如何为特定的javascript对象扩展数组或对象原型？

Question

说我有以下内容：

function Myobj = {
   name: "Julia",
   birthdate: "xxxx",
   genres: [],
   movies: [{title: "movie1", rating: 5, genre: "Horror"}, {title: "movie2", rating 3, genre: "Comedy"},{title: "movie3", rating 3, genre: "Comedy"}, {title: "movie4", rating 3, genre: "Comedy"}, {title: "movie5", rating 3, genre: "Horror"}]
}

我希望能够做的是具有以下功能：

Myobj.prototype.pushMovie(somejson) {
   // code to add somejson to "movies", and add the "genre" to the "genres" array
}

这样我就可以了：

obj1 = new Myobj();
obj1.pushMovie({title: "movie1", rating: 5, genre: "Horror"});

或者更好的做法是覆盖数组原型？如果是这样，是否可以给原型一个特定的数组，而不是像所有数组：

Myobj.Array.prototype.pushMovie() {
// code to inherit from regular push, and do some operation to add to "genres"
}

我不知道语法上的正确或最佳方法是什么。

Answer 1

为什么不呢？

Myobj.prototype.addMovie(somejson) {
   this.movies.push( somejson );
}
Myobj.prototype.addGenre(somejson) {
   this.genres.push( somejson );
}
Myobj.prototype.pushMovie = Myobj.prototype.addMovie;