the index/indices where that value occurs. Your Task: Write a program or function that receives an array and a value (String, Integer, Float, or Boolean), and returns the indices of the a...

Implement the MD5 hashing function, which passes the following test cases: MD5f("") = d41d8cd98f00b204e9800998ecf8427e MD5f("hello") = 5d41402abc4b2a76b9719d911017c592 MD5f("123456789") = 25f9e794323b453885f5181f1b624d0b but fails on this one: MD5f("faulty") != c4ef1e7ec5c765839c8acdd9968542b...

I noticed a bunch of edits showing up in the edits queue where the usual javascript leaderboard is added to challenges. Example Example I think the leaderboards are fine, but do we really need to add these to challenges that have been inactive for quite some while?

This is a cops-and-robbers challenge, the robbers thread can be found here. Your task is to write some code that outputs an OEIS sequence, and contains the name of the sequence in the code (A______) and outputs a second separate sequence when the name of the sequence in the code is changed t...

This is a cops-and-robbers challenge, the cops thread can be found here. This is the robbers thread, your job here is to take submissions on the cops thread and try to find the hidden sequences. If you find any sequence that can be substituted into the original code to compute that sequence...

The Sequence Everyone knows the only even prime number is 2. Ho-hum. But, there are certain even numbers n where, when concatenated with n-1, they become a prime number. For starters, 1 isn't in the list, because 10 isn't prime. Similarly with 2 (21), and 3 (32). However, 4 works because 43 is ...

You will be given an integer n, and you must print all permutations upto and including size n based on the alphabet {0, 1}, in the following format: n = 0 print {} n = 1 print {0, 1} n = 2 print {0, 1, 00, 01, 10, 11} n = 3 print {0, 1, 00, 01, 10, 11, 000, 001, 010, 011, 100, 110, 101, 1...