Mega Code Archive
0472 GroupBy - Comparer, Mapped
<![CDATA[
public void Linq45()
{
string[] anagrams = { "from ", " salt", " earn ", " last ", " near ", " form " };
var orderGroups = anagrams.GroupBy(
w => w.Trim(),
a => a.ToUpper(),
new AnagramEqualityComparer()
);
ObjectDumper.Write(orderGroups, 1);
}
public class AnagramEqualityComparer : IEqualityComparer<string>
{
public bool Equals(string x, string y)
{
return getCanonicalString(x) == getCanonicalString(y);
}
public int GetHashCode(string obj)
{
return getCanonicalString(obj).GetHashCode();
}
private string getCanonicalString(string word)
{
char[] wordChars = word.ToCharArray();
Array.Sort<char>(wordChars);
return new string(wordChars);
}
}
Result
...
FROM
FORM
...
SALT
LAST
...
EARN
NEAR
]]>