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by kasey_junk
4536 days ago
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Options are the most obvious: def foo(opt: Option[Bar]) = opt.map(_.toString).getOrElse("") This non-obviously creates an extra object in the Some case. As opposed to: if(opt.isDefined) opt.toString else "" which creates 0. Not a huge deal in this specific case (unless this is a hot call). But this sort of thing is endemic to all of the standard libraries. Edit -- only 1 extra object, but it is in both the Some & None case (which is sort of the point, it is hard to know with idiomatic Scala) |
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