Examples for yield and return

Author: tshemsedinov

JavaScript/b-yield.js

@@ -0,0 +1,16 @@
+'use strict';
+
+function* counter(begin, end, delta) {
+  let value = begin;
+  while (end > value) {
+    value += delta;
+    yield value;
+  }
+}
+
+const c = counter(0, 30, 12);
+const val1 = c.next();
+const val2 = c.next();
+const val3 = c.next();
+const val4 = c.next();
+console.log({ c, val1, val2, val3, val4 });

JavaScript/c-return.js

@@ -0,0 +1,17 @@
+'use strict';
+
+function* ids(...args) {
+  let i = 0;
+  while (args.length > i) {
+    const id = args[i++];
+    if (id === undefined) return -1;
+    yield id;
+  }
+}
+
+const id = ids(1011, 1078, 1292, 1731, undefined, 1501, 1550);
+let val;
+do {
+  val = id.next();
+  console.log({ val });
+} while (!val.done);