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6.6

class extension confusion

Asked by Donelson in Adobe Flash

Tags: strreplace

Okay, I thought I new how to do this, but I guess not. Help!

I am trying to extend the String Class to add new functions. My first is a general purpose Find & Replace.

When I try to use it in my FLA, I get
"Type mismatch in assignment statement: found String where StringMaster is required."

This whole method seems weird to me. I'd just like to do this in the end...

var str:StringMaster = new StringMaster("");
str += "This is text.";
str += " And this is more.";
str = str.replace("is", "was");

The Class .as file "StringMaster.as" contains

============
class StringMaster extends String{
      private var s;
      public var _replaceStringsCount = 0;

      // Constructor
      public function StringMaster(target){
            super(target);
            s = target;
      }

// General purpose Find & Replace
      public function replace(strPattern, strReplace) {
            _replaceStringsCount = 0; // sometimes interesting
            var n:Number = strPattern.length;
            if (n == 0) {
                  return s; // No pattern, return original
                  }
            //
            var i:Number = 0;
            var strOut:String = new String;
            var k:Number = s.indexOf(strPattern); // find first occurence
            while (k >= 0) { // Keep replacing as long as pattern is found
                  _replaceStringsCount++; // may be of interest
                  strOut += s.substring(i, k); // this section up to pat
                  strOut += strReplace; // insert replacement
                  i = k + n; // skip past pattern
                  k = s.indexOf(strPattern, i); // find next occurence, if any
            }

            strOut += s.substr(i,s.length); // append final chars
            return strOut;
      }

} // END of Class extension
===============

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20091111-EE-VQP-89

class extension confusion

Asked by Donelson in Adobe Flash

Tags: strreplace

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