Jquery 如何在 JavaScript 中的对象数组中查找值

发布于03月03日

I have an array of objects:

Object = {
   1 : { name : bob , dinner : pizza },
   2 : { name : john , dinner : sushi },
   3 : { name : larry, dinner : hummus }
}

我希望能够在对象/数组中搜索关键字"晚餐"的位置，并查看它是否与"寿司"匹配.

我知道jQuery有美元.inArray，但它似乎不适用于对象array.也许我错了.indexOf似乎也只能在一个数组级别上工作.

Is there no function or existing code for this?

推荐答案

If you have an array such as

var people = [
  { "name": "bob", "dinner": "pizza" },
  { "name": "john", "dinner": "sushi" },
  { "name": "larry", "dinner": "hummus" }
];

您可以使用Array对象的filter方法:

people.filter(function (person) { return person.dinner == "sushi" });
  // => [{ "name": "john", "dinner": "sushi" }]

In newer JavaScript implementations you can use a function expression:

people.filter(p => p.dinner == "sushi")
  // => [{ "name": "john", "dinner": "sushi" }]

你可以用map搜索拥有"dinner": "sushi"的人

people.map(function (person) {
  if (person.dinner == "sushi") {
    return person
  } else {
    return null
  }
}); // => [null, { "name": "john", "dinner": "sushi" }, null]

or a reduce

people.reduce(function (sushiPeople, person) {
  if (person.dinner == "sushi") {
    return sushiPeople.concat(person);
  } else {
    return sushiPeople
  }
}, []); // => [{ "name": "john", "dinner": "sushi" }]

我确信您能够将其概括为任意键和值！