The Nineteenth Byte

@Calvin'sHobbies Sorry. Part of the ToS for Geocoins is that you'll never convert them directly to or from Nyancoins. You'll need a third currency proxy.

Alien G

@Geobits Don't forget the 41% tax.

BrainSteel

@Geobits Can Alex's points be traded for Geocoins?

El'endia Starman

@BrainSteel Wait, where are you living? I thought you were in Kansas...

quartata

Abandon all work dammit @BrainSteel

Alex A.

4:42 AM

@BrainSteel Maybe time_not_doing_homework-- :|

BrainSteel

I have exactly 70 of them

Alex A.

Legs?

Geobits

@BrainSteel Alex's points are wrong, so...

quartata

Clocks?

BrainSteel

@El'endiaStarman I meant 2:41 AM in 4 hours :D It's not that bad.

El'endia Starman

4:43 AM

Ahh, lol.

Calvin's Hobbies

@BrainSteel With your quantum computer you could do that in log(4) hours.

El'endia Starman

I was wondering if you were actually living in Greenland or something...

quartata

@BrainSteel I don't think you are in Kansas anymore

4

Alex A.

No I think he still is

Alien G

@El'endiaStarman He doesn't live on this planet.

BrainSteel

4:44 AM

Time zones are hard on mars :(

El'endia Starman

@quartata I was waiting for someone to say something like that... :P

quartata

Good. People got the allusion.

BrainSteel

@quartata If I didn't get the allusion, I wouldn't be a proper Kansas citizen :P

Alien G

@BrainSteel not if you have your quantum computers

quartata

@El'endiaStarman hehe

BrainSteel

4:45 AM

@AlienG Unfortunately, like my quantum computers, my motivation at the moment is theoretical.

El'endia Starman

@BrainSteel [lights a fire under your butt]

Alex A.

I'm only motivated to do things in theory.

I know exactly what you mean.

El'endia Starman

(Actually, that may or may not help since your chair is now on fire.)

BrainSteel

And, subsequently, my desk and papers.

Thanks.

El'endia Starman

On the bright side, no more homework!

Alien G

4:47 AM

@El'endiaStarman On the dark side, hospital!

El'endia Starman

> I'm sorry teacher, my homework got burned up by some guy on the internet.

BrainSteel

On the not-so-bright, my professors don't like the ol' "my buddy internet-burned my house down" excuse.

AAAAaaand ninja'd.

Alien G

@El'endiaStarman My fire ate my homework.

It may or may not of been force-fed

BrainSteel

crickets

Alien G

@BrainSteel faint nuclear explosions in the distance

BrainSteel

4:51 AM

I'm not sure I've ever seen "faint" next to "nuclear explosions."

Alien G

Sorry Microsoft, my college records were eaten by my nukes. oops

BrainSteel

There's no way it was my fault this time.

El'endia Starman

Stephen Colbert expression of nuclear explosions

►

Calvin's Hobbies

@Geobits How about Calvin's Hobbills? Rainbolt rubles? Doorknobucks?

Alien G

@El'endiaStarman Don't you mean my grades right now?

BrainSteel

4:54 AM

@AlienG I know that feeling.

Geobits

@Calvin'sHobbies I'd have to consult my charts. It's complicated, so maybe a challenge is in order. It's always better to get others to do my work for me.

Alien G

When I do a speech: youtube.com/watch?v=ewPburLEZyY

El'endia Starman

Just golfed an if-conditional in this Visual C# tutorial that I'm working through. Bahaha. :P

It was literally of the form

if (a + b == c)
{
    return true;
}
else
{
    return false;
}

So I just changed it to return (a + b == c); and it worked!

BrainSteel

5:09 AM

Haha, usually tutorials try hard not to be golfed.

El'endia Starman

I know, but this is for an example where I would be adding three more copies.

I didn't really want the if-conditionals to take up the whole screen, so I did this first. :P

Geobits

I don't C#, but those parentheses don't look golfed enough ;)

El'endia Starman

:P

Also...

// These integer variables store the numbers
// for the addition problem.
int addend1;
int addend2;

// These integer variables store the numbers
// for the subtraction problem.
int minuend;
int subtrahend;

Are minuend and subtrahend real words?

Geobits

Barely, but I've seen them before at least.

El'endia Starman

....apparently so!

DLosc

5:12 AM

@El'endiaStarman This raises an interesting question, though: in production code, which would y'all prefer, the one-line return, or the if statement?

El'endia Starman

I first saw "addend" last year, I think. :P

Alien G

@DLosc Y'all

DLosc

@AlienG (I'm asking everybody.)

Alex A.

@DLosc One-line return

Alien G

@AlexA. Yeah, should be fine with a one-liner.

DLosc

5:16 AM

That's what I figured, but I was a bit unsure whether my coding style preferences have been too influenced by this site. ;)

Alien G

Roses are #ff0000, violets are #0000ff, all my base are belong to you.

XD

DLosc

... spinach is #00ff00, and so are you?

Alien G

@DLosc Ouch.

The internet is the place.

