Store operation in a variable?

Greetings,

I have a function that contains a long switch statement. Depending on the string that is input into it, it will multiply a different variable by a value. I have a second function almost identical to the first, except it divides the variable by the value, in order to cancel out the first function (after a certain amount of time.)

Is there any way to combine the two, in order to prevent redundant code, such as storing an operation as a variable? I know this is dumb, but this is what I have in mind:

Code (CSharp):

1. void myFunction(string condition, float value, Operation op){
2.      switch(condition){
3.           case"Condition1":
4.               varOne op= value;
5.               break;
6.            case"Condition2":
7.               varTwo op= value;
8.               break;
9.     }
10. }

 

You're looking for delegates. A delegate is basically a reference to a function that can be passed around as a variable - it can be stored, passed as a parameter, etc.

You first need to define the delegate's signature, which looks like a regular function definition, but with the word "delegate" and no function body:

Code (csharp):

1. public delegate bool OperationDelegate(float x);

Then you can use OperationDelegate as the type of the variable (which is the function being pointed to):

Code (csharp):

1. void myFunction(float value, OperationDelegate operation) {
2. bool returnedValue = operation(value);
3. }

Now you have two ways of calling this. You can do it with a reference to a regular function:

Code (csharp):

1. public bool IsBig(float x) {
2. return x > 5f;
3.  
4. myFunction(2f, IsBig);

Or you can define it inline, which is called a "lambda function":

Code (csharp):

1. myFunction(2f, (x) => {
2. return x > 5f;
3. });

If needed, I could give more helpful examples if you could describe what your actual goal is here.

 

Thank you! My goal is equipping/unequipping the players armor and weapons. The function is intended to increase a value when equipped (ex +15% defense=

defense*=1.15

) and return it to its regular value when unequipped (ex -15% defense=

defense/=1.15

).
Essentially, I'd like to do this using the same function to avoid repetitive code.