关于append删除切片中的某个元素
a1 := [...]int{1,3,5,7,9,11,13,15,17}
s1 = a1[:]
删掉3 5
s1 = append(s1[:1],s1[3:5]...)
fmt.Printf("s1=%v len(s1)=%d cap(s1)=%d\n",s1,len(s1),cap(s1))
//s1=[1 7 9] len(s1)=3 cap(s1)=9
fmt.Printf("a1=%v len(a1)=%d cap(a1)=%d\n",a1,len(a1),cap(a1))
//a1=[1 7 9 7 9 11 13 15 17] len(a1)=9 cap(a1)=9
