Angular 4 从数组对象中删除重复项

Question

我的 Angular 4 应用程序中有一个 json 数组对象，我需要在我的 JSON 数组中找出唯一的空间类型。

JSON 数组：

[{"label":{"Space_Type":"Office_PrivateOffice"}},{"label":{"Space_Type":"Office_PrivateOffice"}},{"label":{"Space_Type":"Office_PrivateOffice"}},{"label":{"Space_Type":"Hospital_Lab"}},
{"label":{"Space_Type":"Office_OpenOffice"}},
{"label":{"Space_Type":"Office_PrivateOffice"}},
{"label":{"Space_Type":"Office_PrivateOffice"}},{},
{"label":{"Space_Type":"Office_PrivateOffice"}},
{"label":{"Space_Type":"Office_PrivateOffice"}},{"label":{"Space_Type":"Office_PrivateOffice"}},{"label":{"Space_Type":"Hospital_Lab"}},{"label":{"Space_Type":"Office_OpenOffice"}},{"label":{"Space_Type":"Office_PrivateOffice"}},{"label":{"Space_Type":"Office_OpenOffice"}},{}]

我想删除所有重复的空间类型。谁能告诉我如何获得。我想要结果：

[{Idx:0,Label:"Office_PrivateOffice"},{Idx:1,Label:"Office_OpenOffice"}]

Answer 1

您可以使用 lodash 方法 _.uniqWith

var jsonarray =  [{"label":{"Space_Type":"Office_PrivateOffice"}},{"label":{"Space_Type":"Office_PrivateOffice"}},{"label":{"Space_Type":"Office_PrivateOffice"}},{"label":{"Space_Type":"Hospital_Lab"}},
{"label":{"Space_Type":"Office_OpenOffice"}},
{"label":{"Space_Type":"Office_PrivateOffice"}},
{"label":{"Space_Type":"Office_PrivateOffice"}},{},
{"label":{"Space_Type":"Office_PrivateOffice"}},
{"label":{"Space_Type":"Office_PrivateOffice"}},{"label":{"Space_Type":"Office_PrivateOffice"}},{"label":{"Space_Type":"Hospital_Lab"}},{"label":{"Space_Type":"Office_OpenOffice"}},{"label":{"Space_Type":"Office_PrivateOffice"}},{"label":{"Space_Type":"Office_OpenOffice"}},{}];


var filtered =  _.uniqWith(jsonarray, _.isEqual);

console.log(filtered);

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