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今回は短編。なぜこれが機能しないのですか?
Function identity($x){$x} @(1,2,3)[identity(1)]
(これらは動作します)
identity(1) @(1,2,3)[1]
identity(1)括弧を付けて最初に実行する必要があります。
identity(1)
@(1,2,3)[(identity(1))]