CODEWITHSUNDEEP
c#
Aviran Katz
Aviran Katz

Reputation: 761

Is there a way to simply resemble a truth table?

Is there any simple way to resemble a truth table in code? It has 2 inputs and 4 outcomes, as shown below:

enter image description here

My current code is:

private void myMethod(bool param1, bool param2)
{
    Func<int, int, bool> myFunc;
    if (param1)
    {
        if (param2)
            myFunc = (x, y) => x >= y;
        else
            myFunc = (x, y) => x <= y;
    }
    else
    {
        if (param2)
            myFunc = (x, y) => x < y;
        else
            myFunc = (x, y) => x > y;
    }
    //do more stuff
}

Upvotes: 5

Views: 589

Answers (3)

Dmitrii Bychenko
Dmitrii Bychenko

Reputation: 186748

I suggest using an array, i.e.

  // XOR truth table
  bool[][] truthTable = new bool[][] {
    new bool[] {false, true},
    new bool[] {true, false},
  };

...

  private void myMethod(bool param1, bool param2, bool[][] table) {
    return table[param1 ? 0 : 1][param2 ? 0 : 1];
  }

Upvotes: 5

Ren&#233; Vogt
Ren&#233; Vogt

Reputation: 43896

To simplify your code you could use param1 and param2 as bits of a value indexing in a predefined array:

private void myMethod(bool param1, bool param2)
{
    Func<int, int, bool>[] myFuncs = {
        (x, y) => x > y,
        (x, y) => x < y,
        (x, y) => x <= y,
        (x, y) => x >= y
    };

    int index = (param1 ? 2 : 0) + (param2 ? 1 : 0);
    Func<int, int, bool> myFunc = myFuncs[index];
    //do more stuff
}

But of course simplicity and readability is in the eye of the reader.

If both paramX are false, index will be 0. If both are true, index will be 3 etc...

Upvotes: 0

Shannon Holsinger
Shannon Holsinger

Reputation: 2341

public int myTest(bool a, bool b)
{
  if(!b)
    return 3;
  return a ? 1 : 2;
}

Upvotes: 0

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