Question

我正在尝试添加格式：“电影”到数组中的每个对象，但我无法弄明白。

var movie = [
    {title: "A Clockwork Orange", year: "1971", raiting: "8.3", genre: "Crime, Drama, Sci-Fi"},
    {title: "Full Metal Jacket", year: "1987", raiting: "8.3", genre: " Drama, War"},
    {title: "Pulp Fiction", year: "1994", raiting: "8.9", genre: "Crime, Drama"},
    {title: "Fight Club", year: "1999", raiting: "8.8", genre: "Drama"},
    {title: "Interstellar", year: "2014", raiting: "8.6", genre: "Adventure, Drama, Sci-Fi"}
];


movie.forEach(function () {
    movie.format = "film";
});


movie.forEach(function (element) {
    console.log(element);
});

Answer 1

您需要将参数传递给function并将新属性添加到其中

movie.forEach(function (element) {
    element.format = "film";
});

Answer 2

使用goes to运算符。

var movie = [    {title: "A Clockwork Orange", year: "1971", raiting: "8.3", genre: "Crime, Drama, Sci-Fi"},    {title: "Full Metal Jacket", year: "1987", raiting: "8.3", genre: " Drama, War"},    {title: "Pulp Fiction", year: "1994", raiting: "8.9", genre: "Crime, Drama"},    {title: "Fight Club", year: "1999", raiting: "8.8", genre: "Drama"},    {title: "Interstellar", year: "2014", raiting: "8.6", genre: "Adventure, Drama, Sci-Fi"}];

let i = movie.length;
while (i --> 0) movie[i].format = 'film';
console.log(movie);

.as-console-wrapper {
  max-height: 100% !important
}

Answer 3

如果你也参加了ES6，你肯定可以用胖箭来做这件事。

movie.forEach(element => element.format = "film");

将新属性添加到现有javascript对象

3 个答案: