dimpiax · September 19, 2017 16:23 · Sep 19, 2017 · Sep 19, 2017 · Sep 19, 2017
diff --git a/promiseUtils.js b/promiseUtils.js
@@ -24,5 +24,5 @@ const result = await sync([1000, 500], async (value) => {
     return res
 })
 
-console.log(result) // [2000, 500] after 1500 ms
+console.log(result) // [2000, 1000] after 1500 ms
 */
diff --git a/promiseUtils.js b/promiseUtils.js
@@ -1,5 +1,3 @@
-/* @flow */
-
 const next = async (it, callback) => {
     const { value, done } = it.next()
     if (done) return []

diff --git a/promiseUtils.js b/promiseUtils.js
@@ -0,0 +1,30 @@
+/* @flow */
+
+const next = async (it, callback) => {
+    const { value, done } = it.next()
+    if (done) return []
+
+    const result = await callback(value)
+    const nextResult = await next(it, callback)
+    return [result, ...nextResult]
+}
+
+const sync = async (value, callback) => {
+    const it = value[Symbol.iterator]()
+    const res = await next(it, callback)
+    return res
+}
+
+export default {
+    sync
+}
+
+// Usage: 
+/**
+const result = await sync([1000, 500], async (value) => {
+    const res = await new Promise((res) => { setTimeout(res, value, value * 2) })
+    return res
+})
+
+console.log(result) // [2000, 500] after 1500 ms
+*/