From: dxforth@gmail.com   
      
   On 13/10/2024 1:20 pm, Ruvim wrote:   
   > On 2024-10-13 05:13, dxf wrote:   
   >> On 13/10/2024 12:54 am, Ruvim wrote:   
   >>> On 2024-10-12 05:45, dxf wrote:   
   >>>> The basics:   
   >>>>   
   >>>> : .BAD ( -- )  cr ." Invalid item"  .abort ;   
   >>>>   
   >>>> : ZE? ( x -- )  if .bad then ;     \ abort if non-zero   
   >>>> : NZ? ( x -- )  0= ze? ;           \ abort if zero   
   >>>   
   >>> Typically, if word name ends with a question mark, the first (top) output   
   parameter of the word is a *flag*. And it's true for all standard words.   
   (though, opposite is not true)   
   >>   
   >> It's rather similar.   
   >>   
   >> ZE? NZ?  destructively tests TOS   
   >   
   > But these words do not return a flag in the first output parameter. So,   
   their names violate the common convention.   
      
   Conventions are a guide.  Thankfully they're not yet a law.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)