在JSON数组中按属性查找对象 [英] Find object by property in JSON array

问题描述

我在JSON数据中获取字符串时遇到问题.格式如下:

I have problem with get string in JSON data. Format as below:

[
  {
    "name": "Alice",
    "age": "20"
  },
  {
    "id": "David",
    "last": "25"
  },
  {
    "id": "John",
    "last": "30"
  }
]

有时它会一起改变位置，John从第三名转到第二名:

Sometime it changes position together, John from 3rd place go to 2nd place:

[
  {
    "name": "Alice",
    "age": "20"
  },
  {
    "name": "John",
    "age": "30"
  },
  {
    "name": "David",
    "age": "25"
  }
]

如果我使用data[3].age获取John的年龄，并更改数据位置，我将获取David的年龄.

If i use data[3].age to get John's age, and data change position, I will get David's age.

我可以使用任何方法用name David查找对象并获取age值吗?

Is there any method I can use to find the object with name David and get the age value?

推荐答案

您可以使用

var myArray = [
  {
    "name": "Alice",
    "age": "20"
  },
  {
    "name": "John",
    "age": "30"
  },
  {
    "name": "David",
    "age": "25"
  }
];

//Here you are passing the parameter name and getting the age 
//Find will get you the first matching object
var result = myArray.find(t=>t.name ==='John').age;
console.log(result);

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