javascript - js中的对象数组: remove duplicates

Question

我有一个包含多个对象的数组:

[{"firstName":"an","lastName":"something","linkedInID":"..."},{"firstName":"stefanie","lastName":"doe","linkedInID":"..."},{"firstName":"john","lastName":"something","linkedInID":null},{"firstName":"timmy","lastName":"test","linkedInID":null},{"firstName":"john","lastName":"something","linkedInID":null}, ... ]

可能存在重复项，我希望删除它们。

This答案让我明白了，我可以根据姓氏删除重复项:

var arr = {};

for ( var i=0, len=attendees_in_one_array.length; i < len; i++ )
    arr[attendees_in_one_array[i]['lastName']] = attendees_in_one_array[i];

attendees_in_one_array = new Array();
for ( var key in arr )
    attendees_in_one_array.push(arr[key]);

我只想在名字、姓氏和 linkedInID 完全相同时删除一个人。

我尝试将 arr[attendees_in_one_array[i]['lastName']] = attendees_in_one_array[i]; 更改为 arr[attendees_in_one_array[i]['lastName'] && attendees_in_one_array [i]['f​​irstName'] && attendees_in_one_array[i]['linkedInID']] = attendees_in_one_array[i]; 但这不起作用。

谁能帮我解决这个问题？

Answer 1

您可以通过 3 个值的组合形成唯一键

firstName + lastName + linkedInID

像这样:

var arr = [{"firstName":"an","lastName":"something","linkedInID":"..."},{"firstName":"stefanie","lastName":"doe","linkedInID":"..."},{"firstName":"john","lastName":"something","linkedInID":null},{"firstName":"timmy","lastName":"test","linkedInID":null},{"firstName":"john","lastName":"something","linkedInID":null} ]

var ulist = {}, uarr =[];
arr.forEach(function(k) { ulist[k.firstName + k.lastName + k.linkedInID] = k; });
for(var i in ulist) uarr.push(ulist[i]);

// uarr contains your desired result