Question

Is it possible to insert a parameter in a function depending on a boolean value?

For example, I have this piece of code:

Math.min(boolA ? doubleValueA, boolB ? doubleValueB);

Thanks in advance!

Answer 1

Use a default value (such as Double.MAX_VALUE) if boolA or boolB is false:

Math.min(
    (boolA) ? doubleValueA : Double.MAX_VALUE,
    (boolB) ? doubleValueB : Double.MAX_VALUE
);

Edit

If you have a list of variables that you want to find the minimum, but only if the corresponding boolean variable is set, load the list into an array and find the minimum:

ArrayList<Double> myArray = new ArrayList<Double>();
if (boolA) myArray.add(doubleValueA);
if (boolB) myArray.add(doubleValueB);
// etc

double minValue = Double.MAX_VALUE; // start with largest possible value
// loop through and replace with any smaller values
for (double val : myArray)
    if (val < minValue) minValue = val;
// val now contains the smallest value

Edit 2

This can also be applied in general to other functions. Selectively add your parameters to an array, and pass the array to the function. If you have control over the function definition, you can use variable arguments to make it simpler.

public double MyMin(double... myArray) {
    double minValue = Double.MAX_VALUE; // start with largest possible value
    // loop through and replace with any smaller values
    for (double val : myArray)
        if (val < minValue) minValue = val;
    // val now contains the smallest value
    return val;
}