Scheme 1: Feel the cool

[@kellybmackenzie]

This is amazing, thank you so much! Finding this in 2023 and it's still so helpful. I love Haskell and I've wanted to learn Scheme for the fun of it for a while now, and this series has been perfect for that! Thank you so much, I love this!!

[@ajbalaam]

Fantastic, so glad you liked it!

[@ajbalaam]

Writing your own Lisp seems to be an inevitable consequence of learning about Lisp :) I can't imagine anything more fun.

[@P4i3r]

This video deserves more views!

[@ajbalaam]

Thanks!

[@cthutu]

You're welcome. Great videos btw. It's wonderful that you take the time and effort to do these. I've written my own embeddable lisp derivative in C and it's a great journey. Even added features that don't exist in other lisps. As a seasoned programmer, I would recommend anyone learn lisp even if they don't use it as it will help them grow as a programmer.

[@abpccpba]

Have found you again after 13yrs. Feel much better now will go for it again. Thanks for showing MzScheme. Allen Kay of SmallTalk said they picked LISP to build ground breaking GUI etc.

[@cagan8]

Just subscribed, I dig the teaching style.

[@ananya10110]

Can't imagine it's 10 years old

[@KrisLi-o4b]

I still dig the cool, after 11 years!

[@AhItsArah]

Thank you for the awesome videos! :) It's a lot of help to all the Scheme beginners out there

[@ajbalaam]

Hi AhitsArah, thanks! Glad you liked them.

[@ajbalaam]

Enjoy them, and let me know how I can improve :)

[@vinapocalypse]

I feel you were talking too fast. It was very clear but your speaking style felt rushed

[@fredjones100]

You are the first person that has actually made Scheme seem almost understandable to me... I'm definitely not a programmer but I've written a fair number of small programs over the years out of necessity, mostly bash, python and awk (oh - and fortran, once!) Inspired by this video I was finally able to adapt a GNUCash report (a lot of GC is in Scheme) which has been defeating me for about ten years - trivial stuff really but without this video I'd never have succeeded! I can't see me ever choosing Scheme to write a whole program in, I don't think I have the brainpower - but after a decade and more of total bafflement I can just about see why someone might...

[@ajbalaam]

fredjones100 wow, brilliant! Thank you for taking the time to comment.

[@ajbalaam]

Hi Zach, thanks - glad you liked it!

[@sakuralu489]

I really like your video! Thank you for posting them!

[@SefraCorrea]

thank you very much !

[@ajbalaam]

Thank you - glad you enjoyed it!

[@nbme-answers]

Great intro! (From one youtube educator to another, thanks! (My videos, though, are agony compared to yours!)) And look, I'm already enjoying the parens ...

[@ajbalaam]

Thanks Peter!

[@JaviStn]

This video helps me a lot for some tasks at uni. Thanks!

[@ajbalaam]

Hi Javi Ivaj, glad it helped!

[@Rob-J-BJJ]

thanks mr.Balaam

[@RicardoSanchez-es5wl]

Awesome video

[@narekasadorian]

Excellent intro - thank you!

[@ajbalaam]

Thanks portal_narlish!

[@maindepth8830]

What are some projects i can complete in scheme

[@blueblacksliver13]

Great Video! A very useful introduction.

[@vishalkuttin3342]

Your example at 3:29 would be wrong because the operand uses a built-in function "abs". Since it uses a built-in function, the program won't run.

[@mbatu4]

He is not using a built-in function, he is writing the function "abs" itself. You are wrong.

[@ajbalaam]

Thanks John! Did you see the others in this series?

[@GegoXaren]

sort works differently in Chicken Scheme: (sort SEQUENCE LESS?) So the way to do it n Schicken Scheme is: (sort (list 4 6 5)

[@gavinothegreat5765]

ha! this was the problem I saw! thx

[@ValahulDeLaRovine]

Video Published on May 25, 2012

[@ken2cky]

Hey, how did you do it in Dr Racket? It says 'sort' is undefined... Edit: i managed to make it work: use "#lang racket" and "Determine language from source" at the bottom. Then (sort (list 9 8 7 5 2)

[@parthparikh7276]

The above method works for guile-scheme.

[@smtechsolutions3527]

Thanks for the video series

[@ajbalaam]

No problem, glad it was helpful!

[@johnpaulbasino]

Thank you for making this video. But could I suggest that a number of summarized timestamps will be found in the video description.

[@DragonSniper7]

Very helpful man! Thanks for the awesome videos.

[@ajbalaam]

+DragonSniper7 Thanks!

[@ajbalaam]

+Beta Rakhmadi Hi, I'm sorry I don't know anything about that. I do know the version of Scheme I used was PLT Scheme, which has been changed a bit and renamed to Racket - you can get it here: download.racket-lang.org/

[@betarakhmadi554]

+Andy Balaam Thank you very much. I would try to run that Racket scheme.

[@aRoamingDuck]

A good basic IDE for LISP and associated languages like SCHEME is called DrRacket. I suggest trying that one out for anyone looking.

[@ajbalaam]

Thanks devRanter, good suggestion.

[@kristypolymath1359]

In DrRacket, the sort() function isn't defined.

[@SoundsFromSound]

Excellent series on Scheme. Thanks so much for sharing these with us Andy! (Sidebar: what program did you use to create your slides and upload them to your site as HTML? Looks great!)

