C#

public IEnumerable<string> Tokenize(string input, char seperator)
     {
         int lastSeperatorIndex = 0;
         int openSingleQuoteCount = 0;
         int openParenthesisCount = 0;

         for (int i = 0; i < input.Length; i++)
         {
             char character = input[i];
             if (character == '(')
             {
                 openParenthesisCount++;
             }
             else if (character == ')' && openParenthesisCount > 0)
             {
                 openParenthesisCount--;
             }
             else if (character == '\'')
             {
                 openSingleQuoteCount = (openSingleQuoteCount == 0) ? openSingleQuoteCount + 1 : openSingleQuoteCount - 1;
             }
             else if (character == seperator && openParenthesisCount == 0 && openSingleQuoteCount == 0)
             {
                 yield return input.Substring(lastSeperatorIndex, i - lastSeperatorIndex + 1).Trim(seperator);
                 lastSeperatorIndex = i;
             }

             // If we're at the end and we've got some characters since our last yield,
             // yield the rest of the string.
             if (i == input.Length - 1 && i != lastSeperatorIndex)
             {
                 yield return input.Substring(lastSeperatorIndex, i - lastSeperatorIndex + 1).Trim(seperator);
             }
         }
     }

Judah Himango wrote:

I bet LINQ would let us write a little query on the string to accomplish the same thing, only in about 3 or 4 lines of code.

peterchen wrote:

If only we knew how these lines have to look!

peterchen wrote:

P.S. I'm always amazed how far you go out of your way to help. I don't kow how to say "thank you".

<br />
public YourInterfaceOrClassType GetClassInstance(string classNameString)<br />
{<br />
    //  Get the actual Type object for the given type.<br />
    System.Type classType = System.Type.GetType(classNameString);<br />
<br />
    //  Throw an exception if the type could not be found.<br />
    if(classType == null)<br />
        throw new TypeLoadException(String.Format("Type {0} does not exist.", classNameString));<br />
<br />
    //  Make sure that the type implements the desired interface.<br />
    Type interfaceType = classType.GetInterface(yourInterfaceNameString, true);<br />
    if(interfaceType == null || !interfaceType.Equals(typeof(YourInterfaceType)))<br />
        throw new TypeLoadException(String.Format("Type {0} does not implement the {1} interface.", classNameString, yourInterfaceNameString));<br />
<br />
    //  Make sure that the type is not an abstract class that cannot be instantiated.<br />
    if(classType.IsAbstract)<br />
        throw new TypeLoadException(String.Format("Type {0} is abstract and cannot be instantiated.", classNameString);<br />
<br />
    //  Create an instance of the type.<br />
    return (YourInterfaceOrClassType)Activator.CreateInstance(classType);<br />
}<br />

peterchen wrote:

Is there an IList implementaiton that fires a change notification when the list is moified (items added, removed, list cleared)?

CPallini wrote:

Perhaps he wants to dynamically create an instance of a class whose type is given by the "frmMainPage" string. Do you agree?