add examples for rest

Author: orsinium

.gitignore

@@ -5,3 +5,4 @@ __pycache__/
 .vscode
 .swp
 *~
+.task

README.md

@@ -72,9 +72,10 @@ codes := slices.MapAsync(
 
 Genesis contains the following packages:
 
-+ [🍞 slices](https://pkg.go.dev/github.com/life4/genesis/slices): generic functions for slices.
-+ [🗺 maps](https://pkg.go.dev/github.com/life4/genesis/maps): generic functions for maps.
-+ [📺 channels](https://pkg.go.dev/github.com/life4/genesis/channels): generic function for channels.
++ [🍞 slices](https://pkg.go.dev/github.com/life4/genesis/slices): generic functions for slices (`[]T`).
++ [🗺 maps](https://pkg.go.dev/github.com/life4/genesis/maps): generic functions for maps (`map[K]V`).
++ [📺 channels](https://pkg.go.dev/github.com/life4/genesis/channels): generic function for channels (`chan T`).
++ [⚙️ sets](https://pkg.go.dev/github.com/life4/genesis/sets): generic function for sets (`map[T]struct{}`).
 + [🛟 lambdas](https://pkg.go.dev/github.com/life4/genesis/lambdas): helper generic functions to work with `slices.Map` and similar.
 
 See [📄 DOCUMENTATION](https://pkg.go.dev/github.com/life4/genesis) for more info.

doc.go

@@ -6,5 +6,6 @@ import (
 	_ "github.com/life4/genesis/channels"
 	_ "github.com/life4/genesis/lambdas"
 	_ "github.com/life4/genesis/maps"
+	_ "github.com/life4/genesis/sets"
 	_ "github.com/life4/genesis/slices"
 )

sets/example_test.go

@@ -62,6 +62,28 @@ func ExampleIntersect() {
 	// Output: true
 }
 
+func ExampleMax() {
+	s := sets.New(3, 6, 4, 5)
+	result, _ := sets.Max(s)
+	fmt.Println(result)
+	// Output: 6
+}
+
+func ExampleMin() {
+	s := sets.New(4, 5, 3, 6)
+	result, _ := sets.Min(s)
+	fmt.Println(result)
+	// Output: 3
+}
+
+func ExampleReduce() {
+	s := sets.New(3, 4, 5)
+	add := func(x, acc int) int { return x + acc }
+	result := sets.Reduce(s, 0, add)
+	fmt.Println(result)
+	// Output: 12
+}
+
 func ExampleSubset() {
 	a := sets.New(4, 5)
 	b := sets.New(3, 4, 5, 6)
@@ -70,6 +92,20 @@ func ExampleSubset() {
 	// Output: true
 }
 
+func ExampleSum() {
+	s := sets.New(3, 4, 5)
+	result := sets.Sum(s)
+	fmt.Println(result)
+	// Output: 12
+}
+
+func ExampleToSlice() {
+	s := sets.New(3)
+	result := sets.ToSlice(s)
+	fmt.Println(result)
+	// Output: [3]
+}
+
 func ExampleSuperset() {
 	a := sets.New(3, 4, 5, 6)
 	b := sets.New(4, 5)