Set

type Interface ¶

type Interface interface {
	Add(item interface{}) Interface
	Delete(item interface{}) Interface
	Has(item interface{}) bool
	Len() int
	IsEmpty() bool
	Each(fn func(item interface{}) Result.Interface) Result.Interface
	ToArray() Array.Interface
	Union(other Interface) Interface
	Intersection(other Interface) Interface
	Difference(other Interface) Interface
	IsSubset(other Interface) bool
	Equal(other Interface) bool
	IsNull() bool
}

Interface is the public contract of a Set composite — an unordered collection of unique items, the go-composites sibling of Array (with which it shares the Each/ToArray grammar). Items are arbitrary comparable values (a Set is backed by a Go map, so each item must be comparable, exactly like a Dictionary key). Membership tests return a plain bool, fallible iteration returns a Result, and every method honours the Null-Object invariant (never nil).

func New(items ...interface{}) Interface

func Null() Interface