在重载方法时返回不同类型的做法不好吗? [英] Is a bad practice to Return different types when overloading a method?

问题描述

给出以下示例:

Interface CustomersDao
    Function Get(ByVal Id As Integer) As Customer
    Function Get(ByVal Filter As Filter) As IList(Of Customer)
End Interface

Public Sub Main()
    Dim Customer As Customer = CustomersDao.Get(4)

    Dim Filter As New CustomersDao.Filter
    Filter.Category = 2
    Dim Customers As IList(Of Customer) = CustomersDao.Get(Filter)
End Sub

以相同的方法返回不同类型是否是错误的做法?

Is it a bad practice to return diferent types in the same method?

推荐答案

我建议调用第二个 GetAll .

现在，第二种方法返回一个集合并不明显.
您应该努力确保您的课程尽可能的明显，并且不包含任何意外的惊喜.

Right now, it isn't obvious that the second method returns a collection.
You should strive to ensure that your classes are as obvious as possible and do not contain any unexpected surprises.

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