Introduction: Ever used Dropbox with some other people and you both modified the same file? Ever had a multi-user application with a relational database, and two people were modifying (or worse, one was deleting and the other modifying) the same object? Well, let's simulate that with this challe...

Ark of Noah Integer Lists code-golfintegernumber Introduction: I think we've all heard of it, but here a very brief summary: Noah gathered two of every species of animal on the planet, male and female, to save in his Ark during a great flood. Here a rather simple challenge based on that: Cha...

I want to create a object detection algorithm able to recognize and counting mutiple objects (in my specific case fish fry) from images collected from fry hathery (see representative attached image) I actually try it by using both HSV-space color detection as well as morphological operators illu...

Two armies are about to clash on a battlefield. Each army is composed of one or more creatures. Each creature is defined by a number pair P/H, where P is the creature's power (the damage it deals), and H is the creature's health. Each army is led by a hero. A hero (typically) cannot attack, but ...

Can the cursor reach the bottom? A cursor position is valid if either of its two sides touches whitespace (i.e. a space or a newline(CR+LF or LF, depending on your OS)). The input will always consist of valid cursor positions. This takes one input(a character matrix), and for a cursor on the up...

Your challenge is very simple: output the previous answer, in reverse. However, as with this similarly-titled question, there's a catch: in this case, you can only use characters from the answer before the last. For example: Let's say the first answer looks like this: 1 - Python print(...

Atomic Handshakes code-golfnetworkconnectionintegerarray Introduction Here you are. At a party, with two drinks in your hands. Your friend just went to the bathroom and you don't really know anyone else here. And so you wait. Or do you? There is a century old hypothesis known as Six Degrees o...

The first instance of Machine Learning Golf received a lot of intention but also revealed some problems (mostly caused by people in this community being too clever ;-)). I intend to address those issues in this second installment: Fashion MNIST is a dataset of 60,000 labelled 28x28 pixel graysc...

The task is to assign a random field of JSONObject with random value (assuming that the second part is known "with random value" how to do). Here is an example: JSONObject valueToSet = new JSONObject(); switch (new Random().nextInt(3)) { case 0: valueToSet.put("name", "EditMe " + SpecialDate...

Your challenge is very simple: output the previous answer, in reverse. However, as with this similarly-titled question, there's a catch: in this case, you cannot use characters from the answer before the last. For example: Let's say the first answer looks like this: 1 - Python print('h...

In this simple but fun challenge, you were asked to determine if Jimmy would fall of their platform. Jimmy has three body parts /, o, and \ arranged like this /o\ Platforms are represented with -. Jimmy will fall off their platform iff they have two or more body parts that are not directly a...

The challenge here is quite simple: Your program (we'll call it Program A), when given any character 'D' as input, should print its own code, but excluding all instances of 'D'. That output should be valid code in the same language as the original (we'll call this new program Program B). When r...

I honestly can't believe this challenge does not already exist. The challenge Write a function. The specifics Your program must define some sort of callable function. This includes anything commonly known as a function, a lambda function, or a subroutine. All of these types of callables will...