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jsakamoto/sample1.fs

Created August 27, 2012 12:18
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これはコンパイルが通る(.NETのFileInfoクラスはnullになりうる)
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sample1.fs
open System.IO
open System.Linq
let dir = new DirectoryInfo("c:\\")
let fileOfFoo = dir.GetFiles().FirstOrDefault(fun f -> f.Name = "foo")
printfn "%s" (if fileOfFoo = null then "null!" else "exists!")
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