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

isDate_.isDate(object) Returns true if object is a Date.

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

findKey_.findKey(object, predicate, [context]) Similar to _

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

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

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

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

tap_.tap(object, interceptor) Invokes interceptor with the object, and then returns object. The primary purpose

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