LispForum

Thank you very much, it didn't even occur to me to write an external function. Its blazing fast too! Thanks:)

Can you show me how I would use desetf in this case, not sure I understood the documentation

Here is the macro, a macro for cffi::mem-aref. I was trying to make it so I can setf it like you can with mem-aref, but can't figure out how to do it. Any help is appreciated. (defmacro ? (ptr type &optional (index 0)) `(cond ((pointerp ,ptr) (return-from ? (mem-aref ,ptr ,type ,index))) ((not (...

Thanks a lot! That is just what I was looking for. I really do appreciate all these great answers you have given me.

is there anyway to find the length of a number e.g.
would equal 10, or:
would equal 4

Thanks for your help on this..I just decided to convert it to a defun and that solved it

I really like mine that way..is there a way you can help me fix mine?

Here is the macro: (defmacro print-mat (mat &key to-file) `(cond (,to-file (let ((*print-case* :downcase)) (with-open-file (str ,to-file :direction :output :if-exists :supersede :if-does-not-exist :create) (dotimes (i 4) (dotimes (j 2) (format str "~a" (aref ,mat i j)) (format str &quo...

I'm using Emacs24 on Ubuntu 14.04 w/ SLIME and SBCL. I notice sometimes when I compile a file with M-x slime-compile-and-load-file it compiles ok but other times it doesn't. It says compilation finished (no warnings) in the mini-buffer everytime but sometimes I make changes to a file and compile it ...

Actually I grabbed the wrong one it was this I need to convert from line 199 at the above link: for( vector<Rect>::iterator r = faces.begin(); r != faces.end(); r++, i++ ) {} Also on the line 223 code: smallImgROI = smallImg(*r); I'll have to call r as a pointer because calling as: smallImgROI = sma...