RandomGen | A simple random generation framework for .NET Core

I have seen this answer, and am still trying to add this answer. This IS NOT a duplicate.

I have a 20x20 grid, and the screen size is 800x640. The screen cannot see the full grid, and I want it to be able to via a scrolling camera.

However, I am not sure how I would even implement this.

The way my code works is that, in the main loop, player.update() is called to update the player's position and collision, and then an update() function is called, which redraws all sprites in the grid (to show any changes).

Code:

I am making a game in pygame, and would like to add infinite World generation. I already have implemented the drawing mechanism, and the randomGen method, which I will list here. I am wondering if there is a way to do infinite world generation.

Random Generation:

I would like to run 3 scenarios. The first has 80% which returns IsRandom = false the other two have 10% each for Group "A" or Group "B".

Here is my code:

I want to use Control.Monad.Random.Class.fromList

I want to use do notation to combine pseudo-random values:

I have a situation where I have some similar newtypes that all need to be instances of Random, Arbitrary, and lots of other stuff. They all need the same custom implementation of the functions randomR, random, arbitrary, etc. So I put all of those implementations in a class.

Here's a simplified example, that just handles Random.

I am a new student at a university learning how to code in Java. So far the assignments have been going fine, but I've encountered this odd error with my most recent one which I can't seem to find a fix for.

The assignment asks me to create my own class called MyRandom which allows the user to define a range containing a lower bound and an upper bound. The methods in the class will use this range to generate a completely random integer and double which must be located within the range. The tricky part is that the assignment has specified me to use speficially java.util.Random as an object variable to use for the methods. In Visual Studio the code does not seem to display any errors, yet when I attempt to run it in a test client I receive a java.lang.NullPointerException which seems to start off at the method which is supposed to create a random whole number.

So far this is what I've got:

I want to write a function that would take a String and a Char and randomly either prepend or append the Char to the String.

I am wrote this, but it doesn't work because of some the type signature is the last line:

I am creating a simple etch-a-sketch game. currently on hover it colors in black. I am trying to use a button to reset the colors back to white. However, i can't get the button to function with an event listener, if i add an alert it displays the alert but nothing else. Please guide me and supply a documentation that I can reference as I want to learn and fixing it without explaining will be counterproductive at this point.

Thank you !