Question

在Javascript中，有没有办法根据数组中的值过滤JSON文件？

例如，使用以下数组：

["c", "f"]

和JSON目标文件：

[{
    "a": 1,
    "b": 2,
    "c": 3,
    "d": 4,
    "e": 5,
    "f": 6

},{
    "a": 2,
    "b": 4,
    "c": 6,
    "d": 8,
    "e": 10,
    "f": 12
}]

我想生成以下结果：

[{
    "c": 3,
    "f": 6
},{
    "c": 6,
    "f": 12
}]

Answer 1

您可以映射新对象的给定键的值。

＆＃13;

var keys = ["c", "f"],
    data = [{ a: 1, b: 2, c: 3, d: 4, e: 5, f: 6 }, { a: 2, b: 4, c: 6, d: 8, e: 10, f: 12 }],
    filtered = data.map(o => Object.assign(...keys.map(k => ({ [k]: o[k] }))));

console.log(filtered);

＆＃13;

Answer 2

您可以使用map()和reduce()。

＆＃13;

var keys = ["c", "f"];
var arr = [{"a":1,"b":2,"c":3,"d":4,"e":5,"f":6},{"a":2,"b":4,"c":6,"d":8,"e":10,"f":12}];

var result = arr.map(o => {
  return keys.reduce((r, k) => (o[k] && (r[k] = o[k]), r), {})
})

console.log(result)

＆＃13;

根据数组中的值过滤JSON数据

2 个答案: