How do get data based on the combinations of values in C#

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Hi

I need to get the values based on the combination of two values i do not want to use if else statment or switch case Please advice as i am very new to this.

The sample data format is mentioned below

Combinations                         result
   0  1                       -->      x
   0  2                       -->      y
   0  3                       -->      z
   1  0                       -->      a
   2  3                       -->      d

Thanks

What I have tried:

i have tried switch case and used else if and if condition these conditions are making code huge as i have a large number of combinations and code unreadble.

Posted 5-Sep-16 22:43pm

Member 11699415

Updated 6-Sep-16 1:34am

OriginalGriff

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Comments

Richard MacCutchan 6-Sep-16 4:47am

Your question is unclear; exactly how are you using these values and what decisions do you need to make?

njammy 6-Sep-16 4:55am

Where are these values stored? text file? database? constants?

3 solutions

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CPallini · Accepted Answer · 2016-09-05T22:54:00

Solution 1

To map the two integers into a character, you might use a Dictionary having a pair (a bidimensional Tuple) of integers as key.

Posted 5-Sep-16 22:54pm

CPallini

OriginalGriff · Accepted Answer · 2016-09-05T23:00:00

There are a couple of problems here: the major one being that we have no idea what the range of values in your "combinations" could be: so we have no idea what kind of solution to propose. In addition, we don't know exactly what the result is: are those variable names? Values? Strings? We have no idea.
But I suspect that you are trying to avoid nesting your switch statements as they make code difficult.
So one solution might be:

C#

int comb1 = 1;
int comb2 = 0;
long combination = ((long)comb1) << 32 | comb2;
switch (combination)
    {
    case 0L << 32 | 1: result = x; break;
    case 0L << 32 | 2: result = y; break;
    case 0L << 32 | 3: result = z; break;
    case 1L << 32 | 0: result = a; break;
    case 2L << 32 | 3: result = d; break;
    default:
        // ...
        break;
    }

Which removes the nesting and reduces the code to manageable proportions.

Patrice T · Accepted Answer · 2016-09-06T01:34:00

Solution 3

Quote:
i have for 4, total combinations
0,0 to 0,15
1,0 to 1,15
2,0 to 2,15
3,0 to 3,15
4,0 to 4,15

As OriginalGriff said the easiest is to make this a 2D array of constants.
After that, in code, it just a matter of reading the array.
Try something like:

C#

int Table[][]={{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,15},
               {16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31},
               ...};

and to read

C#

MyVar= Table[0,15];

Posted 6-Sep-16 1:34am

Patrice T

Comments

Philippe Mori 6-Sep-16 8:58am

Sometime it might make sense to do that but in a case like this it is much simpler to write a function that multiply one of the number by a power of 2 such that bits don't overlap like: x' = 16 * x1 + x2 where x1 would be the number between 0 and 4 inclusively and x2 the number between 0 and 15 inclusively.

Patrice T 6-Sep-16 9:53am

I do both, depending on the data meaning and usage.
But we don't have much information about it.