The Nineteenth Byte

Nobody Needs Names

12:02 AM

???

emanresu A

Looks like it's Flobnar @JoKing

Nobody Needs Names

@mods

Jo King

sounds good

"@Jok" actually did ping me lol

Nobody Needs Names

who's in charge of lyal?

aketon

wait whats happening

Nobody Needs Names

12:05 AM

lyal

who's in charge of it

Is lyal now?

Jo King

i mean, i'll probably be teaching flobnar this time round, i dunno who usually announces it

emanresu A

You can :P

aketon

what

Nobody Needs Names

I just saw this code: ᵖʳⅰₙｔ(*ﬁˡｔₑʳ(ﬆʳ.ⅰˢªˡₙｕᵐ,ᵐªｐ(ᶜʰʳ,ʳªⁿｇₑ(ºʳｄ('{')))),ˢᵉᵖ='')

(python) lol

Jo King

Welcome to the twenty-first Learn You A Lang for Great Good! Today, we'll be learning Flobnar, a 2D lang described as what you'd get if Befunge got drunk. During the event, feel free to post CMCs to practice Flobnar (FMCs), ask questions about the language, and so on.

4

emanresu A

12:11 AM

> Pip

Jo King

shhh

some useful links, the TIO interpreter and the documentation

Essentially it is a function style version of Befunge, with instructions having similar effects and with 2D navigation

emanresu A

This is so cursed

FMC: Factorial

Jo King

Each single character instruction either returns a value or calls other instructions in cardinal directions

Programs start at @ going left, and will print the final value that is returned (unless you use the -r flag)

emanresu A

Oh wait, there's a factorial example on the page :P

Jo King

well, try golfing it I guess

The directional commands ^v<> are all as you'd expect, simply calling whatever is in that direction. The # instruction will skip over the next instruction (note that blank spaces don't count as instructions, so this is slightly different to how Befunge's # works)

Dyadic instructions like arithmetic ones (+-*/%) will evaluate the first parameter from the north and the second from the south. On division by zero, the modulo and division operators will continue straight to get a value instead

 7
 -@
 5

will evaluate as 7-5 and output 2

There is a stack in Flobnar, but it's very different to Befunge. \ is used to push the value south of it to the stack, : can be used to retrieve the current top value, and $ to pop the top value before continuing. Note that this is only per evaluation, you can't push a value in one branch of the program and then use it in another.

:
$
+\<<\@
:7  9

This program outputs 16, where the bottom : evaluates to the 7 and the top one to the 9

@emanresuA I suppose i should also mention my answer at 19 bytes

Bubbler

12:38 AM

@emanresuA 24 bytes without looking at joking's

Jo King

the -d flag enables decimal input with &

Bubbler

ooh nice

Jo King

If a function would fail, e.g input with no input left or the aforementioned division by zero, the evaluation will continue in some direction to get a default value

Nobody Needs Names

how do i split an input intio two?

emanresu A

FMC: Print 1-100

Bubbler

12:45 AM

@NobodyNeedsNames push it in call stack with \ and use the "function argument" : to peek it

Nobody Needs Names

actually, i take that back

that's stupid

Bubbler

@emanresuA 17 bytes!

emanresu A

Woaj, you beat joking!

Jo King

very nice!

emanresu A

Why doesn't this work?

Jo King

12:50 AM

@emanresuA they go up/down, not left/right

i thought the same thing, it's more intuitive

Nobody Needs Names

just went ahead and golfed it

+<
5*<
+<^
5 ^@

emanresu A

Oh, because it wraps. Neat

In fact...

