コレクション初期化子
■List(Of T)、Dictionary(Of T)の初期化子
List(Of T)やDictionary(Of T)等のコレクションについて、
宣言時にFromを付けることで初期化を行うことができる。
<<LIST>>
Dim list = as New List(Of Integer)From{10,20,30}
(*)受ける変数の型を指定するなら
Dim list as List(Of Integer) = as New List(Of Integer)From{10,20,30}
<<DICTIONARY>>
Dim Dict = as New Dictionary(Of Integer,String) From
{{100,"テスト1"},{200,"テスト2"}}
(*)受ける変数の型を指定するなら
Dim Dict as Dictionary(Of Integer,String)= as New Dictionary(Of Integer,String) From {{100,"テスト1"},{200,"テスト2"}}
■Classを初期化してコレクションに追加
(*)SampleClassというクラスがあったとして。(Hour,Minute,Secというメンバを持つ)
<<LIST>>
Dim list As List(Of SampleClass) = New List(Of SampleClass) _
From {
New SampleClass With {.Hour= 1, .Minute = 21, .Sec = 11},
New SampleClass With {.Hour= 10, .Minute = 32, .Sec = 14},
New SampleClass With {.Hour= 23, .Minute = 5, .Sec = 2},
Nothing
}
<<DICTIONARY>>
Dim dic As Dictionary(Of Integer, SampleClass) = New Dictionary(Of Integer, SampleClass)
From {
{1, New SampleClass With {.Hour= 1, .Minute = 21, .Sec = 11}},
{2, New SampleClass With {.Hour= 10, .Minute = 32, .Sec = 14}},
{3,New SampleClass With {.Hour= 23, .Minute = 5, .Sec = 2}},
{4, Nothing}
}