scastie VS codewars.com

From personal experience Scala also works. It's 100% possible to learn monads using https://scastie.scala-lang.org/ as a scratch pad.

Instead I typically use https://scastie.scala-lang.org, or an ammonite script, or just create a new file that extends App in my test directory. The thing that worksheets do better is that you can import things from your project (like the little app in the test dir) but they also show runtime values (like repl or scastie). However I've just never gotten them to actually work.

I strongly recommend you play around with the local Scala REPL. I have Scala 2.13 on my main dev computer and Scala 3 on my other computer. The local REPL will let you know when things are deprecated and give you hints as to what you should use instead. Scastie https://scastie.scala-lang.org/ can also be a big help.

Operationally, as you might expect from a language borne from academia, Scala tooling can be problematic and compilation can be slow--particularly if you are not yet using Scala 3, which only recently emerged and is very slowly percolating through the ecosystem (Remember the Python 2 to Python 3 transition?). But type inference, a vast standard library, and the time-tested reliability of the JVM make you very productive once you get the hang of them. Performance varies with the JVM you're running, but regardless you do have to contend with the size of compiled objects and the latency of garbage collection at runtime. When you want to experiment, you can skip the ceremony of writing a class or test and instead use a command-line REPL, an online REPL called Scastie you can share, or an outstanding third-party command-line REPL called Ammonite. Dependency management is achieved with SBT typically but also more general JVM build tools like Gradle and Maven.

I am using https://scastie.scala-lang.org/ which does compile server side in Scala. The UI is a bit hard to handle tho.

https://github.com/scalacenter/scastie#how-do-i-embed-scastie

My first encounter with regular expressions was in a solution for a coding problem on Codewars, specifically Count the smiley faces! Which asks you to count the number of smiley faces in a given array but the catch is each smiley can have 1 of 2 kinds of eyes (: or ;), may or may not have a nose represented by 1 of 2 symbols (- or ~), and 1 of 2 symbols (D or ) ) for the smile. In total there are 12 different combinations that are a valid smiley. I, being the young and naive programmer I was, hard coded all 12 of those faces and checked every element against that list. And it worked! But the top solution included some strange syntax that I had never seen before

Embrace Challenges: Challenge yourself with platforms like Exercism and Codewars that offer a wide range of coding challenges of varying difficulty levels. Additionally, consider exploring niche topics through courses on platforms like Coursera and edX.

@OP DO NOT go on the path of perfecting it and parting with your time and money. Go with Jake Vanderplas's whirlwind tour of python whirlwind tour of python to get some basics and then jump into the river codewars and swim upstream daily and religiously until you reach to katas level 5. You will be good to go. My personal experience.

Codewars: Codewars

You can try Codewars, they have a diverse range of practice problems(Cryptography, Data Science, etc.). Basically if you wanna get good in a programming language, you have to work on a lot of projects and practice problems.

Codewars is a good platform. Here you can practice code kata's daily in your preferred programming language. Link: https://www.codewars.com/

If you're looking for something that is closer to a combat style game you could try https://www.codewars.com/

codewars.com