Comparing two string arrays in C#

Question

Say we have 5 string arrays as such:

string[] a = {\"The\",\"Big\", \"Ant\"};
string[] b = {\"Big\",\"Ant\",\"Ran\"};
string[] c = {\"The\",\"Big\",\"Ant\"};         


        

Answer 1

If you want to compare them all in one go:

string[] a = { "The", "Big", "Ant" };
string[] b = { "Big", "Ant", "Ran" };
string[] c = { "The", "Big", "Ant" };
string[] d = { "No", "Ants", "Here" };
string[] e = { "The", "Big", "Ant", "Ran", "Too", "Far" };

// Add the strings to an IEnumerable (just used List here)
var strings = new List { a, b, c, d, e };

// Find all string arrays which match the sequence in a list of string arrays
// that doesn't contain the original string array (by ref)
var eq = strings.Where(toCheck => 
                            strings.Where(x => x != toCheck)
                            .Any(y => y.SequenceEqual(toCheck))
                      );

Returns both matches (you could probably expand this to exclude items which already matched I suppose)