identity_.identity(value) Returns the same value that is used as the argument. In math: f(x) = x This function looks

every_.every(list, [predicate], [context]) Alias: all Returns true if all of the values

sample_.sample(list, [n]) Produce a random sample from the list. Pass a number to return n random elements from the

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

invoke_.invoke(list, methodName, *arguments) Calls the method named by methodName on each value in the list. Any extra

propertyOf_.propertyOf(object) Inverse of _.property. Takes an object and returns a function which will return the value

property_.property(key) Returns a function that will itself return the key property of any passed-in object.

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