Enumerating all combinations of lists of different types
- by jball
Given two IEnumberables of different types, what is the best practice (considering readability and maintainability) for iterating over both lists to perform an action on all possible combinations?
My initial solution was to use nested foreach loops, iterating over the first IEnumerable, and then within that loop, iterating over the second IEnumerable and passing the value from the outer and the current loop into the target method. Eg.:
enum ParamOne
{
First,
Second,
Etc
}
List<int> paramTwo = new List<int>() { 1, 2, 3 };
void LoopExample()
{
foreach (ParamOne alpha in Enum.GetValues(typeof(ParamOne)))
{
foreach (int beta in paramTwo)
{
DoSomething(alpha, beta);
}
}
}
I tried to restructure it with LINQ, but ended up with something that had no obvious advantages and seemed less intuitive. A search here shows lots of questions about nesting foreachs to iterate over child properties, but I couldn't find anything about iterating over two distinct lists.
