Hacker News Board Hacker News, browsed like a classic message board
Live data from Hacker News

Land of Lisp is finally out...and has a music video.

landoflisp.com

Post reply on HN
Print view View original

111–115 of 115 posts

Re: Land of Lisp is finally out...and has a music video.

#111

Post by ponnap »

speek wrote: post #23
drcode wrote: post #2

Hi HNers- I'm Conrad (aka drcode) the author of said book. Thanks guys for helping build the buzz around LOL! (I should also thank pg for getting me into this stuff in the first place.) I'll be lurking in this thread today and tomorrow... feel free to post any questions about the book or about Lisp in general and I will answer them. Here's the only coupon code currently for the book. I'm posting it exclusively on HN…

Congrats on the release. I'm excited to finish reading the book. I just thought you should know, however, that there's a minor mistake (I think) in some of the walkthrough stuff in the pdf. On page 56: > (defun pudding-eater (person) (cond ((eq person 'henry) (setf *arch-enemy* 'stupid-lisp-alien) '(curse you lisp alien – you ate my pudding)) ((eq person 'johnny) (setf *arch-enemy* 'useless-old-johnny) '(i hope you c…

It seems to work for me.

  CL-USER> (defvar *arch-enemy* nil)
           (defun pudding-eater (person)
             (cond  ((eq person 'henry)(setf *arch-enemy* 'stupid-lisp-alien)'(curse you lisp alien - you ate my pudding))
           	    ((eq person 'johnny)(setf *arch-enemy* 'useless-old-johnny)'(i hope you choked on my pudding johnny)) 
          	    (t'(why you ate my pudding stranger?)))) 

  PUDDING-EATER
  CL-USER> *arch-enemy* 
  NIL 
  CL-USER> (pudding-eater 'johnny) 
  (I HOPE YOU CHOKED ON MY PUDDING JOHNNY) 
  CL-USER> *arch-enemy* 
  USELESS-OLD-JOHNNY 
  CL-USER>

Re: Land of Lisp is finally out...and has a music video.

#112

Post by TeMPOraL »

Congratulations on the release! Music video and the comic (Continuation guild reminds me of Arilou ships from StarControl II) are AWESOME and made my day. I'm currently trying to get money for paper version of the book.

By the way, I've shown the music video and the comic to friends of mine, and two of them actually got interested and started to ask questions about Lisp. Their positive reaction makes me think that those materials could be good to show to people to get them seriously interested in parenthesis-oriented-programming ;).

Re: Land of Lisp is finally out...and has a music video.

#113

Post by mahmud »

phob wrote: post #109
mahmud wrote: post #93

Earlier quoted context omitted.

I think it was Appel who had a funny proof for the non-existence of the Perfect Compiler, it can be applied to Lisp quite easily. FWIW, the proof used the halting problem and went like this. Assume there is a an unoptimized program that, when ran, would go through a series of motions but ultimately halt without any useful output or side-effect. Assume there existed a perfect compiler, PC; that compiler would need to…

Actually, this could be done if the program didn't use any print or input commands. In general, it still cannot be done.

I said "without any useful output or side-effect". I/O falls under those categories.

Re: Land of Lisp is finally out...and has a music video.

#114

Post by danpker »

drcode wrote: post #59
danpker wrote: post #34

Earlier quoted context omitted.

Clicking on them doesn't do anything for me (Safari), what do they do?

Anyone else with Safari having a problem? Please reply here so I know if a fix is still needed.... Clicking on the "throbbing text" should pop up a window.

It's fixed for me now, it may have just been my net connection. The descriptions are awesome!
Post reply on HN