feat: 增加了集合方法 差集、对称差集、交集 (#77)

sliceUtil/setof_example_test.go

@@ -0,0 +1,39 @@
+package sliceUtil
+
+import "fmt"
+
+func ExampleDiff() {
+	s1 := []int64{1, 2, 5, 7}
+	s2 := []int64{5, 6, 7}
+
+	diff := Diff(s1, s2)
+	fmt.Println(diff)
+
+	// Output:
+	// [1 2]
+}
+
+// 演示 SymmetricDiff 函数的用法
+func ExampleSymmetricDiff() {
+	s1 := []int64{1, 5, 7}
+	s2 := []int64{5, 6, 7, 8, 9}
+	s3 := []int64{9, 10, 11}
+
+	diff := SymmetricDiff(s1, s2, s3)
+	fmt.Println(diff)
+
+	// Output:
+	// [1 6 8 10 11]
+}
+
+// 演示 ExampleIntersect 函数的用法
+func ExampleIntersect() {
+	s1 := []int64{1, 5, 7}
+	s2 := []int64{5, 6, 7, 8, 9}
+
+	diff := Intersect(s1, s2)
+	fmt.Println(diff)
+
+	// Output:
+	// [5 7]
+}