如何查看某个值是否存在于对象数组中？

Question

我想看看是否有办法查看对象数组中是否存在某个值。

这是我的尝试，但它一直打印错误，解决这个问题的最有效方法是什么？

我的尝试

var dog_database = [
  {"dog_name": "Joey", "chip_id": "001", "breed": "mixed"},
  {"dog_name": "Max", "chip_id": "002", "breed": "beagle"},
  {"dog_name": "Izzy", "chip_id": "003", "breed": "mixed"},
  {"dog_name": "Frankie", "chip_id": "004", "breed": "terrier"},
  {"dog_name": "Star", "chip_id": "005", "breed": "husky"},
  {"dog_name": "Goku", "chip_id": "006", "breed": "lab"}
];

wanted_value = "mixed";

var isPresent = Object.keys(dog_database).some(function(k) {
  Object.keys(dog_database[k]).some(function(i) {
    if (dog_database[k][i] == wanted_value) {
      return true;
    } else {
      return false;
    }
  });
});


console.log(isPresent);

Answer 1

这个要你要吗？使用 Array.prototype.some 检查值是否存在。

var dog_database = [{
    "dog_name": "Joey", "chip_id": "001", "breed": "mixed"
  },
  {
    "dog_name": "Max", "chip_id": "002", "breed": "beagle"
  },
  {
    "dog_name": "Izzy", "chip_id": "003", "breed": "mixed"
  },
  {
    "dog_name": "Frankie", "chip_id": "004", "breed": "terrier"
  },
  {
    "dog_name": "Star", "chip_id": "005", "breed": "husky"
  },
  {
    "dog_name": "Goku", "chip_id": "006", "breed": "lab"
  }
];

wanted_value = "mixed";

var isPresent = dog_database.some(dog => dog.breed === wanted_value)

console.log(isPresent);

如何查看某个值是否存在于对象数组中？

How can I see if a value is present in an array of objects?

javascript

javascript-objects