Dot product: Difference between revisions
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p [1, 3, -5].dot_product [4, -2, -1] # => 3</lang> |
p [1, 3, -5].dot_product [4, -2, -1] # => 3</lang> |
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=={{header|Scala}}== |
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{{works with|Scala|2.8}} |
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<lang scala>class Dot[T](v1: Seq[T])(implicit n: Numeric[T]) { |
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import n._ |
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def dot(v2: Seq[T]) = { |
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require(v1.length == v2.length) |
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v1 zip v2 map Function.tupled(_*_) sum |
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} |
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} |
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implicit def toDot[T : Numeric](v1: Seq[T]) = new Dot(v1) |
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val v1 = List(1, 3, -5) |
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val v2 = List(4, -2, -1) |
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println(v1 dot v2)</lang> |
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=={{header|Scheme}}== |
=={{header|Scheme}}== |
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