From c3358a0bd6a6f284ca5bea5f88e08e6789109b57 Mon Sep 17 00:00:00 2001
From: charlie <3140647@qq.com>
Date: Wed, 4 May 2022 23:45:53 +0800
Subject: [PATCH] set

---
 sets/hash_set.go   | 72 ++++++++++++++++++++++++++++++++++++++++++++++
 sets/set.go        |  4 +++
 sets/sorted_set.go |  8 ++++++
 3 files changed, 84 insertions(+)
 create mode 100644 sets/hash_set.go
 create mode 100644 sets/set.go
 create mode 100644 sets/sorted_set.go

diff --git a/sets/hash_set.go b/sets/hash_set.go
new file mode 100644
index 0000000..66e6452
--- /dev/null
+++ b/sets/hash_set.go
@@ -0,0 +1,72 @@
+package sets
+
+type hash_set[T comparable] map[T]struct{}
+
+func NewHashSet[T comparable](values ...T) hash_set[T] {
+	set := make(hash_set[T], len(values))
+	set.Add(values...)
+	return set
+}
+
+func (s hash_set[T]) Add(values ...T) {
+	for _, v := range values {
+		s[v] = struct{}{}
+	}
+}
+
+func (s hash_set[T]) Remove(v T) {
+	delete(s, v)
+}
+
+func (s hash_set[T]) Contain(value T) bool {
+	_, ok := s[value]
+	return ok
+}
+
+func (s hash_set[T]) Clone() hash_set[T] {
+	set := NewHashSet[T]()
+	set.Add(s.Values()...)
+	return set
+}
+
+func (s hash_set[T]) Iterate(fn func(value T)) {
+	for v := range s {
+		fn(v)
+	}
+}
+
+// Union creates a new set contain all element of set s and other
+func (s hash_set[T]) Union(other hash_set[T]) hash_set[T] {
+	set := s.Clone()
+	set.Add(other.Values()...)
+	return set
+}
+
+// Intersection creates a new set whose element both be contained in set s and other
+func (s hash_set[T]) Intersection(other hash_set[T]) hash_set[T] {
+	set := NewHashSet[T]()
+	s.Iterate(func(value T) {
+		if other.Contain(value) {
+			set.Add(value)
+		}
+	})
+
+	return set
+}
+
+func (s hash_set[T]) Values() []T {
+	values := make([]T, 0, s.Size())
+	s.Iterate(func(value T) {
+		values = append(values, value)
+	})
+
+	return values
+}
+
+func (s hash_set[T]) IsEmpty() bool {
+	return len(s) == 0
+}
+
+func (s hash_set[T]) Size() int {
+	return len(s)
+}
diff --git a/sets/set.go b/sets/set.go
new file mode 100644
index 0000000..fba7e98
--- /dev/null
+++ b/sets/set.go
@@ -0,0 +1,4 @@
+package sets
+
+type Set[T comparable] interface {
+}
diff --git a/sets/sorted_set.go b/sets/sorted_set.go
new file mode 100644
index 0000000..7c9d6e4
--- /dev/null
+++ b/sets/sorted_set.go
@@ -0,0 +1,8 @@
+package sets
+
+type sorted_set[T comparable] struct {
+	sorted []T
+	set    Set[T]
+}
+
+