lorenmh · February 7, 2018 19:39 · Feb 7, 2018
diff --git a/echoGenerator.js b/echoGenerator.js
@@ -0,0 +1,40 @@
+function* echoGenerator() {
+  let received = null;
+
+  while (true) {
+    received = yield received;
+
+    if (received === null) return;
+
+    received = 'ECHO ' + received;
+  }
+}
+
+messages = ['hello', 'these', 'are', 'some', 'messages', null];
+
+let echo = echoGenerator();
+
+for (message of messages) {
+  console.log(`Sending: ${message}`);
+  let received = echo.next(message);
+
+  if (received.done) {
+    console.log('Done receiving');
+    break;
+  }
+
+  console.log(`Received: ${received.value}`);
+}
+
+// Sending: hello
+// Received: null
+// Sending: these
+// Received: ECHO these
+// Sending: are
+// Received: ECHO are
+// Sending: some
+// Received: ECHO some
+// Sending: messages
+// Received: ECHO messages
+// Sending: null
+// Done receiving
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