Created
April 22, 2015 20:28
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Perform a sequence of optional tasks in Elm
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| optional : List (Task error value) -> Task error (List value) | |
| optional list = case list of | |
| [] -> succeed [] | |
| task :: tasks -> task | |
| `andThen` (\value -> Task.map ((::) value) (optional tasks)) | |
| `onError` (\_ -> optional tasks) |
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