improve example codes

.example/container/garray/basic_array.go

@@ -0,0 +1,46 @@
+package main
+
+import (
+	"fmt"
+
+	"github.com/gogf/gf/container/garray"
+)
+
+func main() {
+	// Create a int array, which is concurrent-unsafe in default.
+	a := garray.NewIntArray()
+
+	// Appending items.
+	for i := 0; i < 10; i++ {
+		a.Append(i)
+	}
+
+	// Get the length of the array.
+	fmt.Println(a.Len())
+
+	// Get the slice of the array.
+	fmt.Println(a.Slice())
+
+	// Get the item of specified index.
+	fmt.Println(a.Get(6))
+
+	// Insert after/before specified index.
+	a.InsertAfter(9, 11)
+	a.InsertBefore(10, 10)
+	fmt.Println(a.Slice())
+
+	a.Set(0, 100)
+	fmt.Println(a.Slice())
+
+	// Searching the item and returning the index.
+	fmt.Println(a.Search(5))
+
+	// Remove item of specified index.
+	a.Remove(0)
+	fmt.Println(a.Slice())
+
+	// Clearing the array.
+	fmt.Println(a.Slice())
+	a.Clear()
+	fmt.Println(a.Slice())
+}