如何检查数组是否包含特定对象 [英] How to check if array contains specific object

问题描述

我正在尝试检查对象数组是否包含特定对象或具有特定属性的对象。

I am trying to check if array of objects contain a specific object or object with specific property.

var mainArray = [
{name:"Yahya", age:"29"},
{name:"Ahmed", age:"19"},
{name:"Mohamed", age:"10"},
{name:"Ali", age:"32"},
{name:"Mona", age:"25"},
{name:"Shady", age:"62"},
{name:"Reem", age:"11"},
{name:"Marwa", age:"52"}
]

var myObject = {name:"Yahya", age:"29"};

function check() {
if (mainArray.indexOf(myObject) > -1) {
  console.log("true")
  return true;
} else {
  console.log('false')
  return false;
}
};

<button onClick="check()">Check</button>

这里的对象与数组对象之一相同。但返回false。我尝试过的
包含在内，也无法正常工作。

here's however the object is same as one of array objects . but it's return false . I tried includes, also not working.

推荐答案

如果要检查对象数组是否包含特定的对象，则可以使用 Array.some

If you wish to check if the array of objects contain that specific object then you can use Array.some

var mainArray = [{
    name: "Yahya",
    age: "29"
  },
  {
    name: "Ahmed",
    age: "19"
  },
  {
    name: "Mohamed",
    age: "10"
  },
  {
    name: "Ali",
    age: "32"
  },
  {
    name: "Mona",
    age: "25"
  },
  {
    name: "Shady",
    age: "62"
  },
  {
    name: "Reem",
    age: "11"
  },
  {
    name: "Marwa",
    age: "52"
  }
]

var myObject = {
  name: "Yahya",
  age: "29"
};

let ans = mainArray.some(function(arrVal) {
  return myObject.name === arrVal.name;
});
console.log(ans)

您也可以使用 filter 方法。在这种情况下，它将返回一个数组计划元素。检查返回数组的长度，以验证它是否包含所需元素

You can also use filter method.In this case it will return an array of the matched elements. Check the length of the returned array to verify if it contains desired elements

var mainArray = [{
    name: "Yahya",
    age: "29"
  },
  {
    name: "Ahmed",
    age: "19"
  },
  {
    name: "Mohamed",
    age: "10"
  },
  {
    name: "Ali",
    age: "32"
  },
  {
    name: "Mona",
    age: "25"
  },
  {
    name: "Shady",
    age: "62"
  },
  {
    name: "Reem",
    age: "11"
  },
  {
    name: "Marwa",
    age: "52"
  }
]

var myObject = {
  name: "Yahya",
  age: "29"
};

let newAns = mainArray.filter(function(item) {
  return item.name === myObject.name && item.age === myObject.age
})
if (newAns.length > 0) {
  console.log(true);
} else {
  console.log(false)
}

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