more work

node_modules/lodash/lang/isFunction.js

@@ -0,0 +1,42 @@
+var baseIsFunction = require('../internal/baseIsFunction'),
+    isNative = require('./isNative');
+
+/** `Object#toString` result references. */
+var funcTag = '[object Function]';
+
+/** Used for native method references. */
+var objectProto = Object.prototype;
+
+/**
+ * Used to resolve the [`toStringTag`](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-object.prototype.tostring)
+ * of values.
+ */
+var objToString = objectProto.toString;
+
+/** Native method references. */
+var Uint8Array = isNative(Uint8Array = global.Uint8Array) && Uint8Array;
+
+/**
+ * Checks if `value` is classified as a `Function` object.
+ *
+ * @static
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+ * @example
+ *
+ * _.isFunction(_);
+ * // => true
+ *
+ * _.isFunction(/abc/);
+ * // => false
+ */
+var isFunction = !(baseIsFunction(/x/) || (Uint8Array && !baseIsFunction(Uint8Array))) ? baseIsFunction : function(value) {
+  // The use of `Object#toString` avoids issues with the `typeof` operator
+  // in older versions of Chrome and Safari which return 'function' for regexes
+  // and Safari 8 equivalents which return 'object' for typed array constructors.
+  return objToString.call(value) == funcTag;
+};
+
+module.exports = isFunction;