javascript - 如何从 json 中获取准确的值计数

Question

我有一个这样的 json 数据。我想要我的 json 中“通过”值的确切计数。

[{
    "Status1" : "pass",
    "Status2" : "Fail",
    "Status3" : "Ready"
},{
    "Status1" : "Fail",
    "Status2" : "pass",
    "Status3" : "Ready"
},{
    "Status1" : "pass",
    "Status2" : "Fail",
    "Status3" : "pass"
},{
    "Status1" : "pass",
    "Status2" : "Fail",
    "Status3" : "Ready"
}]

这是我尝试失败的原因。

var count = 0;
for(var pass in json)
    if(json.hasOwnProperty(pass))
        count++;

Answer 1

您可以根据对象是否包含任何值为“pass”的属性来过滤对象。像这样:

const data = [{
  "Status1" : "pass",
  "Status2" : "Fail",
  "Status3" : "Ready"
},{
  "Status1" : "Fail",
  "Status2" : "pass",
  "Status3" : "Ready"
},{
  "Status1" : "pass",
  "Status2" : "Fail",
  "Status3" : "pass"
},{
  "Status1" : "pass",
  "Status2" : "Fail",
  "Status3" : "Ready"
}]

const count = data.filter(obj => Object.keys(obj).some(key => {
  return obj[key] === 'pass'
})).length

console.log(count)

有用的方法:

• > Object.keys
• > Array.prototype.filter
• > Array.prototype.some