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no iterations

Scheduled Pinned Locked Moved Clever Code
questionphpcombeta-testing
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  • L Luc Pattyn

    hmm. Not quite, Binet's formula would give better performance than any loop or recursion once n goes up. And please don't think of doing these things recursively (unless you cache intermediate results), it would take very long as it has exponential behavior. :)

    Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles] Nil Volentibus Arduum

    Please use < PRE > tags for code snippets, it preserves indentation, and improves readability.

    A Offline
    A Offline
    Andrew Rissing
    wrote on last edited by
    #11

    NetQuestions wrote:

    I want to initialize a string array with "*".

    That part and the subsequent responses regarding that from you and Ennis just confused me over what he actually wants. </spam>

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    • L Luc Pattyn

      Can you come up with an appropriate name for this method:

      public static string[] xyz(int n) {
      if (n<1) throw new ArgumentException("n must be greater than zero");
      return new string('*', (int)Math.Round((Math.Pow(0.5+Math.Sqrt(1.25), n)-Math.Pow(0.5-Math.Sqrt(1.25), n))/Math.Sqrt(5))).Replace("*", ".*").Substring(1).Split('.');
      }

      PS: triggered by an actual programming question (which looked like homework). :)

      Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles] Nil Volentibus Arduum

      Please use < PRE > tags for code snippets, it preserves indentation, and improves readability.

      P Offline
      P Offline
      PIEBALDconsult
      wrote on last edited by
      #12

      MyGodItsFullOfStars

      L A 2 Replies Last reply
      0
      • P PIEBALDconsult

        MyGodItsFullOfStars

        L Offline
        L Offline
        Luc Pattyn
        wrote on last edited by
        #13

        BestSoFar :)

        Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles] Nil Volentibus Arduum

        Please use < PRE > tags for code snippets, it preserves indentation, and improves readability.

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        • L Luc Pattyn

          Sorry, rejected by at least a dozen FxCop rules. :)

          Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles] Nil Volentibus Arduum

          Please use < PRE > tags for code snippets, it preserves indentation, and improves readability.

          A Offline
          A Offline
          Abhinav S
          wrote on last edited by
          #14

          Luc Pattyn wrote:

          Sorry, rejected by at least a dozen FxCop rules.

          GAH - you did not tell me you had FXCop running. :)

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          • P PIEBALDconsult

            MyGodItsFullOfStars

            A Offline
            A Offline
            Andrew Rissing
            wrote on last edited by
            #15

            :laugh: Got my vote.

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            • L Luc Pattyn

              Can you come up with an appropriate name for this method:

              public static string[] xyz(int n) {
              if (n<1) throw new ArgumentException("n must be greater than zero");
              return new string('*', (int)Math.Round((Math.Pow(0.5+Math.Sqrt(1.25), n)-Math.Pow(0.5-Math.Sqrt(1.25), n))/Math.Sqrt(5))).Replace("*", ".*").Substring(1).Split('.');
              }

              PS: triggered by an actual programming question (which looked like homework). :)

              Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles] Nil Volentibus Arduum

              Please use < PRE > tags for code snippets, it preserves indentation, and improves readability.

              R Offline
              R Offline
              ricmil42
              wrote on last edited by
              #16

              FibonacciStrings ( )

              A 1 Reply Last reply
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              • L Luc Pattyn

                Can you come up with an appropriate name for this method:

                public static string[] xyz(int n) {
                if (n<1) throw new ArgumentException("n must be greater than zero");
                return new string('*', (int)Math.Round((Math.Pow(0.5+Math.Sqrt(1.25), n)-Math.Pow(0.5-Math.Sqrt(1.25), n))/Math.Sqrt(5))).Replace("*", ".*").Substring(1).Split('.');
                }

                PS: triggered by an actual programming question (which looked like homework). :)

                Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles] Nil Volentibus Arduum

                Please use < PRE > tags for code snippets, it preserves indentation, and improves readability.

                D Offline
                D Offline
                dawmail333
                wrote on last edited by
                #17

                HereBeDragons(n) ;P Or even better: uβerπ(n) :laugh: EDIT: If you can't read that, it says uBer(pi)

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                • R ricmil42

                  FibonacciStrings ( )

                  A Offline
                  A Offline
                  Abhinav S
                  wrote on last edited by
                  #18

                  ricmil42 wrote:

                  FibonacciStrings ( )

                  That sounds like an actual answer - no fun. ;P

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                  • L Luc Pattyn

                    Can you come up with an appropriate name for this method:

                    public static string[] xyz(int n) {
                    if (n<1) throw new ArgumentException("n must be greater than zero");
                    return new string('*', (int)Math.Round((Math.Pow(0.5+Math.Sqrt(1.25), n)-Math.Pow(0.5-Math.Sqrt(1.25), n))/Math.Sqrt(5))).Replace("*", ".*").Substring(1).Split('.');
                    }

                    PS: triggered by an actual programming question (which looked like homework). :)

                    Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles] Nil Volentibus Arduum

                    Please use < PRE > tags for code snippets, it preserves indentation, and improves readability.

                    H Offline
                    H Offline
                    Hired Mind
                    wrote on last edited by
                    #19

                    How about:

                        private static readonly double WhatDoesThisMean = 0.5 + Math.Sqrt(5);
                        private static readonly double WhatDoesThisMean2 = 0.5 - Math.Sqrt(1.25);
                    
                        public static string\[\] **DesparatelyNeedsRefactoring**(int n)
                        {
                            if (n < 1) 
                                throw new ArgumentException("n must be greater than zero");
                    
                            double d = Math.Pow(WhatDoesThisMean, n) - Math.Pow(WhatDoesThisMean2, n);
                    
                            var stringLength = (int) Math.Round(d / WhatDoesThisMean);
                            return new string('\*', stringLength).Replace("\*", ".\*").Substring(1).Split('.');
                        }
                    

                    Note that I would refactor the variable 'stringLength' out as well - I put that in there to try and figure out what was going on, before I gave up and Googled.

                    Before .NET 4.0, object Universe = NULL;

                    L 1 Reply Last reply
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                    • H Hired Mind

                      How about:

                          private static readonly double WhatDoesThisMean = 0.5 + Math.Sqrt(5);
                          private static readonly double WhatDoesThisMean2 = 0.5 - Math.Sqrt(1.25);
                      
                          public static string\[\] **DesparatelyNeedsRefactoring**(int n)
                          {
                              if (n < 1) 
                                  throw new ArgumentException("n must be greater than zero");
                      
                              double d = Math.Pow(WhatDoesThisMean, n) - Math.Pow(WhatDoesThisMean2, n);
                      
                              var stringLength = (int) Math.Round(d / WhatDoesThisMean);
                              return new string('\*', stringLength).Replace("\*", ".\*").Substring(1).Split('.');
                          }
                      

                      Note that I would refactor the variable 'stringLength' out as well - I put that in there to try and figure out what was going on, before I gave up and Googled.

                      Before .NET 4.0, object Universe = NULL;

                      L Offline
                      L Offline
                      Luc Pattyn
                      wrote on last edited by
                      #20

                      Hired Mind wrote:

                      I gave up and Googled

                      and? :)

                      Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles] Nil Volentibus Arduum

                      Please use <PRE> tags for code snippets, they preserve indentation, and improve readability.

                      H 1 Reply Last reply
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                      • L Luc Pattyn

                        Hired Mind wrote:

                        I gave up and Googled

                        and? :)

                        Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles] Nil Volentibus Arduum

                        Please use <PRE> tags for code snippets, they preserve indentation, and improve readability.

                        H Offline
                        H Offline
                        Hired Mind
                        wrote on last edited by
                        #21

                        Got distracted by productive work, and then you gave a the answer in another post. Fibonacci sequence right?

                        Before .NET 4.0, object Universe = NULL;

                        H 1 Reply Last reply
                        0
                        • H Hired Mind

                          Got distracted by productive work, and then you gave a the answer in another post. Fibonacci sequence right?

                          Before .NET 4.0, object Universe = NULL;

                          H Offline
                          H Offline
                          Hal Angseesing
                          wrote on last edited by
                          #22

                          I must say I was rather pleased with myself at having worked out the correct answer before reading this post (and another) with the correct answer in. Of course if anybody actually implemented this in production code they would be told off. Reminds me of the pointer trickery fun we used to do in C "for performance reasons" :)

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