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defmodule Lexer do
    def lex(current  \\ 0, tokenstream  \\ [], len, input_str) do
        char = String.at(input_str, current)
        unless current >= len do
            cond do
                ...
            end
        else
            tokenstream
        end

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If you've been trying to get into functional programming, there's a good chance you've heard of composition and piping. These concepts apply to point-free programming. This is an attempt at a simple, clear explanation of function composition and piping. I will write these examples in F#, but the concepts apply to other languages like Haskell. They just use different operators sometimes.

Prerequisites: basic programming knowledge. This explanation is going to be simple.

Piping
Let's begin with the simpler of the two (at least according to my experience): piping. There are two ways which you could pipe a value to a function. Forwards, and backwards. When you pipe forward, you are applying the left side of the forward

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Progress bar. Code to run:

from terminal_easy import *
from asyncio import sleep as async_sleep
async def main():
    for _ in range(100):
        update_progress(1)
        await async_sleep(0.01)

progress(

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GUI in Rust

The Rust programming language seems like a good fit for GUI programming. C++ developers have access to Qt, wxWidgets and many more. It's considered that GUI is just not there yet in Rust. I tried using Iced, it seemed like a good option. But Iced's examples were not working. I didn't bother with other libraries, they were mostly GTK and webview. I gave it another try. And at least two options did work! egui and Tauri. You've probably heard of both of them.

Tauri

You might criticize Tauri for its performance. But you'd be wrong.

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open System
open System.Text
// Helper functions (SEE End of file for details)
let numeric c = (c >= '0' && c <= '9')
let ofword c = 
    (c >= 'a' && c <= 'z' || c >= 'A' && c <= 'Z' || c = '\'')
let str c = (c = '"') // fix highlighting syntax "
let notstr c = (c <> '"') // "

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Default theme

Light theme

Message box

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Reviewing functional programming

Here, I'll cover review functional programming according to my experience when I tried it. I'll cover what advantages there are and what disadvantages there are. My struggles, and what I found easier, and finally a conclusion. This is not a scientific paper, and is based solely on developer experience, it's more useful if you're trying to understand developer experience. Hopefully, this will help you decide whether or not to try functional programming.
So, I originally started programming in general procedurally, with Python. It's important to note that functional programming and object oriented programming are not the only two paradigms -- contrary to popular belief. Procedural programming is largely very different to functional programming, so do keep that in mind.

When I started functional programming, I started with F#. I was careful to avoid imperative structures like control flow. And when I began, it was

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Lexing for beginners

This is a guide that should teach you how to perform basic lexing in a functional programing language.
Everything was written in Elixir, but you should be able to follow it if you are using any functional programming language.
Or even an imperative programming language like Python, C or Java.\

What is lexing?

The first question you should ask yourself is, what is lexing? It's the same as tokenising, scanning or lexical analysis.
That might not help you if you haven't heard of these either. Put simply, lexing is the process of breaking down a string
into meaningful units, indepdendent of context. What a lexer will do is make the following happen:

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# A small, unoptimized lexer in the Elixir programming language.
# No mutable values are used. 
# This lexer was much, much easier for me to write and debug than when I had done it
# using imperative programming concepts such as loops and mutable values.
# This can be optimized by consuming the input string, instead of indexing.

defmodule Lexer do
    # char info
    def numeric(char) do
        char >= "0" and char <= "9"

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Exporting your Map

Follow the process below.

Finding your Directory

Click the > like thing to expand.

Windows 10

Open up the "Run" app, (shortcut Win+R) and insert this.
%LocalAppData%\Packages\Microsoft.MinecraftUWP_8wekyb3d8bbwe\LocalState\games\com.mojang\minecraftWorlds
This will find the Minecraft Windows 10 Edition directory and you will see some folders here.