Question

这是我的数组：

const ids = [
  "id1",
  "id2",
  "id3"
]

通过cookie提取的对象

const data = [
    {
      id: "id3" // dynamically populated and can vary, we need this property
      prop2: "prop2", // not needed
      prop3: "prop3" // not needed
    }
]

如何比较第一个数组值-ids与data.id，如果true，则显示一些逻辑（例如-console.log(true)？我在{{ 1}}。

请注意该if statement。可以是data.id到id1之间的任何内容。我需要找到一种动态比较这些值的方法。在“现实世界”中，它id3所做的任何事情都1，但这只是该示例的模型。

我还要感谢Lodash的例子。

Answer 1

您可以迭代Array中所有作为对象的元素，并使用Object.keys，迭代该对象中可以与初始值数组进行比较的所有键。

const ids = [
  "id1",
  "id2",
  "id3"
];

const data = [{
  id: "id3", // dynamically populated and can vary, we need this property
  prop2: "prop2", // not needed
  prop3: "prop3" // not needed
}];

const foundElems = [];
data.forEach((el) => {
  Object.keys(el).forEach(elem => {
    if (ids.indexOf(el[elem]) > -1) {
      var Obj = {};
      Obj[elem] = el[elem];
      foundElems.push(Obj);
    }
  });
});
console.log(foundElems);

Answer 2

我认为这就是您想要的：

if (ids.indexOf(data.id) !== -1){
  console.log('true')
}

Answer 3

对于数据中的每个项目，请检查ID是否在ID数组中，如果是，则执行某些操作

const ids = [
    "id1",
    "id2",
    "id3"
]

const data = [
  {
      id: "id3", // dynamically populated and can vary, we need this property
      prop2: "prop2", // not needed
      prop3: "prop3" // not needed
   }
]

// if we have the id in ids array, do something
if (data.some(d => ids.indexOf(d.id) > -1)) {
  // do something
}

使用lodash：

const ids = [
    "id1",
    "id2",
    "id3"
]

const data = [
  {
      id: "id3", // dynamically populated and can vary, we need this property
      prop2: "prop2", // not needed
      prop3: "prop3" // not needed
   }
]

// if we have the id in ids array, do something
if (_.some(data, d => ids.indexOf(d.id) > -1)) {
  // do something
}

Answer 4

只需运行下一个代码：

<html>
<body>
    <button onclick="compareIds()">Click me</button>
    <script>
        const ids = [
              "id1",
              "id2",
              "id3"
            ]

        const data = [
                {
                  id: "id3", // dynamically populated and can vary, we need this property
                  prop2: "prop2", // not needed
                  prop3: "prop3" // not needed
                }
            ]

        function compareIds(){
                var dataObject = findDataInObject();
                for(var i = 0; i < ids.length; i++){
                        if (ids[i] == dataObject){
                            console.log("true");
                        }

                        else{
                            if(i == ids.length -1){
                                console.log("false");
                            }
                    }
                }
        }

        function findDataInObject(){
                    for(key in data) {
                        if(data.hasOwnProperty(key)) {
                            var ArrayOfData = data[key];
                            var IdOfData = ArrayOfData.id;
                            return IdOfData;
                        }
                    }
                }


    </script>
</body>

在此示例中，如何比较数组值和对象属性？

4 个答案: