added parts for go and python

Author: Markus Ho-Yen

Part4/go/foo.go

@@ -12,17 +12,25 @@ var i = 0
 
 func incrementing() {
     //TODO: increment i 1000000 times
+	for i_inc := 0; i_inc < 1000000; i_inc++ {
+		i++
+	}
 }
 
 func decrementing() {
     //TODO: decrement i 1000000 times
+	for i_dec := 0; i_dec < 1000000; i_dec++ {
+		i--
+	}
 }
 
 func main() {
     runtime.GOMAXPROCS(runtime.NumCPU())    // I guess this is a hint to what GOMAXPROCS does...
 	                                    // Try doing the exercise both with and without it!
 
     // TODO: Spawn both functions as goroutines
+    go incrementing()
+    go decrementing()
 
     // We have no way to wait for the completion of a goroutine (without additional syncronization of some sort)
     // We'll come back to using channels in Exercise 2. For now: Sleep.

Part4/python/foo.py

@@ -12,21 +12,27 @@
 def incrementingFunction():
     global i
     # TODO: increment i 1_000_000 times
+    for count in range(1000000):
+         i += 1
 
 def decrementingFunction():
     global i
     # TODO: decrement i 1_000_000 times
-
+    for count in range(1000000):
+         i -= 1
 
 
 def main():
     # TODO: Something is missing here (needed to print i)
+    global i
 
     incrementing = Thread(target = incrementingFunction, args = (),)
     decrementing = Thread(target = decrementingFunction, args = (),)
 
     # TODO: Start both threads
-    
+    incrementing.start()
+    decrementing.start()
+
     incrementing.join()
     decrementing.join()