author | Christian Urban <christian dot urban at kcl dot ac dot uk> |
Thu, 21 Feb 2013 16:07:40 +0000 | |
changeset 193 | 317a2532c567 |
child 221 | 18905d086cbb |
permissions | -rw-r--r-- |
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Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
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package object lib { |
317a2532c567
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Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
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317a2532c567
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Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
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//some list functions |
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Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
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def tl[A](xs: List[A]) : List[A] = xs match { |
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Christian Urban <christian dot urban at kcl dot ac dot uk>
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case Nil => Nil |
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Christian Urban <christian dot urban at kcl dot ac dot uk>
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case x::xs => xs |
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Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
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} |
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Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
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Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
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def hd[A](xs: List[A]) : A = xs.head |
317a2532c567
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Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
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317a2532c567
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Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
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def nth_of[A](xs: List[A], n: Int) = |
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parents:
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if (n <= xs.length) Some(xs(n)) else None |
317a2532c567
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Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
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317a2532c567
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Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
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//some map functions |
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Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
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def dget(m: Map[Int, Int], n: Int) = m.getOrElse(n, 0) |
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Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
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Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
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//some string functions |
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Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
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def join[A](xs: List[A]) = xs.foldLeft("")(_.toString + _) |
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Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
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parents:
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} |