Sp3000

I just came back after an hour and the starboard's already done a makeover o_O

3

DLosc

@AlienG #00ff00 in the environmental sense, of course...

Alien G

5:22 AM

@DLosc Course.

DLosc

Does anyone have further feedback on my tinylisp Sandbox post?

2

A: Sandbox for Proposed Challenges

Tiny Lisp, tiny interpreter code-golf interpreter recursion Lisp programmers boast that Lisp is a powerful language which can be built up from a very small set of primitive operations. Let's put that idea into practice by golfing an interpreter for a dialect called tinylisp. Language specifica...

Alex A.

@Sp3000 We did a celebrity makeover for the starboard

Dennis

5:41 AM

Hmprf! Python's Valve parser doesn't understand this question's format.

Anonymous

@DLosc Stuff like if(b == true) and return boolean_variable == true kills baby dolphins.

Anonymous

Stuff like if(a==b){return true;}else{return false;} makes puppies get abandoned.

Anonymous

Be kind to the animals, don't write stupidly redundant code

Anonymous

It doesn't add additional clarity, it just makes you look like an incompetent moron

Anonymous

And those are my thoughts on the matter

Alien G

5:59 AM

Ouch.

DLosc

... So, no feedback on the Sandbox post? :P

Alien G

@DLosc I'm not the one to ask XP

Anonymous

@DLosc I gave you an upvote, what more could you want? :P

DLosc

@AlienG Fair enough.

@Mego Thanks! Well, do you think I should ban eval/exec to avoid potentially trivial solutions in Lisp-family languages?

Thomas Kwa

@DLosc I'd recommend it

Anonymous

6:08 AM

@DLosc No, because I'd imagine the shortest Python solution would involve eval/exec in some way, and that would be an unfair detriment

Anonymous

Instead, I would recommend making the language not trivial to eval in LISP dialects

Thomas Kwa

The other option is to say "if there's a trivial solution using eval/exec in a Lisp language, please downvote it" but no one ever does

Actually, I think Mego's suggestion is better than mine

DLosc

The third option is to say "If there's a trivial solution using eval/exec in a Lisp language, it wins."

(I.e. is not necessarily a bad thing.)

But anyway, I don't know enough Lisp dialects to judge how possible that is.

I do know the Common Lisp language definition doesn't require tail-call recursion, but Scheme does.

I suppose the scope rules might make a translation infeasible... I'll have to make sure the test cases cover those robustly.

feersum

@DLosc What should happen if the result to print is a self-containing list?

DLosc

@feersum No such thing. Everything is pass-by-value.

tl> (d lyst (q (1 2 3)))
lyst
tl> lyst
(1 2 3)
tl> (c lyst lyst)
((1 2 3) 1 2 3)

See also my comment in response to your comment.

feersum

6:23 AM

Apparently I misunderstood in your earlier answer when you said you could define l to (l).

DLosc

The confusion probably stems from the difference between evaluated and unevaluated data/code.

If you have the list (l) and you don't evaluate it, it's a singleton list that contains a symbol--think of it like a string "l".

It doesn't have anything to do with the variable l unless you evaluate it.

If you evaluate it, since l is the first item of the list, it tries to interpret it as a function or macro and call it with the rest of the list as arguments (here, no arguments).

The trick is that if you type (l) in your program, it will be evaluated--unless you quote it with q.

So (l) in the code does a name lookup on l and tries to call the result as a function/macro; (q (l)) in the code evaluates to the actual list (l).

Clear as mud?

feersum

Yeah, I don't think I get it now.

Functions have to be quoted, but if you call a function it automatically tries to eval it?

DLosc

In Lisp, code is data and data is code. And most of it is lists.

Any list that you put in your code unquoted is interpreted as a function call.

So something like (+ 1 2 3) in the code will send 1 2 and 3 as arguments to the + function.

feersum

I don't understand when you would have to use v to use something that was quoted, and when not to.

DLosc

Yeah, it can get a bit tricky... I was going around and around for a while yesterday trying to code a map function.

You can think of q as freezing its argument, preventing execution of anything inside it.

So (q 4) is 4, and (q (+ 1 2 3)) is (+ 1 2 3) (and not 6).

Good so far?

feersum

6:38 AM

Writing (q 4) anywhere would be exactly identical to writing 4?

DLosc

For an integer, yes, because integers always evaluate to themselves.

(q 4) returns the integer unevaluated (which is 4); 4 returns the integer evaluated (which is 4).

feersum

Would (q (q 4)) also be identical to 4?

El'endia Starman

No, it'd be (q 4).

DLosc

^ The outside q is the only one that gets called.

The inside q gets "frozen" because it's part of the argument to the outside one.

feersum

Is it allowed to make functions other than by using the d statement?

DLosc

6:43 AM

You can make an anonymous/lambda function. In order to assign it a name, you have to use d.

feersum

Can you give an example? How would you make the parameter list?

DLosc

So any function is a list of two elements: the arglist and the expression.

The arglist is just a list of argument names: (x y)

Or, it can be a single name, in which case the whole argument list is bound to that name (like *args in Python).

feersum

This is also possible for macros?

