Scheme programming

R00ts · 08-03-2004, 11:09 AM

Wow, free lectures! I guess I don't need to pay tuition anymore

But are these videos on Scheme or Lisp? I don't see any mention to either, except that the first video is an introduction to Lisp...

llama_meme · 08-03-2004, 01:37 PM

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Does Scheme suppor procedural programming? I mean, not using functions or recursion but something like (thinking in C++)

Yes, it does support procedural programming. The C++ code you gave does have functions (well, methods anyway).

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you see I have to keep using function like expressions..... why not just define variables, etc etc?

Because there are many advantages to a functional style, but you can define variables if you like.

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the only thing close to variable assignment in scheme (that i learned) was (let ....) which you might wanna look into, but it seems to half do the job. I don't even remember too many specifics since I haven't written anything in scheme for a year :-x

Let does half the job, and the set! function does the other half. It's really very easy to do imperative/procedural programming in Scheme, although I'm not sure why anyone would want to, unless they just want to write C++ code in Scheme.

Alex

poeta_boy · 08-03-2004, 01:53 PM

the thing about trying to transport procedural into scheme is that I've only used that style so when I see a problem that has to be solved my instinct drive me that way... I find it quite tricky to change into another perspective (recursion and functions) but again, there's got to be a way

max_sipos · 08-03-2004, 04:41 PM

Well, I believe that, at the time, LISP = scheme

. These guys are pretty much the legends who actually invented the whole stuff (they worked in the AI lab at MIT, Stallman too, for the record)... the syntax is scheme (look at the function definitions in first lesson), and the simplicity.. Yet, the course is A LOT about good (and crazy, abstract) software development in general - learning a language, or using whichever one IMHO is not the "real" CS knowledge...

Best regards,

--
Maksim Sipos

max_sipos · 08-03-2004, 04:43 PM

I have to rant a bit more... Sometimes, in that course they really make you think they are wizards

(you can tell I'm biased, cant you?)

--
Maksim Sipos

poeta_boy · 08-03-2004, 04:52 PM

how long do you think it will take me to go through all the course? and how "deep" is it?

llama_meme · 08-03-2004, 04:56 PM

A few weeks probably. It's pretty deep

Really though you don't have to read all of it, or even read it completely in order.

Alex

max_sipos · 08-03-2004, 04:57 PM

Well there's good 20 hours of lectures (you need a good internet connection to download that), and if you want to be serious, you'd probably do the assignments from the book as well. The course will definitely make you appreciate functional programming and this whole 'abstract thing'... I heard that this is (used to be?) the only CS (EE) freshman introductory course @ MIT where you actually learned to program, the rest (four years) was theory - as I believe it should be.

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Maksim Sipos

poeta_boy · 08-03-2004, 05:18 PM

hehehe now I'm starting to get scared hehe I'll try my best.... you wouldn't happen to know another course like that but now about 3D modeling or openGL would you??

Abstract... that's how I need to become

beginner54 · 03-30-2006, 11:14 AM

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Originally Posted by max_sipos

I'm a huge fan of scheme as well; I'd like to point out a wonderful introduction to the language, an entire MIT course available on the web (together with the book) in form of video lectures: The Structure and Interpretation of Computer programs:
http://swiss.csail.mit.edu/classes/6...sman-lectures/

Can you help me on this, I can't get it right

Develop the function My-Grade-Is-B. which returns true for any grade between 80 - 89 and false otherwise

(define (My-Grade-Is-B G ))
(cond
[ (and ( > = 80 G ) ( < = 89 G )) ]