Question

我有一个代码可以生成像这样的数组对象

[{
    "invoiceNumber": "INV-056",
    "invoiceDate": "2018-06-19",
    "jobCardNumber": "JC-018",
    "tax": 43323,
  }, {
    "invoiceNumber": "INV-056",
    "invoiceDate": "2018-06-19",
    "jobCardNumber": "JC-018",
    "tax": 213,
    "part@18%": 140.04,
    "part@12%": 140.04,
    "part@9%": 140.04,
    "labour@18%": 140.04,
    "offer@12%": 140.04,
    "offer@9%": 140.04,
  }, {
    "invoiceNumber": "INV-056",
    "invoiceDate": "2018-06-19",
    "jobCardNumber": "JC-018",
    "tax": 213,
  },
  {
    "invoiceNumber": "INV-056",
    "invoiceDate": "2018-06-19",
    "jobCardNumber": "JC-018",
    "tax": 213,
    "part@9%": 140.04,
    "labour@18%": 140.04,
    "offer@12%": 140.04,
  }
]

part @，labour @和offer @键是动态的。我想要数组对象中的所有键。我想要的结果是

[ '发票号码'， '发票日期'， 'jobCardNumber'， '税'， 'part @ 18％'， “ part @ 12％”， “ part @ 9％”， '人工@ 18％'， “ offer @ 12％”， “优惠@ 9％” ]

Answer 1

您可以使用Array.prototype.reduce遍历对象并将其键添加到Set：

var data=[{invoiceNumber:"INV-056",invoiceDate:"2018-06-19",jobCardNumber:"JC-018",tax:43323},{invoiceNumber:"INV-056",invoiceDate:"2018-06-19",jobCardNumber:"JC-018",tax:213,"part@18%":140.04,"part@12%":140.04,"part@9%":140.04,"labour@18%":140.04,"offer@12%":140.04,"offer@9%":140.04},{invoiceNumber:"INV-056",invoiceDate:"2018-06-19",jobCardNumber:"JC-018",tax:213},{invoiceNumber:"INV-056",invoiceDate:"2018-06-19",jobCardNumber:"JC-018",tax:213,"part@9%":140.04,"labour@18%":140.04,"offer@12%":140.04}];

var result = [...data.reduce((all, el) => (Object.keys(el).forEach(k => all.add(k)),all), new Set)];

console.log(result);

从动态生成的数组对象中查找键

1 个答案: