how many letters? help plz

the text "Hello dude" consists of 6 diffent letters... i got a text in written into a textbox , and i want to check how many diffrent letters there is.. how ? i saw someone use [a-z] thing, but i didnt quite get it... any sugestions ?

I'm not the best person to ask but no-oneelse seems to be answering your pleas.

I can offer two solutions neither of which are perfect.

The first is a solution that will only work if you know what characters are in the string, and that would be to just split the string by all of those characters:

string s = "whatever";
string[] spl = s.Split('w');
int amountOfThisCharacter = spl.length;

and so on with all your letters.

2nd is to write a time consuming switch:

foreach(char c in string s)
{
switch(c)
{
case 'a':
aCtr++;
break;

case 'b':
bCtr++;
break;
}
}
and so on......

Neither of these solutions are perfect, but they will work.

jax

I am not sure what language you are using, but try this in VB.NET:

Sub BlahBlah()

Dim i, pintCountUniqueLetters as integer 'just to keep count
Dim YourString as String

'At some point after you have set a value for YourString

YourString = YourString.ToUpper

For i = 65 to 90
&nbsp;&nbsp;&nbsp;If YourString.IndexOf(Chr(i) <> -1 Then
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;YourString.Replace(Chr(i),"")
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;pintCountUniqueLetters +=1
&nbsp;&nbsp;&nbsp;End If
Next

End Sub



This should work