Fix compile errors and add the test result from Macbook Pro (Mid-2014)

Author: xv-tom-l

concurrency/go/hello1/main.go

@@ -1,14 +1,19 @@
 package main
 
-import "fmt"
+import (
+	"fmt"
+	"runtime"
+)
 
 func main() {
+	runtime.GOMAXPROCS(0)
+
 	quitSignal := make(chan int)
 
 	greetings := "hello"
 	for i := 0; i < 1000; i++ {
 		go func(i int, signal chan int) {
-            fmt.Printf("%s from goroutine          number %d\n", greetings, i)
+			fmt.Printf("%s from goroutine          number %d\n", greetings, i)
 			signal <- 1
 		}(i, quitSignal)
 	}

concurrency/go/hello2/main.go

@@ -1,14 +1,19 @@
 package main
 
-import "fmt"
+import (
+	"fmt"
+	"runtime"
+)
 
 func main() {
+	runtime.GOMAXPROCS(0)
+
 	quitSignal := make(chan int)
 
 	greetings := "hello"
 	for i := 0; i < 1000; i++ {
 		go func(i int, signal chan int) {
-            fmt.Printf("%s from goroutine          number %d\n", greetings, i)
+			fmt.Printf("%s from goroutine          number %d\n", greetings, i)
 			signal <- 1
 		}(i, quitSignal)
 	}

concurrency/result_macbook_pro_2014.md

@@ -0,0 +1,38 @@
+## Go
+###   hello1:
+
+real	0m0.008s
+user	0m0.003s
+sys	0m0.004s
+
+###   hello2:
+
+real	0m0.007s
+user	0m0.003s
+sys	0m0.004s
+
+## Rust
+###   hello1
+
+real	0m0.010s
+user	0m0.002s
+sys	0m0.005s
+
+###   hello2
+
+real	0m0.036s
+user	0m0.054s
+sys	0m0.092s
+
+## Ruby
+###   hello1
+
+real	0m0.029s
+user	0m0.021s
+sys	0m0.007s
+
+###   hello2
+
+real	0m0.206s
+user	0m0.143s
+sys	0m0.085s

concurrency/ruby/hello1.rb

@@ -14,4 +14,4 @@
 end
 
 # wait for all thread finishes
-threads.each &:joni
+threads.each &:join

concurrency/ruby/hello2.rb

@@ -1,7 +1,8 @@
 count = 0
+threads = []
 
 1000.times do |i|
-  Thread.new do
+   threads << Thread.new do
     greeting_message = "Hello"
 
     # This is weird in Ruby but it's closer to the println! macro
@@ -13,6 +14,4 @@
 end
 
 # wait for all thread finishes
-while count < 1000 do
-    # do nothing
-  end
+threads.each &:join