add Pop/Pops functions for gset

g/container/gset/gset.go

@@ -297,8 +297,31 @@ func (set *Set) Sum() (sum int) {
 	return
 }
 
-// Join joins items with a string <glue>.
+// Pops randomly pops an item from set.
+func (set *Set) Pop(size int) interface{} {
+	set.mu.RLock()
+	defer set.mu.RUnlock()
+	for k, _ := range set.m {
+		return k
+	}
+	return nil
+}
+
+// Pops randomly pops <size> items from set.
 func (set *Set) Pops(size int) []interface{} {
-	array := make([]interface{}, 0, size)
+	set.mu.RLock()
+	defer set.mu.RUnlock()
+	if size > len(set.m) {
+		size = len(set.m)
+	}
+	index := 0
+	array := make([]interface{}, size)
+	for k, _ := range set.m {
+		array[index] = k
+		index++
+		if index == size {
+			break
+		}
+	}
 	return array
 }

g/container/gset/gset_int_set.go

@@ -289,4 +289,33 @@ func (set *IntSet) Sum() (sum int) {
 		sum += k
 	}
 	return
+}
+
+// Pops randomly pops an item from set.
+func (set *IntSet) Pop(size int) int {
+	set.mu.RLock()
+	defer set.mu.RUnlock()
+	for k, _ := range set.m {
+		return k
+	}
+	return 0
+}
+
+// Pops randomly pops <size> items from set.
+func (set *IntSet) Pops(size int) []int {
+	set.mu.RLock()
+	defer set.mu.RUnlock()
+	if size > len(set.m) {
+		size = len(set.m)
+	}
+	index := 0
+	array := make([]int, size)
+	for k, _ := range set.m {
+		array[index] = k
+		index++
+		if index == size {
+			break
+		}
+	}
+	return array
 }

g/container/gset/gset_string_set.go

@@ -290,4 +290,33 @@ func (set *StringSet) Sum() (sum int) {
 		sum += gconv.Int(k)
 	}
 	return
+}
+
+// Pops randomly pops an item from set.
+func (set *StringSet) Pop(size int) string {
+	set.mu.RLock()
+	defer set.mu.RUnlock()
+	for k, _ := range set.m {
+		return k
+	}
+	return ""
+}
+
+// Pops randomly pops <size> items from set.
+func (set *StringSet) Pops(size int) []string {
+	set.mu.RLock()
+	defer set.mu.RUnlock()
+	if size > len(set.m) {
+		size = len(set.m)
+	}
+	index := 0
+	array := make([]string, size)
+	for k, _ := range set.m {
+		array[index] = k
+		index++
+		if index == size {
+			break
+		}
+	}
+	return array
 }

geg/other/test.go

@@ -2,15 +2,10 @@ package main
 
 import (
 	"fmt"
-	"github.com/gogf/gf/g/os/gfile"
-	"time"
 )
 
 func main() {
-	go func() {
-		go func() {
-			fmt.Println("main:", gfile.MainPkgPath())
-		}()
-	}()
-	time.Sleep(time.Second)
+	array := make([]interface{}, 0, 10)
+	array[8] = 1
+	fmt.Println(array)
 }