How do I compare IOrderedEnumerable<char> in C#?
Hi,
I have the following code to check if two string are the same after they are re-ordered.
I want to use LINQ and this is what I did.
when I print s1 and s2 using foreach...they are both "eilnst". But it returns "false".
How can I correct this?
I have the following code to check if two string are the same after they are re-ordered.
I want to use LINQ and this is what I did.
when I print s1 and s2 using foreach...they are both "eilnst". But it returns "false".
How can I correct this?
static void Main(string[] args)
{
string str1 = "Silent";
string str2 = "Listen";
Console.WriteLine(areEqual(str1, str2));
Console.Read();
}
public static bool areEqual(string str1, string str2)
{
var s1 = str1.ToLower().OrderBy(x => x);
var s2 = str1.ToLower().OrderBy(x => x);
foreach (var item in s1)
{
Console.Write(item);
}
Console.WriteLine();
foreach (var item in s2)
{
Console.Write(item);
}
Console.WriteLine();
return str1.ToLower().OrderBy(x => x)==(str1.ToLower().ToList().OrderBy(x => x));
}
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You are comparing two IEnumerable instances by reference. These would never be equal unless they are the exact same reference. You could try using the SequenceEqual method:
return Enumerable.SequenceEqual(str1.ToLower().OrderBy(x => x), str1.ToLower().OrderBy(x => x));
Alternatively, you could convert your IEnumerable<char> to a string and compare the results:
var s1 = string.Concat(str1.ToLower().OrderBy(x => x).TakeWhile(char.IsLetter));
var s2 = string.Concat(str2.ToLower().OrderBy(x => x).TakeWhile(char.IsLetter));
return s1 == s2;
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