你如何检查对象数组的 object 中是否存在值？

Question

我想知道我应该使用哪种逻辑来检查祖父 object 中包含的每个对象的父 object 数组

大家好，我想检查这个值是否存在，例如：“127.0.0.1”存在于这个 object 中（MyObject 中有 2k 个对象）

{
  "name" : MyObject
  "value": [
      {
        "name" : "Object1",
        "properties":{
          "address" : [
             "13.65.25.19/32",
             "13.66.60.119/32",
           ]
         }
      },
      {
        "name" : "Object2",
        "properties":{
          "address" : [
             "13.65.25.19/32",
             "127.0.0.1",
           ]
         }
      }
    ]
}

顺便说一句，include() 是否需要匹配整个字符串，或者例如，如果 127.0.0.1 在我的 object 127.0.0.1/32 中是这样的，即使有 ip 范围，我仍然可以检索它吗？

Answer 1

您的数据结构非常具体，因此您可以编写一个可以反复调用的自定义方法。 它将检查一个

 const obj = { name: 'MyObject', value: [ { name: 'Object1', properties: { address: ['13.65.25.19/32', '13.66.60.119/32'], }, }, { name: 'Object2', properties: { address: ['13.65.25.19/32', '127.0.0.1'], }, }, ], }; const address = '127.0.0.1'; const includesAddress = (address) => { for (const val of obj.value) { if (val.properties.address.some((a) => address === a)) return true; } return false; }; console.log(includesAddress(address));

Answer 2

Array.flatMap实现

 const obj = { name: 'MyObject', value: [ { name: 'Object1', properties: { address: ['13.65.25.19/32', '13.66.60.119/32'], }, }, { name: 'Object2', properties: { address: ['13.65.25.19/32', '127.0.0.1'], }, }, ], }; const address = '127.0.0.1'; const output = obj.value.flatMap(item => item.properties.address).includes(address); console.log(output);

如果你想检查部分 ip 地址是否包含在列表中，你应该使用正则表达式实现。

示例实施

 const obj = { name: 'MyObject', value: [ { name: 'Object1', properties: { address: ['13.65.25.19/32', '13.66.60.119/32'], }, }, { name: 'Object2', properties: { address: ['13.65.25.19/32', '127.0.0.1'], }, }, ], }; const address = '13.65.25.19'; const regex = new RegExp(address, 'i') const output = obj.value.flatMap(item => item.properties.address).filter(x => regex.test(x)).length > 0; console.log(output);