5 Model Programs

302 Modeling Library ReferenceCountReturns the number of elements in the value array.IsEmptyReturns true if the value array has no elements. Returns false otherwise.Item(int)Lengthetc. . . .A.2.6BagBagAn unordered collection of possibly repeating elements. This is also known as amultiset. The type is immutable; add/remove methods return a new bag.Syntaxpublic sealed class Bag : CollectionValueConstructorsBag()Constructs an empty bag. The static field Bag.EmptyBag is preferred insteadof using this form of the constructor.Bag(IEnumerable)Constructs a bag with elements taken from a collection. The Count of the resultingbag will be the same as the number of values in the collection given as theargument.Bag(T[])Constructs a bag with elements given as params arguments. The Count of thebag will be the same as the number of arguments to the constructor.Bag(IEnumerable)Constructs a bag with elements and their corresponding multiplicities given asa pair enumeration.Bag(Pair[])Constructs a bag with params arguments that are pairs of elements and theircorresponding multiplicities.MethodsThe following entries describe some of the methods of this type. Many more aredescribed in the library documentation.