Question

Say I have a function c[i] = f(x[i], y[i]). I have the input value arrays x and y of equal length and I want to calculate the values of array c in the end. How do I get that using LINQ?

i.e. without having to write:

c = new double[x.Length];

for (int i = 0; i < x.Length; i++)
{
   c[i] = f(x[i], y[i]);
}

Answer 1

Use Zip method, e.g.:

int[] x = { 1, 2, 3 };
int[] y = { 4, 5, 6 };

var result = x.Zip(y, (i, j) => i + j);

or if you have already method with adequate params, simply use:

var result = x.Zip(y, Function);
// in this sample Function looks like:
static int Function(int x, int y)
{
    return x + y;
}