Question

如何检查变量是否与对象数组中的键匹配，然后将键的值保存到变量中？

我有点知道该怎么办，但不确定如何写：/

const securityGroupUsers = [
  {SiteSupport: "aedd8266-4015-42ea-bc1e-1325b7ee111f"},
  {ServiceDesk: "b750295b-2c02-4c6b-b5cc-019b06f01650"},
  {ServiceSupportTeam: "59f8e8ea-36d3-4e8c-aeee-c93823c94fb7"}
]

const variableForChecking = 'ServiceDesk';

// let valueNeeded = "b750295b-2c02-4c6b-b5cc-019b06f01650"

// TODO: Loop through securityGroupUsers to see if valueForChecking matches the key of any of the objects inside the array. If it does, then save the key value into a variable.

谢谢！

Answer 1

最简单的方法是使用Array.prototype.find()查找具有必需键的项目，而不是访问匹配项的必要属性：

const securityGroupUsers = [
        {SiteSupport: "aedd8266-4015-42ea-bc1e-1325b7ee111f"},
        {ServiceDesk: "b750295b-2c02-4c6b-b5cc-019b06f01650"},
        {ServiceSupportTeam: "59f8e8ea-36d3-4e8c-aeee-c93823c94fb7"}
      ],
      findItemValueByKey = (obj,keyName) => obj.find(item => keyName in item)[keyName]

console.log(findItemValueByKey(securityGroupUsers,'ServiceDesk'))

查找对象数组以查找具有必需键的对象并返回其值

1 个答案: