Increased scope of project to full mastery of Golang

Author: timmyjose

README.md

@@ -1,3 +1,3 @@
-# golang-concurrency
+# mastering-golang
 
-mastering concurrency in Go using various resources.
+Mastering Golang, especially concurrencym using various resources.

concurrency/buff_chan/buff_chan.go

@@ -0,0 +1,25 @@
+package main
+
+import "fmt"
+
+func main() {
+	ch := make(chan int, 2)
+	ch <- 1
+	ch <- 2
+
+	fmt.Println(<-ch)
+	fmt.Println(<-ch)
+
+	// this would cause a deadlock since the call is blocking,
+	// and nothing is going to ever fill that channel with a value
+	//fmt.Println(<-ch)
+
+	// this is fine though since we do fill in the channel's queue with
+	// a value using the goroutine
+
+	go func() {
+		ch <- 3
+	}()
+
+	fmt.Println(<-ch)
+}

concurrency/buff_chan/go.mod

@@ -0,0 +1,3 @@
+module conc/buff_chan
+
+go 1.18

concurrency/channel_sum/channel_sum.go

@@ -0,0 +1,24 @@
+package main
+
+import "fmt"
+
+func main() {
+	nums := []int{1, 2, 3, 4, 5}
+
+	ch := make(chan int)
+	go sum(nums[:len(nums)/2], ch)
+	go sum(nums[len(nums)/2:], ch)
+
+	total := <-ch + <-ch
+	fmt.Printf("Total = %d\n", total)
+
+}
+
+func sum(nums []int, ch chan<- int) {
+	sum := 0
+	for _, n := range nums {
+		sum += n
+	}
+
+	ch <- sum
+}

concurrency/channel_sum/go.mod

@@ -0,0 +1,3 @@
+module conc/channel_sum
+
+go 1.18

concurrency/hello/go.mod

@@ -0,0 +1,3 @@
+module conc/hello
+
+go 1.18

concurrency/hello/hello.go

@@ -0,0 +1,19 @@
+package main
+
+import (
+	"fmt"
+	"time"
+)
+
+func main() {
+	go say("world")
+	say("hello")
+
+}
+
+func say(s string) {
+	for i := 0; i < 5; i++ {
+		time.Sleep(100 * time.Millisecond)
+		fmt.Println(s)
+	}
+}