node_modules

1 files changed, 36 insertions, 0 deletions

diff --git a/node_modules/fbjs/lib/flatMapArray.js.flow b/node_modules/fbjs/lib/flatMapArray.js.flow
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+/**
+ * Copyright (c) 2013-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ *
+ * @providesModule flatMapArray
+ * @typechecks
+ */
+
+var push = Array.prototype.push;
+
+/**
+ * Applies a function to every item in an array and concatenates the resulting
+ * arrays into a single flat array.
+ *
+ * @param {array} array
+ * @param {function} fn
+ * @return {array}
+ */
+function flatMapArray(array, fn) {
+  var ret = [];
+  for (var ii = 0; ii < array.length; ii++) {
+    var result = fn.call(array, array[ii], ii);
+    if (Array.isArray(result)) {
+      push.apply(ret, result);
+    } else if (result != null) {
+      throw new TypeError('flatMapArray: Callback must return an array or null, ' + 'received "' + result + '" instead');
+    }
+  }
+  return ret;
+}
+
+module.exports = flatMapArray;
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