[@ajbalaam]

Hi Benjamin, thanks! For these videos I used S5: meyerweb.com/eric/tools/s5/

[@null-0x]

In DrRacket, with sicp language pack: 1. `eval` does not seem to work as expected. It always throws some error. 2. `sort` is not a built-in procedure.

[@ajbalaam]

Try to run the mzscheme command instead of drracket.

[@ajbalaam]

Hi Matt, good point.

[@AlancRodriguez]

Feel the cool

[@ruyangguo6495]

A littel schemer is the best scheme programming book I have ever seen. I like scheme,it's cool and simple but powerful .

[@MoronicAcid1]

爱扯淡的瞎撸 LULU How does it compare to SICP?

[@noboruwataya9369]

​@@MoronicAcid1 SICP is about computer science using Scheme, Little Schemer is about Scheme.

[@paulclarke595]

heya guy! love the tutorials, cant get eval to work on my Drrachet R5RS thingamajigger, its suppost to take environment arg too (wtf?!) hope to see more, streams and circular lists and such!

[@SPKAeros]

Very informative, sir. I'd learned Scheme about 3 yrs ago but I am a bit rusty.

[@georgepsarellis204]

Very helpful, thank you for this video Andy! I would like to ask you, how to compile Scheme. I have already installed Notepad++ and Scheme is included in its supported languages, but I just can't manage to compile. Thank you in advance! (PS This is a Windows user speaking :P)

[@ajbalaam]

+George Psarellis Hi, glad you liked it! You can download Racket, which is the new name for PLT Scheme from here: download.racket-lang.org/ Be warned though: the syntax is a little different sometimes. I think Racket might have a "compatibility" or "legacy" mode that supports true scheme though...

[@georgepsarellis204]

+Andy Balaam Thanks!

[@eralpsahin]

Thanks for the tutorials man

[@ajbalaam]

Eralp Şahin glad you enjoyed them!

[@Oliver-Zen]

Thanks :) it's reaaaaally interesting

[@scott123159]

Which scheme implement do you use?

[@patricklynch6214]

hi, i'm trying to download scheme. i tried the sudo command and it didn't work for me. I then wend to ply-scheme.org in order to download scheme. It told me to download racket - which i did. when i tried to invoke the racket application i was told that racket is not an authorized developer. any ideas as what i should do. thanks, patrick btw: i viewed the 7 videos and they were extremely helpful, thank you - well done

[@ajbalaam]

+patrick lynch I'm afraid I have no idea what happened there. I'm glad you enjoyed the videos!

[@chrisramsay8795]

how of interest what interpreter do u use for your scheme programming?

[@enditend2]

where is the map function? also let's say I want to run some function on a list and only return true if the function was satisfied , how do I do that? ( in other words I have a function that get a list and some f function and run f on the list)

[@ajbalaam]

enditend 2 I think you are looking for the the fold-left or reduce-left procedures (or their "-right") equivalents: community.schemewiki.org/?fold and en.wikipedia.org/wiki/Fold_%28higher-order_function%29 may help.

[@tazplay3476]

thank you !!

[@ajbalaam]

np LSMAlex, thank you.

[@orensampson]

thanks!!

[@ThePainkiller1982]

How can we generate a Random number ?

[@ajbalaam]

Type "(random)".

[@ThePainkiller1982]

+Andy Balaam doesn't work

[@CleverProgrammer]

without the quotes.

[@cyanuranus6456]

What do You Think Why did The Programming Language Creator Who Made "The Scheme Programming Language" is a Computer Coding Script. But The Logo is JUST a "Lambda" Symbol? An Upside-Down Letter Lowercase-Y?

[@null-0x]

May be because it uses lambda calculus?

[@freddief939]

Scheme is primarily a functional language. Why do you say '(kind of)'?

[@ajbalaam]

Farzin F Just because it's functional by convention and culture, not enforced to be pure. Probably "kind of" is unfair. "Primarily" would be better.

[@squiresuzuki]

Farzin F Lisps are impure functional languages, as opposed to pure functional languages like haskell and elm

[@freddief939]

I agree

[@gavinothegreat5765]

that sort didn't work for me

[@ajbalaam]

Hi gavino, are you using mzscheme? Some related languages (including racket, I think) have the arguments to sort the other way around.

[@duct.q.4402]

Andy Balaam I use DrRacket and sort doesn't work for me too. Language setting is on beginner. sort: this function is not defined. So I have to define sort first.

[@ajbalaam]

Duc Tran Quang Try mzscheme - it starts racket in a compatibility mode that should make it work as I've shown. Racket is no longer a dialect of Scheme, but a separate (similar) language.

[@duct.q.4402]

It works if I change the language level. But unfortunately for me my university wants me to use DrRacket with beginner language setting.. but it's ok, I was just wondering why it did work for you and not me. Anyways thanks for you answer.

[@ajbalaam]

Hi Duc, it's probably sensible for you to use Racket, but it's just a slightly different language from Scheme. Enjoy!

[@carlosmontiel7078]

Need a calculator please help!

[@darellarocho5729]

Woah

[@ajbalaam]

I know

[@cthutu]

Andy, for the last example you could have used map again: (map eval mycode) rather than introduce for-each.

[@JohnCLiberte]

(amazing 'thanks)

[@ajbalaam]

'(np :)

[@Yenaled1]

Please stop slamming your keboard

[@mlfconv]

C

[@C.G.W]

poor keyboard!