isArguments_.isArguments(object) Returns true if object is an Arguments object.

isEmpty_.isEmpty(object) Returns true if an enumerable object contains no values (no enumerable own-properties). For

isFunction_.isFunction(object) Returns true if object is a Function.

pick_.pick(object, *keys) Return a copy of the object, filtered to only have values for the whitelisted keys (or array

defaults_.defaults(object, *defaults) Fill in undefined properties in object with the first value present in the

extend_.extend(destination, *sources) Copy all of the properties in the source objects over to the destination

matcher_.matcher(attrs) Alias: matches Returns a predicate function that will tell you if a passed

extendOwn_.extendOwn(destination, *sources) Alias: assign Like extend, but only copies own

isRegExp_.isRegExp(object) Returns true if object is a RegExp.

isEqual_.isEqual(object, other) Performs an optimized deep comparison between the two objects, to determine if they should be considered