如何检查对象数组中的键是否为空？

Question

我正在做本机应用程序的反应。我收到如下 json 响应。

[
  {
    id: '508',
    class: 'class1',
    value: '0',
    percentage: '8.90',
    color: 'black'
  },
  {
    id: '509',
    class: 'class2',
    value: '0',
    percentage: '2.40',
    color: 'black'
  },
  {
    id: '510',
    class: 'class3',
    value: '0',
    percentage: '56.40',
    color: 'black'
  },
  {
    id: '511',
    class: 'class',
    value: '0',
    percentage: '2.40',
    color: 'black'
  }
]

我必须检查所有value属性是否为空。如果全部都是空的，我必须做一些其他动作，否则条件其他动作。

  const emptyValues = sortedData.map(value => value.key);
  console.log('emptyValues data', emptyValues);

Answer 1

使用Array.every()，检查所有value键'0'（或任何你的空定义）：

const data = [{"id":"508","class":"class1","value":"0","percentage":"8.90","color":"black"},{"id":"509","class":"class2","value":"0","percentage":"2.40","color":"black"},{"id":"510","class":"class3","value":"0","percentage":"56.40","color":"black"},{"id":"511","class":"class","value":"0","percentage":"2.40","color":"black"}]

const doEmptyAction = data.every(o => o.value === '0')

console.log(doEmptyAction)