rebol2

Here my function that execute cmd as a Rebol instructions : exec-cmd: func [ cmd [ block! ] "Rebol instructions" /local err ] [ if error? err: try [ do cmd ] [ print mold disarm err ] ] When I launch the function, I've encountered the following error message : ** Script Error: err needs a value ** Where: exec-cmd ** Near: if error? err: try [ do cmd ] How can I avoid this message and manage the error ? When the Rebol default evaluator sees a sequence of a SET-WORD! followed by a "complete" expression, it will assign the result of that expression to the named word. However, Rebol has the

The current in-depth documentation on variable binding targets Rebol 2. Could someone provide a summary of differences between Rebol 2 and 3? BrianH There isn't really a summary somewhere, so let's go over the basics, perhaps a little more informally than Bindology . Let Ladislav write a new version of his treatise for R3 and Red. We'll just go over the basic differences, in order of importance. Object and Function Contexts Here's the big difference. In R2, there were basically two kinds of contexts: Regular object contexts and system/words . Both had static bindings, meaning that once the