concurrency

about_concurrency.go

@@ -0,0 +1,31 @@
+package go_koans
+
+func isPrimeNumber(possiblePrime int) bool {
+  for underPrime := 2; underPrime < possiblePrime; underPrime++ {
+    if possiblePrime % underPrime == 0 {
+      return false
+    }
+  }
+  return true
+}
+
+func findPrimeNumbers(channel chan int) {
+  for i := 2; /* infinite loop */ ; i++ {
+    // your code goes here
+
+    assert(i < 100) // i is afraid of heights
+  }
+}
+
+func aboutConcurrency() {
+  ch := make(chan int)
+
+  assert(__delete_me__) // concurrency can be almost trivial
+  // your code goes here
+
+  assert(<-ch == 2)
+  assert(<-ch == 3)
+  assert(<-ch == 5)
+  assert(<-ch == 7)
+  assert(<-ch == 11)
+}

about_panics.go

@@ -0,0 +1,5 @@
+package go_koans
+
+func aboutPanics() {
+  panic("crap")
+}

setup_koans_test.go

@@ -15,6 +15,7 @@ var __int__ int = -1
 var __byte__ byte = 255
 var __bool__ bool = false // ugh
 var __float32__ float32 = -1.0
+var __delete_me__ bool = false
 
 func TestKoans(t *testing.T) {
   aboutNumbers()
@@ -31,10 +32,7 @@ func TestKoans(t *testing.T) {
   aboutPointers()
   aboutStructs()
   aboutAllocation()
-
-  // TODO: ie, gameplan
-  //aboutGoroutines()
-  //aboutChannels()
+  aboutConcurrency()
   //aboutPanics()
 
   fmt.Printf("\n%c[32;1mYou won life. Good job.\n\n", 27)