change params order of Insert* functions for glist; improve gstr.IsNumber

.example/container/glist/basic.go

@@ -0,0 +1,22 @@
+package main
+
+import (
+	"fmt"
+	"github.com/gogf/gf/container/glist"
+)
+
+func main() {
+	l := glist.New()
+	// Push
+	l.PushBack(1)
+	l.PushBack(2)
+	e0 := l.PushFront(0)
+	// Insert
+	l.InsertBefore(e0, -1)
+	l.InsertAfter(e0, "a")
+	fmt.Println(l)
+	// Pop
+	fmt.Println(l.PopFront())
+	fmt.Println(l.PopBack())
+	fmt.Println(l)
+}

.example/container/glist/json_marshal.go

@@ -0,0 +1,23 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"github.com/gogf/gf/container/glist"
+	"github.com/gogf/gf/frame/g"
+)
+
+func main() {
+	type Student struct {
+		Id     int
+		Name   string
+		Scores *glist.List
+	}
+	s := Student{
+		Id:     1,
+		Name:   "john",
+		Scores: glist.NewFrom(g.Slice{100, 99, 98}),
+	}
+	b, _ := json.Marshal(s)
+	fmt.Println(string(b))
+}

.example/container/glist/json_unmarshal.go

@@ -0,0 +1,19 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"github.com/gogf/gf/container/glist"
+)
+
+func main() {
+	b := []byte(`{"Id":1,"Name":"john","Scores":[100,99,98]}`)
+	type Student struct {
+		Id     int
+		Name   string
+		Scores *glist.List
+	}
+	s := Student{}
+	json.Unmarshal(b, &s)
+	fmt.Println(s)
+}