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I rewrote my original code which used bitmasking and shifts because I thought it was too "magical", i.e., difficult to understand at first glance. The problems have different levels of difficulty. Here's another implementation in Scala that generates permutations in a different way: def permutationsTwo[A](input: Set[A]): Set[List[A]] = { // we use an inner function called "loop" so that we can hide the fact that // we're converting the input set into a list. GitHub Gist: instantly share code, notes, and snippets. > > Here is my scala representation of the problem described so far: > More Permutations in Scala. */ val xsize = l.size /** * Generates the combinations of this list with given length 'n'. The difference between combinations and permutations is ordering. We all know that there are C(12,3) = 220 possibilities (C(N,K) denotes the well-known binomial coefficient). I need to make > combinations of currencies and credit card types out of strings. Translation of: Scala. scala combinatorics permutations group-theory permutation-groups permutation-algorithms group-theory-algorithms Updated Mar 19, ... A calculation npm module that is to simplify the calculation of permutations and combinations. 組み合わせは combinations メソッドで求められます． scala> a.combinations :9: error: missing arguments for method combinations in trait SeqLike; follow this method with `_' if you want to treat it as a partially applied function a.combinations 引数無しで呼ぶとエラーになってしまいました． Generate Permutations of String in Scala. I have since generalized it for combinations of variables with only 2 values, and added a dash of general Scala-isms. * Permutations 26/10/2015 PERMUTE CSECT USING PERMUTE,R15 set base register LA R9,TMP-A n=hbound(a) SR R10,R10 nn=0 > Subject: [scala-user] Making combinations > > > I think I have a relatively common programming problem. Permutations with repetitions is a draft programming task. ... and pass the intermediate result to a deciding routine for combinations selection and/or early generator termination. I () have altered them to be more amenable to programming in Scala.Feedback is appreciated, particularly on anything marked TODO.. This has been unit-tested with ScalaTest, and has proper documentation. An example of a combination is in the cards you are dealt in a poker-hand, out of the possible 52 cards you are drawn 5 (52 choose 5). With permutations we care about the order of the elements, whereas with combinations … javascript npm-module permutations combinations calculation Updated Nov 21, 2020; These are an adaptation of the Ninety-Nine Prolog Problems written by Werner Hett at the Berne University of Applied Sciences in Berne, Switzerland. P26 (**) Generate the combinations of K distinct objects chosen from the N elements of a list. 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