Question

Possible Duplicate:
Get all possible word combinations

I want to get a “power list” of a string. So given this input:

string[] s = new string[] { "a", "b", "c" } ;

The function would return:

string[] s = new string[] { "a", "b", "c", "ab", "ac", "bc", "abc" } ;

How can I do this ?

Answer 1

Try this:

string[] chars = new string[] { "a", "b", "c" };

List<string> result = new List<string>();
foreach (int i in Enumerable.Range(0, 4))
{
    IEnumerable<string> coll = chars;
    foreach (int j in Enumerable.Range(0, i))
    {
        coll = coll.SelectMany(s => chars, (c, r) => c + r);
    }
    result.AddRange(coll);
}