这是一个如何实现的示例Dictionary(Of String, String)
查找该同义词是否已知:
Shared GenderSynonyms As Dictionary(Of String, String) = New Dictionary(Of String, String) From
{{"boy", "M"}, {"boys", "M"}, {"male", "M"}, {"man", "M"}, {"m", "M"}, {"men", "M"}, {"guy", "M"},
{"girl", "F"}, {"girls", "F"}, {"female", "F"}, {"woman", "F"}, {"f", "F"}, {"women", "F"}, {"chick", "F"}}
Public Function AutoGender(ByVal dt As DataTable) As DataTable
If dt.Columns.Contains("Gender") Then
For Each row As DataRow In dt.Rows
Dim oldGender = row.Field(Of String)("Gender").ToLower
Dim newGender As String = String.Empty
If GenderSynonyms.TryGetValue(oldGender, newGender) Then
row.SetField("Gender", newGender)
End If
Next
End If
Return dt
End Function
请注意,我已经使用了集合初始值设定项 http://msdn.microsoft.com/en-us/library/dd293617.aspx来填补字典 http://msdn.microsoft.com/en-us/library/xfhwa508.aspx这是使用文字初始化集合的便捷方法。您还可以使用Add method http://msdn.microsoft.com/en-us/library/k7z0zy8k.
Edit:另一种可能更简洁的方法是使用两个HashSet(Of String) http://msdn.microsoft.com/en-us/library/bb359438.aspx,一个用于男性同义词,一个用于女性同义词:
Shared maleSynonyms As New HashSet(Of String) From
{"boy", "boys", "male", "man", "m", "men", "guy"}
Shared femaleSynonyms As New HashSet(Of String) From
{"girl", "girls", "female", "woman", "f", "women", "chick"}
Public Function AutoGender(ByVal dt As DataTable) As DataTable
If dt.Columns.Contains("Gender") Then
For Each row As DataRow In dt.Rows
Dim oldGender = row.Field(Of String)("Gender").ToLower
Dim newGender As String = String.Empty
If maleSynonyms.Contains(oldGender) Then
row.SetField("Gender", "M")
ElseIf femaleSynonyms.Contains(oldGender) Then
row.SetField("Gender", "F")
End If
Next
End If
Return dt
End Function
A HashSet
也必须是唯一的,因此它不能包含重复的Strings
(就像里面的钥匙一样Dictionary
),但它不是一个键值对,而只是一个集合。