The Nineteenth Byte

1:21 AM

Does PHP not need echo?

@Sp3000 not with <?=

(with emphasis on the =)

that being said, it's a matter of configuring your PHP server, but most of them are configured to treat <?=...?> as something like <?php echo (...)?>

Sp3000

Ah k

globby

Nobody wants to read 10 pages of Jagl code...? XD

Sp3000

On my phone, sorry :P

Maybe later

globby

:P

Martin Büttner

1:27 AM

and I'm off to bed... if you haven't found anyone by tomorrow I might take a look ;)

globby

Alrighty

globby

2:07 AM

Anyone have any ideas of how I could get more people using my language?

feersum

give them $100 for each answer they wrirte in it?

globby

Great idea, though I think I may run out of funds quite quickly.

Sp3000

2:23 AM

Use it more yourself and show off how awesome it is?

New Sandboxed Posts

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A: Sandbox for Proposed Challenges

Ugh, what day year is it? (Title subject to change) popularity-contest Story It's a Thursday, the year is 3015. You awake in your living room, surrounded by the outcome of your drunken stupor. But... with the ever evolving dissociative beverage technology within the last millenium, you cannot...

globby

@Sp3000 Make more new questions then. It will only be noticed if it is, or is close to being, the accepted/most upvoted answer. Questions posted before the language was created render my submissions invalid

Sp3000

2:48 AM

@globby Where's the 10 pages of code?

globby

3:09 AM

@Sp3000 I'm out atm, you gonna be around for another 30-45 mins? I can send it when I get home

Sp3000

I'll be out in a bit, but if it's on Github I can take a look when I'm free

globby

@Sp3000 Alrighty, will push it when I get back and link you

Sp3000

Thanks :)

globby

3:47 AM

@Sp3000 github.com/globby/Jagl/raw/master/Function%20Usage.pdf There it be. If anyone else would be able to take a look at it, that would be great as well.

Sp3000

4:02 AM

What does (1 1 1) (1) - return?

Also rather than min/max, something to think about: if you implement get first/get last of array instead, then you can do min/max in two chars by sorting

globby

(1 1 1)(1) - returns ()

It doesn't just remove a single 1 from the array

and alright, I'll map those to q and Q (there are still a few unmapped characters)

Sp3000

kk so all instances - maybe make that an example? :)

globby

Alrighty

Sp3000

But yeah basically I'm trying to figure out whether some things are worth the 1/2 bytes savings to make them a command of their own

globby

Oh and min and max were changed so I have to re-do those in the function usage as well

I did most of the document last night and made some changes to the language this morning so I have to update it

Alrighty

Sp3000

4:15 AM

But I guess problems are needed to test on

Ahaha k

globby

If you gimme a couple minutes I can make the changes

Sp3000

How is sum for nested arrays different to flatten?

globby

Changes were made

and ((1)((2))(3))b gives (1 (2) 3) whereas ((1)((2))(3))E gives (1 2 3)

Sum can be used as a single depth flatten, and E is a recursive (full) flatten

Sp3000

I see

globby

Sum is implemented to take in an n length array, and basically push every element of the array, and n-1 + symbols, then evaluate

So that it can be used for a lot of purposes

Product is implemented in the same way

Sum is basically a foldLeft with + (and product with *)

but it saves a byte

Sp3000

4:26 AM

What happens if I want to cycle the stack anticlockwise but an array is on top?

globby

-1C

C takes an integer to work anyway

It isn't synonymous with c

Sp3000

Oh, right

What's the difference between g and s?

globby

I was thinking that the other day, 'g' is redundant

Will remove

Well, the minor difference is that 's' will leave an 'L' at the end if the integer is a Long

and 'g' will shave it off

Sp3000

4:47 AM

Hmm not sure if you'd want the L in general

I guess you could get rid of g then change s to work as g

globby

I haven't had to use L yet

so yeah I can remove it

Sp3000

Anyhow I think that's about all I have to say :) good luck with it

globby

Alright, thanks for the review of it (:

Now to try to figure out how to isolate regions of a specified color in an image with mathematica

Sp3000

Does Mathematica have an inbuilt FloodFill?

globby

Nope

(Which surprises me actually)

I could use Binarize[] with some function that selects only the certain color value

But that outputs a binary image

Got it

globby

5:17 AM

Kind of

globby

7:52 AM

Would it be against an unspoken rule to answer my code-golf question a second time?

It would be the SECOND shortest answer, by about 100 bytes

Sp3000

8:06 AM

If it worries you you can add it to your first answer as a footnote

But if it's different enough then might be okay?

New Sandboxed Posts

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A: Sandbox for Proposed Challenges

Inverse the matrix code-golfmath The name says it all. I am surprised that there is no preexisting question on calculating matrix inversion Given an nXn invertible matrix, your task is to output its inverse. Rules Floating point precision upto 3 decimal places is required You can assume tha...

Sp3000

8:20 AM

@Optimizer Ban randomly generating matrices and multiplying?

