README.md

@@ -1,38 +1,3 @@
 # go-concurrency
 
 Aims to learn the knowledge about concurrency in Go
-
-## Flow control with channels
-
-
-1. We can imagine that channel is a pipe, `chan<-` means to send a value into the channel. `<-chan` means to receive a value from the channel.  
-
-2. `select ... case` can execute sending value into a channel
-
-
-## Range and Close
-
-1. A sender can close a channel to indicate that no more values will be sent.  
-2. Receivers can test whether a channel has been closed by assigning a second parameter to the receive expression. `v, ok := <-ch`, `ok` is `false` if there are no more values to receive and the channel is closed.  
-3. The loop for `i:= range c` receives values from the channel repeatedly until it is closed.  
-4. Only the sender should close a channel, never the receiver. Sending on a closed channel will cause a panic.  
-5. Channels aren't like files; you don't usually need to close them. Closing is only necessary when the receiver must be told there are no more values coming, such as to terminate a `range` loop.  
-
-
-## Select 
-
-1. The `select` statement lets a goroutine wait on multiple communication operations  
-2. A `select` blocks until one of its cases can run, then it executes that case. It chooses one at random if multiple are ready  
-
-## Default selection
-
-1. The `default` case in a `select` is run if no other case is ready.  
-2. Use a `default` case to try a send or receive without blocking  
-```
-select {
-    case i:= <-c:
-        // use i
-    default: 
-        // receive when c is blocked        
-}
-```

basics/default-select/main.go

@@ -1,25 +0,0 @@
-package main
-
-import (
-	"log"
-	"time"
-)
-
-func main() {
-	tick := time.Tick(100 * time.Millisecond)
-
-	boom := time.After(5000 * time.Millisecond)
-
-	for {
-		select {
-		case <-tick:
-			log.Println("tick.")
-		case <-boom:
-			log.Println("boom")
-			return
-		default:
-			log.Println("    .")
-			time.Sleep(50 * time.Millisecond)
-		}
-	}
-}

basics/range-close/main.go

@@ -1,25 +0,0 @@
-package main
-
-import (
-	"log"
-)
-
-func fibonacci(n int, ch chan int) {
-	x, y := 0, 1
-	for i := 0; i < n; i++ {
-		ch <- x
-		x, y = y, x+y
-	}
-	close(ch)
-}
-
-func main() {
-	ch := make(chan int, 10)
-
-	go fibonacci(cap(ch), ch)
-	for i := range ch {
-		log.Println(i)
-	}
-
-	log.Println("Done")
-}

basics/select/main.go

@@ -1,32 +0,0 @@
-package main
-
-import "log"
-
-func fibonacci(ch, quit chan int) {
-	x, y := 0, 1
-	for {
-		select {
-		case ch <- x:
-			x, y = y, x+y
-		case <-quit:
-			log.Println("quit")
-			return
-		}
-	}
-}
-
-func main() {
-	ch := make(chan int, 10)
-
-	quit := make(chan int)
-
-	go func() {
-		for i := 0; i < cap(ch); i++ {
-			log.Println(<-ch)
-
-		}
-		quit <- 0
-	}()
-
-	fibonacci(ch, quit)
-}