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Alex Rivera
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Why this is not working: List(true,false).filter(_).size The error says: <console>:8: error: missing parameter type for expanded function ((x$1) => List(true, false).filter(x$1).size) List(true,false).filter(_).size ^ but the following works (looks just the same for me): List(true,false).filter(a => a).size I'm using Scala 2.9.0.1.
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