DLosc

I'll get there in a sec.

Thomas Kwa

I think I have a truth-machine in 2 bytes.

DLosc

6:47 AM

The expression is any expression, which is probably going to be some other function call, written as a list of course.

(+ x y), for example.

Then we wrap both of those in a list.

But we don't want them to be evaluated right away, so we've got to quote them.

(q ( (x y) (+ x y) ) )

Alien G

(Sorry to interrupt this conversation) Does anyone here know anything about agriculture?

DLosc

That's the equivalent of lambda x, y: x+y.

@AlienG Not a whole bunch, besides some backyard gardening.

Alien G

@DLosc Best plants to bring to Mars?

I have no idea where to start, I need so much info on them ;_;

feersum

I think one of my biggest sources of confusion is thinking of q like an operator that creates a string.

@DLosc Actually what I wanted to ask is whether a function can be dynamically created.

DLosc

@feersum What q says is essentially, "Don't evaluate this thing yet."

feersum

6:52 AM

E.g. a currying or composition function.

DLosc

I think the current scope rules are such that currying isn't possible, though I could be proven wrong.

But I think one could write a composition function that takes two functions and returns a third.

It would take some rather involved list manipulation.

Hm... well, maybe currying would be doable, come to think of it. Just involved.

I'll have to try it sometime.

Anonymous

I have a REPL for Seriously! It doesn't do much, but it exists!

DLosc

7:10 AM

@feersum Ha! I did it! (Currying, specifically.) Might have to add to the test cases just cause it's neat.

feersum

Good to have some test cases that will stress-test it more.

DLosc

The list is getting pretty long already. ^_^ But I don't mind adding more.

feersum

@DLosc I'm reading the test cases now. So for a macro definition, the first parameter does not have to be an empty list directyl, but can be an expression that evaluates to an empty list?

Beta Decay

What's the file extension for a UNIX executable?

Anonymous

@BetaDecay Usually none

Beta Decay

7:20 AM

@Mego Ah that's good thanks

Anonymous

:)

DLosc

@feersum Technically not the first parameter, but the item before the parameter list.</nitpick> And you're right.

Actually, in the reference implementation, it doesn't matter whether it's an empty list or anything else as long as it's there.

Taking the example from earlier: (q ( (x y) (+ x y) ) ) is a function, but (q ( () (x y) (+ x y) ) ) is a macro.

I'll add more test cases before posting. But for now, buenos noches.

Anonymous

I'm going to bed too

Anonymous

I need to sleep on some design considerations for Seriously

Anonymous

Well, implementation considerations

Anonymous

7:35 AM

Whatever

VoteToClose

Martin Büttner

@quartata Oh, one important thing I forgot to mention about the truth machine: please don't call it a catalogue explicitly, at least not in the title. In theory, there shouldn't be any difference between a catalogue and a normal challenge (except for the lack of an accepted answer).

VoteToClose

ಠ_ಠ So. Close.

Beta Decay

upvotes a question and downvotes two other questions

VoteToClose

Lol. Please don't. >.>

Beta Decay

7:42 AM

1004

feersum

Yeah. Only @MartinBüttner is allowed to use the word "catalog" :P

I don't accept an answer for any code-golf question where multiple languages are competing.

VoteToClose

Oct 29 at 22:37, by VoteToClose

Sp3000

@xnor I like your glob of functions :P

VoteToClose

I just realized that I've made almost all my rep on AppleScript. This seems... backwards.

Martin Büttner

@feersum Did I use it in a challenge title?

feersum

7:58 AM

Beats me.

Martin Büttner

Also obviously I'd never use the word "catalog". I'd call it a "catalogue".

feersum

I see it as another spelling of the same word.

Martin Büttner

;)

Sp3000

+1 for catalogue

Also: looking forward to BF truth machine

El'endia Starman

8:21 AM

@feersum That's....all of them?

feersum

@El'endiaStarman No.

nhahtdh

I think I lower the bar quite a bit, though I see no one attempt at cracking it codegolf.stackexchange.com/a/61918/6638

Probably because I posted too late when the challenge has cooled off

Κριτικσι Λίθος

8:42 AM

0

A: Halloween Golf: The 2spooky4me Challenge!

Carrot (version ^3), 14 bytes #spooky(#+2)me Explanation: Carets ^ have now been made optional if you do not want to use commands. The # is the variable representing the input. Every instance of # is replaced with the value of input. Going to the parentheses, the expression inside the parenth...

@Mego

New Main Posts

11:08 AM

0

Q: Quine multiple times

Your task is make program that do following: You should take number. (Positive, negative, fraction is possible input) If it is negative, you reverse the quine. and negate that number(Become positive) Then you repeat (integer part) times and print first (floor(fraction part*length)) from your so...

New Meta Posts

11:25 AM

0

Q: Upvoted challenge but no answer

I'm confused by my question Fix the Meeesesessessesseesseessedessed upp teeexexextext. I get 7 upvotes but no answer. It is well defined, too, as Martin Buettner has fixed it during sandboxing. What's wrong with my question?

support

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