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1 files changed, 17 insertions, 0 deletions

diff --git a/node_modules/es5-ext/object/key-of.js b/node_modules/es5-ext/object/key-of.js
new file mode 100644
index 00000000..dc640e4d
--- /dev/null
+++ b/node_modules/es5-ext/object/key-of.js
@@ -0,0 +1,17 @@
+"use strict";
+
+var eq   = require("./eq")
+  , some = require("./some");
+
+module.exports = function (obj, searchValue) {
+	var result;
+	return some(obj, function (value, name) {
+		if (eq(value, searchValue)) {
+			result = name;
+			return true;
+		}
+		return false;
+	})
+		? result
+		: null;
+};