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djspiewak/broken-associativity.scala

Created February 16, 2018 00:50
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broken-associativity.scala
val second = Vector(1, 2, 3) flatMap { x =>
Set(4, 5, 6) flatMap { y =>
List(7, 8, 9)
}
}
// => Vector(7, 8, 9, 7, 8, 9, 7, 8, 9)
val third = Vector(1, 2, 3) flatMap { x =>
Set(4, 5, 6)
} flatMap { y =>
List(7, 8, 9)
}
// => Vector(7, 8, 9, 7, 8, 9, 7, 8, 9, 7, 8, 9, 7, 8, 9, 7, 8, 9, 7, 8, 9, 7, 8, 9, 7, 8, 9)
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