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[REBOL] Re: "get" function

From: dukeofperl:ml1 at: 9-Nov-2010 21:47

On Tue, 9 Nov 2010, Ed O'Connor wrote:
> > So, in a nutshell, `:blah' is identical to `get blah'? > > -- > > Duke > > -- > > As far as I know, yes, although the get notation is probably quicker. > > if is the standard or natural form; it refers to the action of > returning any referenced value > if: is the "set form"; it refers to the action of assigning if to a value > 'if is the literal form; it refers to the word/symbol, isolated from > any value it references > :if is the "get form"; it refers to the referenced value, isolated > from any word handles on the value > > If you evaluate native? if, you'll run into a problem because you used > the natural form of if, which means it will trigger the dereferencing > process (which requires arguments to be supplied to the function). > > You can inspect the function value referenced by if just like a > series. To do this, use the get-form (or the get function) and use a > series function: > > >> first :if > == [condition then-block /else else-block] > >> second :if > == none > >> third :if > == [ > "If condition is TRUE, evaluates the block." > condition > then-block [block!] > /else "If not true, evaluate this block" > else-block [block!] > ] > > if is a native in R2, so there isn't much to access here. A function > like probe might be better, since it's a mezzanine. Here are some of > the guts of the simple probe function. > > >> second :probe > == [ > print mold :value :value > ] > >> first second :probe > == print > >> second second :probe > == mold > >> do first second :probe "hi Duke welcome to REBOL" > hi Duke welcome to REBOL
Thanks Ed! I'm going to have to study and digest your reply a little more. No time for it today. Much obliged. -- Duke