vue.js 配列更新の例の共有

computed:{
       filterBooks(){
            return this.books.filter(function(book){
                return book.name.match(/javascript/)
            })
        },
        sortBooks(){
            return this.lists.sort(function (a,b) {
                return a.name.length<b.name.length
            })
        }
}

mounted(){
   this.books.push({              //push数组方法,视图直接改变
            name:'《css3实战》',
            author:'huiyh'
        });
        this.books=this.books.concat([{  //concat数组方法，需更新原数组
            name:'《html5实战》',
            author:'lala'
        }])
}