initial update

node_modules/graphql/jsutils/promiseReduce.js

@@ -0,0 +1,27 @@
+'use strict';
+
+Object.defineProperty(exports, '__esModule', {
+  value: true,
+});
+exports.promiseReduce = promiseReduce;
+
+var _isPromise = require('./isPromise.js');
+
+/**
+ * Similar to Array.prototype.reduce(), however the reducing callback may return
+ * a Promise, in which case reduction will continue after each promise resolves.
+ *
+ * If the callback does not return a Promise, then this function will also not
+ * return a Promise.
+ */
+function promiseReduce(values, callbackFn, initialValue) {
+  let accumulator = initialValue;
+
+  for (const value of values) {
+    accumulator = (0, _isPromise.isPromise)(accumulator)
+      ? accumulator.then((resolved) => callbackFn(resolved, value))
+      : callbackFn(accumulator, value);
+  }
+
+  return accumulator;
+}