Jo King

yeah, you can usually translate code up or down, left or right without changing the behaviour in order to reduce whitespace

@Bubbler i was golfing yours myself and came across 16 but outputs the negative unfortuntely

Nobody Needs Names

3oh no

OldSandboxPosts

Sandbox posts last active a week ago: Decompress a Sparse Matrix (WIP), Find the best character arrangement, Photosynthesis [king-of-the-hill] [python]

Nobody Needs Names

1:03 AM

FMC, random number between 1 and 100 snicker

emanresu A

That's impossible

Jo King

flobnar has a random instruction (?), so not really

Nobody Needs Names

why

@JoKing almost as if you are questioning "flobnar has a random instruction"

emanresu A

@JoKing Oh

Jo King

uniform randomness would be very annoying though

Nobody Needs Names

1:10 AM

IT

S

possible: tio.run/##S8vJT8pLLPr/…

and i did it: tio.run/…

Jo King

@NobodyNeedsNames i was thinking more along the lines of 16 bytes

assuming 1 to 100 inclusive

Nobody Needs Names

is that uniform

Jo King

no lol

Nobody Needs Names

i keep getting really small numbers

Jo King

1/3 chance you'll get a 1, 1/3 you'll get a 4, otherwise increment

Nobody Needs Names

1:23 AM

increment what

Jo King

the number

Bubbler

Is @ functionally the same as < during execution?

Jo King

yup!

@NobodyNeedsNames on the next iteration it'll be 1/3 chance to get 2, 1/3 to get 5. etc

Nobody Needs Names

oh....

can it get 101

i think you can ;-(

@JoK There?

Jo King

1:39 AM

it moduloes by 100 each iteration, so no

Nobody Needs Names

oh

but can it get 100

@JoK ?

Jo King

eventually, sure

Nobody Needs Names

but it mods 100

or is it 101?

Jo King

approximately ~1 in 3^96 odds

Nobody Needs Names

and will it get 0?

Jo King

1:49 AM

it moduloes and then increments, so it is one indexed

Nobody Needs Names

oh

what's the next lyal?

Steffan

2:15 AM

Jellyfish probably

Jo King

2:36 AM

FMC: Cat program

Nobody Needs Names

@JoKing ~,@?

~,@

Jo King

this only prints one character

emanresu A

FMC: Hello, World!

A get-based approach is probably fastest

Nobody Needs Names

3:00 AM

<+,@
~
v<

perhaps

@emanresuA ~~a bunch of ~ and + and numbers and a @~~

Nobody Needs Names

3:15 AM

@jok

Jo King

doesn't seem to terminate? you know you can test these on TIO right?

it doesn't even reach the ~

Nobody Needs Names

bad formatting

but it doesn't work, why? tio.run/##S8vJT8pLLPr/30Zbx0GBS6FOgavM5v//kozMYgA

Jo King

it never terminates, so it never calls the print. additionally, this would print backwards lol

Bubbler

I'm not getting how this is different in semantics from my previous 17 (factorial)

Nobody Needs Names

what about this, why doesn't this work... does it only print after termination?

tio.run/##S8vJT8pLLPr/30bbQYGrzIZLx6bu//@SjMxiAA

Jo King

3:26 AM

@Bubbler ah, the default for EOF is below the & for some reason

Bubbler

oh

Jo King

i wish flobnar was more directionally ambiguous

i might make a equivalent ><> analog with updated syntax

someone remind me next lang workshop

emanresu A

@JoKing Ooh

Gotta love compilerPotions

Nobody Needs Names

3:42 AM

why doesn't this work

<+@
v<
,<~

and why does this output nothing

+@
,
1
+

but this does:

+@
>,1
+

And why does the example cat program

~,<
  +<@
  >^

does nothing?

emanresu A

@NobodyNeedsNames This loops forever because the two + are calling each other

(I think)

Nobody Needs Names

isn't it evaluating north and then south?

wait

good point, what if...

and it still doesn't work:

+@
1
,
+

Jo King

it outputs infinite sohs if that's what you want

Bubbler

damn, flobnar is way too vertical

Nobody Needs Names

oh

@Bubbler yes indeed

Why isn't this working?

+@
~
,
+

Bubbler

3:55 AM

this is interesting

Jo King

FMQ: Is there a way to terminate by error?

emanresu A

@JoKing Yes

Jo King

yeah, that's the only way I could think of

emanresu A

It might be possiblw to recursion error

Bubbler

@JoKing 16b, terminating

wow, this is clever

Jo King

4:11 AM

oh lol, i guess invalid instructions are also errors

emanresu A

Waiiit... Is Esolanging Fruit Chris Pressey?

