I tried to do this a while back and got it working for the most part (though I can't seem to find the code right now). I tracked down a JavaScript implementation of an expression evaluator that handled variables and functions (along with all the standard operators) and ported it to AS3. It took four or five hours, but was pretty straight forward due to JavaScript's and AS3's common heritage.
I can't remember which source I was using, but I specifically tracked down one that had a liberal usage license (it was for a commercial product). All I remember is that the comments and/or documentation was written by a non-native english speaker, so they were a bit hard to follow (and possibly not in english) in several places. Bottom line: google for "javascript expression evaluator" and start porting! Troy. On Jan 25, 2008 3:37 PM, Paul Decoursey <[EMAIL PROTECTED]> wrote: > I have not seen one, it sounds like a very useful thing. I'd imagine > it would be a fairly big undertaking depending on how far you want to > take it. > > I have not really looked at this too much, but this might be a > potential starting point, http://www.solve-et-coagula.com/?p=9 > looks like this guy has written a LISP interpreter in AS3. > > On Jan 25, 2008, at 1:46 PM, pfkellogg wrote: > > > does anyone know of an excel like evaluator for TextInput controls? I > > wrote a basic one that looks for the opening equals sign and handles * > > / - + operators but i am looking for a more sophisticated one. If you > > know of one please let me know. thanks again. patrick kellogg > > > > > > > > -- > > Flexcoders Mailing List > > FAQ: http://groups.yahoo.com/group/flexcoders/files/flexcodersFAQ.txt > > Search Archives: > http://www.mail-archive.com/flexcoders%40yahoogroups.com > > Yahoo! Groups Links > > > > > > > > >
