Created
September 25, 2012 06:03
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Enumerable.OfType in F#
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let ofType<'a> (source : System.Collections.IEnumerable) : seq<'a> = | |
let resultType = typeof<'a> | |
seq { | |
for item in source do | |
match item with | |
| null -> () | |
| _ -> | |
if resultType.IsAssignableFrom (item.GetType ()) | |
then | |
yield (downcast item) | |
} |
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