clone_.clone(object) Create a shallow-copied clone of the provided plain object. Any nested objects or arrays will

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

isMatch_.isMatch(object, properties) Tells you if the keys and values in properties are contained in object.

isBoolean_.isBoolean(object) Returns true if object is either true or false.

pairs_.pairs(object) Convert an object into a list of [key, value] pairs.

has_.has(object, key) Does the object contain the given key? Identical to object.hasOwnProperty(key), but uses a safe reference

isNaN_.isNaN(object) Returns true if object is NaN. Note: this is not the same as the native isNaN

isUndefined_.isUndefined(value) Returns true if value is undefined.

isNull_.isNull(object) Returns true if the value of object is null.

isString_.isString(object) Returns true if object is a String.