Optimizer

I was just thinking of that

Sp3000

Also the ban list might need to be broader

Because you might be able to, say, use matrix exponentiation with Cayley Hamilton

(Okay that was a bad example but you get my point :P)

Optimizer

should I simply ban creating random matrices and multiplying

or instead put a time limit that for the same input, your code should run in a deterministic time and the run times should be similar

Sp3000

I think time limit is easier to enforce

And can rule out things we wouldn't think of that are slow but short

Optimizer

but wording can be wrong in that big line

no, its not a time limit for the code to complete

its a limit that for the same input matrix, the code should complete in almost same time

Sp3000

8:44 AM

Oh... right

I was thinking of having a time limit just for small matrices though, to rule out brute force

Martin Büttner

11:25 AM

@Optimizer What happened to "let's not turn this into University Maths SE"? ;)

btw, I think you shouldn't specify accuracies in decimal places but significant digits... otherwise a number on the order of 1e6 has to be much more accurate than a number on the order of 1

and that's also how floating point numbers work... it doesn't matter how large they are, but only how many significant digits they have

As for your weekly challenge idea... I think it's too far on the art contest side and too little on the programming contest side... unless you specify the scenery rather strictly in which case I'm not sure how different it is from codegolf.stackexchange.com/questions/36109/ascii-art-calendar

Sp3000

Hey Martin, how often do you need to perform an operation on an element lower down in the stack?

Martin Büttner

@Sp3000 depends on the problem, but if I do it's damn annoying :D

Sp3000

I was thinking of a language where implicitly the bottom of the stack is A, the second-lowest is B, etc

And if you want to add the top and second lowest on the stack you could do B+

Not sure how useful it'd be though

Martin Büttner

yeah that would occasionally be handy

Sp3000

Only occasionally though, right?

Hmm...

My other idea was making things assignable to registers, e.g. 3~= means "assign 3 to ~", but I'm not sure about that one either

Would probably have to try on a few problems

Martin Büttner

11:42 AM

@Sp3000 is that any different from CJam?

(or GS for that matter)

Sp3000

Oh CJam has assignment

Didn't realise

Optimizer

:D

@MartinBüttner good point about digits

@MartinBüttner about ascii art, i want it to be a PC so that people can generate as per they like to get more votes.

its diff. from ascii art calender because this one will always have certain objects

Martin Büttner

@Optimizer well yes, and that gets it dangerously close to being an art contest

Sp3000

Is there a popcon for approximating images with ASCII? Like PbN

Optimizer

i agree, but its diff. from art calender is what i am saying

Martin Büttner

11:47 AM

@Optimizer oh yes, it is. I said if you did make the spec stricter it would become like ascii art calendar

@Sp3000 there might be something similar

Martin Büttner

1:39 PM

the number of C# submissions to Morse the New Year is crazy

VisualMelon

had great fun on that one

ProgramFOX

@MartinBüttner Yeah, now there are finally some C# answers to compete with.

VisualMelon

SE answer box is really sluggish for me in old Opera... I hope they've not changed something

Optimizer

3:23 PM

@MartinBüttner "Floating point precision of at least 3 significant decimal places is required" - how does that sound ?

Martin Büttner

3:44 PM

@Optimizer sounds good. Is there a limit on the matrix size?

Optimizer

@MartinBüttner no as its code-golf , I don't really bother about time taken by program

so ideally a generally written program should be able to cater all sizes

(since the normal inversion techniques are not limited by size too)

@MartinBüttner any particular concern about the size ?

Martin Büttner

4:03 PM

@Optimizer well the accuracy might depend on the matrix size.

Optimizer

any sensible upper limit u would suggest ?

Martin Büttner

4:18 PM

Well it would be enough if you said that your precision requirement is for a 10x10 matrix, say. Then solutions still need to be able to handle all inputs (as memory permits), but the requirement is easily testable.

Peter Taylor

4:35 PM

@Sp3000 In GS that would be -2$+

Martin Büttner

O.o I never thought of trying negative numbers with $ in CJam.

Peter Taylor

I discovered that about 6 months ago, I think. I can't remember now why I needed it.

Martin Büttner

@PeterTaylor I remember that I could have used it several times before. I think it could be shorter than storing the bottom thing in a variable sometimes.

doesn't work in CJam unfortunately

@Optimizer there's another request for CJam 2.0 ;)

Optimizer

5:09 PM

thought of it already

New Sandboxed Posts

6:25 PM

0

A: Sandbox for Proposed Challenges

You've been sent back in time to 1973 to fix history by writing a clone of Hunt the Wumpus. The first thing you need to code is the network of twenty rooms in the game. They correspond to correspond to vertices of a dodecahedron connected by its edges forming a dodecahedral graph. Each room co...

Optimizer

7:46 PM

very helpful Peter...

New Sandboxed Posts

0

A: Sandbox for Proposed Challenges

Reverse Polish Notation-ing! Your challenge is simply to write a function which converts a given sum into it's Reverse Polish Notation form. Input Your function will be passed in a sum, as a string, which may contain any of +-*/^() or a space. For example: 1+1 34 * 7^6 3 * (78 + 7) Output Y...

Doorknob 冰

8:03 PM

31

Q: How can I get a ruler at column 80?

As a programmer, I want to see a ruler at a specific column (usually 80), both so I see when I cross that column, but also to see how close I am getting to it so I can reformat my code early. The options I have found so far are all not achieving this goal. column-marker can not highlight a col...

Vim golf: se cc=80. Silly Emacs-ers... :P

globby

8:43 PM

lol

Peter Taylor

9:16 PM

@Optimizer You have to remember that what you're doing is writing a specification, and sometimes that requires expert knowledge in the subject domain.

In particular, there's no point putting a constraint in your spec if you don't know how to test that the submissions meet it.

New Sandboxed Posts

11:27 PM

0

A: Sandbox for Proposed Challenges

Can I sandbox a meta post here, or is that too meta? I'd like to see this, but only if it would be welcome, so I thought here might be a good place to find out whether to post it and if so how to phrase it. Examples of well presented questions meta Sometimes a question is underspecified or ...