Thank you to R.E. Boss and Raul for your answers on pairs. I have another problem to resolve:
How can I know is a potential new symbol exist without creating it as a symbol ? Something like: 0 s: 0 123 SymbolExist '`some unexisting symbol' 0 0 s: 0 123 So now I know this symbol does not exist and it was not created. ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
