Added goroutines and channels and buffered channels in the goroutines module

Author: anarchymonkey

go_basics/go.work

@@ -7,6 +7,7 @@ use (
 	./defer_panic_recover
 	./functions
 	./gomaps
+	./goroutines
 	./interfaces
 	./loops
 	./methods

go_basics/goroutines/channels/go.mod

@@ -0,0 +1,3 @@
+module anarchymonkey.com/go-basics/goroutines/channels
+
+go 1.20

go_basics/goroutines/channels/main.go

@@ -0,0 +1,41 @@
+package main
+
+import "fmt"
+
+func sum(nums []int, c chan int) {
+	length := len(nums)
+	sum := 0
+	for i := 0; i < length; i++ {
+		sum += nums[i]
+	}
+
+	fmt.Println("Sending to channel")
+	c <- sum
+}
+
+func main() {
+
+	nums := []int{
+		1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
+	}
+
+	c := make(chan int)
+
+	// this helps goroutines to sync
+	go sum(nums[:len(nums)/2], c)
+	go sum(nums[len(nums)/2:], c)
+
+	firstSum, secondSum := <-c, <-c
+
+	fmt.Printf("The first sum  = %d \n The second sum = %d \n", firstSum, secondSum)
+
+	// buffered channels
+
+	var channel_v1 chan int = make(chan int, 2)
+
+	channel_v1 <- 1
+	channel_v1 <- 2
+
+	fmt.Println("first", <-channel_v1)
+	fmt.Println("second", <-channel_v1)
+}

go_basics/goroutines/go.mod

@@ -0,0 +1,3 @@
+module anarchymonkey.com/go-basics/goroutines
+
+go 1.20

go_basics/goroutines/goroutines.go

@@ -0,0 +1,24 @@
+package main
+
+import (
+	"fmt"
+	"time"
+)
+
+func saySomething(text string) {
+
+	for i := 0; i < 5; i++ {
+		time.Sleep(100 * time.Millisecond)
+		fmt.Printf("%s \n", text)
+	}
+
+}
+
+func main() {
+
+	// side villans
+	go saySomething("Meeta is cute")
+
+	// main villan
+	saySomething("When you run it what will happen?")
+}