Merge 7c9a3e528e into 4b81980a1f

README.md

@@ -67,7 +67,7 @@ __Concurrency Patterns__:
 | [Bounded Parallelism](concurrency/bounded_parallelism.md) | Completes large number of independent tasks with resource limits |
 | TODO: [Broadcast](concurrency/broadcast.md) | Transfers a message to all recipients simultaneously |
 | TODO: [Coroutines](concurrency/coroutine.md) | Subroutines that allow suspending and resuming execution at certain locations |
-| TODO: [Generators](concurrency/generator.md) | Yields a sequence of values one at a time |
+| [Generators](concurrency/generator.md) | Yields a sequence of values one at a time |
 | TODO: [Reactor](concurrency/reactor.md) | Demultiplexes service requests delivered concurrently to a service handler and dispatches them syncronously to the associated request handlers |
 | [Parallelism](concurrency/parallelism.md) | Completes large number of independent tasks |
 | TODO: [Producer Consumer](concurrency/producer_consumer.md) | Separates tasks from task executions |

concurrency/generator.go

@@ -0,0 +1,24 @@
+package generator
+
+func Range(start int, end int, step int) chan int {
+	c := make(chan int)
+
+	go func() {
+		result := start
+		for result < end {
+			c <- result
+			result = result + step
+		}
+
+		close(c)
+	}()
+
+	return c
+}
+
+func main() {
+	// print the numbers from 3 through 47 with a step size of 2
+	for i := range Range(3, 47, 2) {
+		println(i)
+	}
+}

concurrency/generator.md

@@ -0,0 +1,7 @@
+# Generator Pattern
+
+[Generators](https://en.wikipedia.org/wiki/Generator_(computer_programming)) yields a sequence of values one at a time
+
+# Implementation and Example
+
+You can find the implementation and usage in [generator.go](generator.go)