Thanks to @huitseeker for the answer, but the fact that `for ((_,_)<-List(1->2))()` needs a filter still seems crazy: http://stackoverflow.com/a/17427067/334519 …
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@d6@huitseeker@travisbrown should the takeaway be avoid for-comprehensions, avoid tuples, or avoid matching on parameterized types?
@eed3si9n @d6 @huitseeker @travisbrown avoid for-comprehensions almost always. Another thing #scala continues to get wrong.
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@dibblego@d6@huitseeker@travisbrown because the semantics is not clear? didn't know `for` was so controversial -
@eed3si9n@d6@huitseeker@travisbrown#scala for-comprehensions get a lot of little things wrong that usually sum up to give you a bad day
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@dibblego@eed3si9n@d6@huitseeker@travisbrown I'm tempted to see if I can write a macro to make them scalaz Monad bound. -
@seanparsons@eed3si9n@d6@huitseeker@travisbrown if you do, fix all the bits.
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