Jo King

i'm pretty sure they aren't

stackoverflow.com/users/6996080/user2110704 is chris i believe

> Last seen more than 6 years ago

Nobody Needs Names

@JoKing yah

what does the flag do

tio.run/##S8vJT8pLLPr/305Bm6smxsGKy6DOikvBQOf//8Sk5JTU/7pFAA

@emanresuA Example program given:

Hello, World!
:
g<
0+<   6
\< 0 0v
 :,` |<\@6
>-^:#<6
 1    +<

Jo King

4:28 AM

-r supresses the final returned value from being outputted

emanresu A

@DLosc idea: Acc!!!, which is like Acc!! except there are no variables

Only Count while <expr> {

Bubbler

fun 67b HW

emanresu A

Trying to figure out how / why that works

Jo King

the return result of , is zero

emanresu A

Oh

OHHHH, the execution sorta zigzags

Bubbler

4:41 AM

yes, ignoring invalid commands using -i

Nobody Needs Names

what's -i again

is there even a documentation?

Bubbler

See here for flags

TIO uses Esolanging Fruit's impl

Nobody Needs Names

thnx

o/

Bubbler

5:58 AM

0

A: "Hello, World!"

Flobnar, 34 bytes Hello, World!� :> v: g|\@>!, 00> + Try it online! (Previous record: 41) The last character at the end of the first line is the null character \0. @ Start the program : : \ >!,g Initially n (top of stack) = 0. > + 0 Print the char at (n, 0), push n+1, and evaluate ...

Hello, World!

6:14 AM

1

A: "Hello, World!"

Flobnar, 34 bytes Hello, World!� :> v: g|\@>!, 00> + Try it online! (Previous record: 41) The last character at the end of the first line is the null character \0. @ Start the program : : \ >!,g Initially n (top of stack) = 0. > + 0 Print the char at (n, 0), push n+1, and evaluate ...

Nobody Needs Names

6:28 AM

good

Bubbler

7:21 AM

Somehow 1 to 10 is harder than factorial

New Posts

7:51 AM

0

Q: Add in the blanks

In this challenge you will be given a list of positive integers which represents some range of integers which has been truncated for display. Your job is to find the missing bits and insert ellipses to show that that part has been truncated. The input will always be strictly ascending and if two...

Sandbox Posts

8:49 AM

0

A: Sandbox for Proposed Challenges

Build a file/directory tree Task In this challenge, your task is to write a program or function which takes an array of paths with an additional boolean indicating it is a file or directory and outputs a file/directory tree in any reasonable format. Remarks Some directories can end with a forwar...

seshoumara

9:27 AM

hi, long time

I'm making a programming game. Can I use some of the questions asked here, or parts of them, as tasks for my levels? I won't use the answers.

by here I mean the codegolf.SE

mousetail

@seshoumara stackoverflow.com/help/licensing

creativecommons.org/licenses/by-sa/4.0

seshoumara

thanks

hmm, seems complicated, back to making my own. Although programming-related SE sites have all the serious and non-serious tasks under the sun :))

mousetail

9:44 AM

It's not that hard, just give credit and re-share your modifications

seshoumara

the sharing back is hard, I want to sell the game on Steam

giving credit is the easy part

Deadcode

10:46 AM

@pxeger Please don't mess with my posts like that. There's a reason I chose that font, and I have many other posts that use it in the same way. And using backticks doesn't give that font; I don't understand why you would try to make me think backticks give the same font as Mathjax.

I didn't use the regular header font for that because it could be confused with a language name.

There's plenty of compromises we have to do to make text look the way we want on StackExchange sites. For example, we also have to use <sub><sup>...</sup></sub> to get a small font. It sucks, but that's the way it is. So for this, using the Mathjax font to get a distinct-looking header is just what I'm stuck with.

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