Question

我要引入一个对象，当我执行console.log（）时，该对象将以以下格式返回数据：

{PerformanceYear:
  [{2020: "2020", checked: false}
   {2019: "2019", checked: true}
   {2018: "2018", checked: false}
   {2017: "2017", checked: false}
  ],
 Region: 
  [{1: "WA", checked: true}
   {2: "OR", checked: false}
   {3: "MT", checked: false}
   {4: "Other", checked: false}
  ],
 Service Area:
  [{5: "Northwest", checked: false}
   {6: "Southwest", checked: true}
   {7: "Southeast", checked: true}
   {8: "Other", checked: false}
  ],
}

（因此整个数据集是一个对象，而不是数组）

我正在尝试过滤，但这只能在数组上完成，因此我使用Object.entries（）将其转换为数组。唯一的问题是，PerformanceYear，Region和Service Area中的每个也都变成了自己的单独数组，因此当我尝试这样做时：

var filtered = []; for (var i = 0; i < entries.length; i++) { for (var x = 0; x < entries[i][1].length; x++) if (entries[i][1][x].checked === true) { filtered.push(entries[i][1][x]); } } console.log(filtered)

我明白了：

[{2019: "2019", checked: true}, {1: "WA", checked: true}, {6: "Southwest", checked: true}, {7: "Southeast", checked: true} ]

我想要得到的是这样的：

[PerformanceYear: {2019: "2019", checked: true}, Region: {1: "WA", checked: true}, Service Area: {6: "Southwest", checked: true}, {7: "Southeast", checked: true} ]

如果我尝试了filtered.push（entries [i] [1]），它不会过滤掉选中的===假值。有没有一种方法可以过滤原始对象而不将其变成数组？还是有一种方法可以在不使用array.entries（）的情况下将原始对象变成数组？我已经为此工作了两天，但似乎并没有取得太大进展。 TIA！

Answer 1

假设您想保留外键，则可以获取条目并过滤数组。

var data = { PerformanceYear: [{ 2020: "2020", checked: false }, { 2019: "2019", checked: true }, { 2018: "2018", checked: false }, { 2017: "2017", checked: false }], Region: [{ 1: "WA", checked: true }, { 2: "OR", checked: false }, { 3: "MT", checked: false }, { 4: "Other", checked: false }], ServiceArea: [{ 5: "Northwest", checked: false }, { 6: "Southwest", checked: true }, { 7: "Southeast", checked: true }, { 8: "Other", checked: false }] },
    result = Object.fromEntries(Object
        .entries(data)
        .map(([k, a]) => [k, a.filter(({ checked }) => checked)])
    );

console.log(result);

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Object.entries（）将键转换为数组

1 个答案: