c# - Unable to step-in to Recursive function breakpoint VS2013 -

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i trying convert method loops recursion part of coding kata practices(trying solve problems recursive approach). there's nothing in logic

  • the breakpoint not being hit anywhere in recursive method.
  • i tried place logger(console output) check if method called nothing being logged.

here's method definition(s):

    // original method loop     public ienumerable<tuple<int, int>> getelementwithlargestdeltaontimeline(int[] a)     {         int runninglindex = 0;         int currlvalue = a[0];         int runninghindex = 1;         int currhvalue = a[1];         int currdelta = 0;          (int = 1; < a.length - 1; i++)         {             if (a[i] < currlvalue)             {                 currlvalue = a[i];                 runninglindex = i;             }              (int j = runninglindex + 1; j < a.length; j++)             {                 if ((a[j] - currlvalue) > currdelta)                 {                     currdelta = a[j] - currlvalue;                     runninghindex = j;                     currhvalue = a[j];                 }             }         }          yield return new tuple<int, int>(currlvalue, runninglindex);         yield return new tuple<int, int>(currhvalue, runninghindex);      }

recursive - 

    // trying above method convert recursive,      // note - may not correct *shy* problem why it's not doing anything(not step through/logging)     public ienumerable<tuple<int, int>> getelementwithlargestdeltaontimelinerec         (int[] a, int i, int j, int runninglindex, int currlvalue, int runninghindex, int currhvalue, int currdelta)     {         console.writeline("iteration i-{0}: j-{1} runninglindex-{2} currlvalue-{3} runninghindex-{4} currhvalue-{5} currdelta-{6}"                                    , i, j, runninglindex, currlvalue, runninghindex, currhvalue, currdelta);         if (i < a.length)         {             if (a[i] < currlvalue)             {                 currlvalue = a[i];                 runninglindex = i;             }              if (j < a.length)             {                 if ((a[j] - currlvalue) > currdelta)                 {                     currdelta = a[j] - currlvalue;                     runninghindex = j;                     currhvalue = a[j];                 }                  getelementwithlargestdeltaontimelinerec(a, i, j++, runninglindex, currlvalue, runninghindex, currhvalue, currdelta);             }         }         else         {             yield return new tuple<int, int>(currlvalue, runninglindex);             yield return new tuple<int, int>(currhvalue, runninghindex);         }          getelementwithlargestdeltaontimelinerec(a, i++, runninglindex + 1, runninglindex, currlvalue, runninghindex, currhvalue, currdelta);         yield break;     }

main - 

public class program {     public static void main()     {         var = new[] { 10, 9, 3, 6, 7, 8, 15, 10, 6 };         var val = new stockmanager();         var result = val.getelementwithlargestdeltaontimelinerec(a, 0, 0, 0, a[0], 1, a[1], 0);     } }

question(s) -

  • does recursive method calls something(incorrect) causing issue?
  • why method not being called , returning empty result without failing/error/warning?

additional info - .net 4.5, visual studio 2013

i tried running code on different machine(just verify if wrong vs instance).

there little trick methods return ienumerable. should enumerate them!

instead of calling getelementwithlargestdeltaontimelinerec inside should enumerate , yield return elements or store result use later. ienumerables nothing until enumerated.

foreach (var e in getelementwithlargestdeltaontimelinerec(...))     yield return e;

or

var innerresult = getelementwithlargestdeltaontimelinerec(...);

and use innerresult somehow cause enumerated.


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