func InitBySlice(s []int) *List {
	l := &List{}
	l.PushBackSlice(s)
	return l
}
//InitBySlice returns an initialized list.

InitBySlice returns an initialized list.
// InitBySlice returns an initialized list .
func InitBySlice(s []int) *List {
	l := &List{}
	l.PushBackSlice(s)
	return l
}
func InitBySlice ( s [ ] int ) * List { l := & List { } l . PushBackSlice ( s ) return l }
InitBySlice returns an initialized list.
InitBySlice returns an initialized list .