Added ping-pong exercise to practice goroutines

Currently trying to figure out concurrency without suffering a headache,
stay tuned for more black magic using channels

ping-pong/go.mod

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+module ping-pong
+
+go 1.22.1

ping-pong/main.go

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+package main
+
+import (
+	"fmt"
+	"time"
+)
+
+var ball int = 0
+
+// Credits to this tutorial for actually teaching how to work with channels
+// https://riptutorial.com/go/example/6056/ping-pong-with-two-goroutines
+
+// Okay so from what I'm gathering here, the function input for the channel takes in an arrow depending on whether
+// or not it's getting a value from the channel, or sending a value into the channel, here it's pulling from
+// pingChan since the arrow is at the left
+
+// For the second input value it's gonna be pulling the value from the pong Channel instead of sending to it
+func ping(pingChan <-chan int, pongChan chan<- int) {
+	for {
+		<-pingChan
+		fmt.Println("PING:", ball)
+		fmt.Printf("Current goroutine: %v\n\n", pingChan)
+		ball = ball + 1
+		time.Sleep(time.Second)
+		// Instead of calling each other's function, we seem to initialize each goroutine by directing a value
+		// into its channel
+		pongChan <- 1
+	}
+}
+
+// Over here it should be opposite, since the ping func sends its value into pingChan, then here we need to
+// pull the value from pingChan, and in the case of pongChan it's the opposite
+func pong(pingChan chan<- int, pongChan <-chan int) {
+	for {
+		<-pongChan
+		fmt.Println("PONG:", ball)
+		fmt.Printf("Current goroutine: %v\n\n", pongChan)
+		ball = ball + 1
+		time.Sleep(time.Second)
+		pingChan <- 1
+	}
+}
+
+// This is some black magic
+func main() {
+
+	// Here we initialize both channels, and provide both to each function called through "go"
+	pingChannel := make(chan int)
+	pongChannel := make(chan int)
+	go ping(pingChannel, pongChannel)
+	go pong(pingChannel, pongChannel)
+
+	// Now we're just initalizing them with a 1
+	pingChannel <- 1
+
+	for {
+		time.Sleep(time.Second)
+		if ball >= 10 {
+			break
+		}
+	}
+
+	fmt.Println("Finished")
+
+}
+
+// WARNING: Do not read the following if you don't wish to have your retinas burned!
+
+// var pingChannel chan int
+// var ball int
+//
+// func main() {
+// 	pingChannel := make(chan int)
+// 	fmt.Println("Hello world")
+// 	ball := 0
+// 	go ping(pingChannel)
+// 	//go pong(ball, pingChannel)
+// 	ping <- 1
+//
+// 	for {
+// 		if ball >= 10 {
+// 			fmt.Println("Ball value above 10")
+// 			os.Exit(0)
+// 		}
+// 	}
+// }
+//
+// func ping(ballChannel <-chan int, ponger chan<- int) {
+// 	pingChannel := make(chan int)
+//
+// 	ball = <-ballChannel
+// 	fmt.Println("PING", ball)
+// 	ball = +1
+//
+// 	ballChannel <- ball
+// 	go pong(pingChannel)
+// }
+//
+// func pong(ballChannel chan int, ponger chan<- int) {
+// 	pingChannel := make(chan int)
+//
+// 	ball = <-ballChannel
+// 	fmt.Println("PONG", ball)
+//
+// 	ballChannel <- ball
+// 	go ping(pingChannel)
+// }