kmarsh · August 19, 2014 15:32 · Aug 19, 2014
diff --git a/gistfile1.js b/gistfile1.js
@@ -0,0 +1,37 @@
+var isFunction = function(o) {
+  return typeof o == 'function';
+};
+
+
+var bind,
+  slice = [].slice,
+  proto = Function.prototype,
+  featureMap;
+
+featureMap = {
+  'function-bind': 'bind'
+};
+
+function has(feature) {
+  var prop = featureMap[feature];
+  return isFunction(proto[prop]);
+}
+
+// check for missing features
+if (!has('function-bind')) {
+  // adapted from Mozilla Developer Network example at
+  // https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Function/bind
+  bind = function bind(obj) {
+    var args = slice.call(arguments, 1),
+      self = this,
+      nop = function() {
+      },
+      bound = function() {
+        return self.apply(this instanceof nop ? this : (obj || {}), args.concat(slice.call(arguments)));
+      };
+    nop.prototype = this.prototype || {}; // Firefox cries sometimes if prototype is undefined
+    bound.prototype = new nop();
+    return bound;
+  };
+  proto.bind = bind;
+}