Vim-golf

Dr Green Eggs and Ham DJ

04:24

Woah.

Does this mean V is like, official now?

Upgoat

Yes

Dr Green Eggs and Ham DJ

\o/

Leaky Nun

@DrGreenEggsandHamDJ I'd advice you to put links in the description

v.tryitonline.net

2

github.com/DJMcMayhem/V

Dr Green Eggs and Ham DJ

Good idea.

room topic changed to V: Discussion about the V golfing language github.com/DJMcMayhem/V (no tags)

Leaky Nun

Better to link to both

Dr Green Eggs and Ham DJ

04:26

So, what can I do as an owner of this room? Can I pin things?

Leaky Nun

@DrGreenEggsandHamDJ Not really?

Dr Green Eggs and Ham DJ

room topic changed to V: Discussion about the V golfing language github.com/DJMcMayhem/V v.tryitonline.net (no tags)

Leaky Nun

But you can:

schedule events
control access
manage feeds
move messages

Obligatory Hello, world!

Dr Green Eggs and Ham DJ

That works, but it's much better to use i instead of o.

o (o)pens a new line.

Leaky Nun

v.tryitonline.net/#code=aUhlbGxvLCB3b3JsZCE&input=

I'm still finding where all the commands are

Dr Green Eggs and Ham DJ

04:33

You got it. :)

Leaky Nun

so I basically just experimented in the tryitonline

Dr Green Eggs and Ham DJ

Unfortunately, the docs aren't that great right now.

Leaky Nun

without even knowing where the commands are

Not about the docs

github.com/DJMcMayhem/V

Dr Green Eggs and Ham DJ

An interesting thing to see in V is empty program + input.

Leaky Nun

None of the files here seem to contain the commands

Dr Green Eggs and Ham DJ

04:34

They're in keys.py

But that's only a tiny fraction of them.

The others are built in to neovim.

Leaky Nun

M_d_quote = chr(162)
M_at = chr(192)
M_D = chr(196)
M_M = chr(205)
M_S = chr(211)
M_a = chr(225)
M_d = chr(228)
M_l = chr(236)
M_m = chr(237)
M_q = chr(241)
M_r = chr(242)
M_s = chr(243)

Why this?

Dr Green Eggs and Ham DJ

M stands for meta.

Do you have vim installed?

Leaky Nun

not really

Dr Green Eggs and Ham DJ

It's highly recommended if you want to use V.

Leaky Nun

github.com/neovim/neovim

This one?

Dr Green Eggs and Ham DJ

04:36

Right now, important characters are unprintable.

I'm looking to fix this with a custom codepage.

What OS are you on?

Leaky Nun

Windows

Dr Green Eggs and Ham DJ

Linux: neovim, mac: macvim, windows: Gvim

vim.org/download.php#pc

Leaky Nun

oh ok

Any example program?

Dr Green Eggs and Ham DJ

For vim?

Leaky Nun

for V

Dr Green Eggs and Ham DJ

04:39

Oh. For learning or for showing off?

Leaky Nun

for learning

Dr Green Eggs and Ham DJ

Uhm...

IDK, I have to think of one.

How about, let's count to 10.

Which, will take way more bytes then a golfing language should.

So first, you need to insert a 1. You can do this with i1

From there, you need to insert a literal escape character, which unfortunately is unprintable.

First, let me teach you how to enter the program into vim.

open vim and press i

Now, type the program, which is i1<Ctrl+v><esc>

Then hit <esc> again to return to normal mode.

You know, It would probably be better to start with vimtutor, which you can run from the command prompt.

Leaky Nun

Which one should I install?

Dr Green Eggs and Ham DJ

The top link here: vim.org/download.php#pc

Sorry if this is confusing. Vim is famous for being hard to learn. It's not too bad if you learn it slowly and stick with it.

Leaky Nun

but..

Ctrl+V pastes something there

the something being what is in my clipboard currently

Dr Green Eggs and Ham DJ

04:52

Oh, that's weird. Try ctrl+q instead,

Leaky Nun

Done

what next

Dr Green Eggs and Ham DJ

So one of the quirks of vim is that it's modal. In a normal text editor, you hit a key and that key is entered.

You'll usually be in "normal" or "insert" mode.

Leaky Nun

I mean

it doesn't count to 10 for me

what does Ctrl+q and esc do?

Dr Green Eggs and Ham DJ

Ctrl+q let's you enter a literal "escape" character.

You know what, vimtutor could explain this much better than I can.

If you open cmd, and type vimtutor it'll give you a 20 minute lesson on how to use vim that makes it much less confusing.

Leaky Nun

ok

Dr Green Eggs and Ham DJ

04:58

The other thing that would help is if you could just copy and paste characters into your browser, but that doesn't work super well with unprintable characters.

So to count to 10 in V is i1<esc>9<M_q>Yp<C-a> The problem is, that's really hard to enter in the browser, which is why I recommend learning vim first.

Then you can just copy.

Leaky Nun

ok

Dr Green Eggs and Ham DJ

v.tryitonline.net/#code=aTEbOcOxWXAB&input=

As you can see there ^ <esc> and <C-a> (Ctrl+ a) are both invisible.

Leaky Nun

oh ok

I'll use a unicode converter then

Dr Green Eggs and Ham DJ

You could do that too.

esc is a hex 1b, and <C-a> is a hex 01.

rapidtables.com/convert/number/hex-to-ascii.htm

Leaky Nun

thanks

Dr Green Eggs and Ham DJ

05:05

Now I can actually teach you V, lol.

Sorry about that sidetrack

Leaky Nun

ok

Dr Green Eggs and Ham DJ

So the way that works is i enters "insert" mode. Everything up until the next <esc> is entered into the buffer literally. i1<esc> enters a 1, and then returns to normal mode. (where keys are commands)

9<M_q> means "9 times, repeat the following:"

Yp means "Yank a line, then paste that line"

and <C-a> means increment the number.

Leaky Nun

vimdoc.sourceforge.net/htmldoc/quickref.html

There are soooo many commands

Dr Green Eggs and Ham DJ

Yes, there are.

V is a superset of vim, so it has even more. (the ones in 'keys.py')

Anonymous

05:43

Wait why did I join this room

Leaky Nun

@DrGreenEggsandHamDJ are you here?

7

A: Shortest way to reverse a number

Vim 17 chars :se ri<CR>C<C-R>"

What is CR and C-R?

Dr Green Eggs and Ham DJ

@LeakyNun <CR> stands for "Carriage Return", e.g. enter. <C-R> is standard vim notation for ctrl+r.

Leaky Nun

I see

doesn't work for me...

Dr Green Eggs and Ham DJ

Yeah, it isn't working for me either.

Leaky Nun

How would you do it?

Dr Green Eggs and Ham DJ

05:56

Well, reverse is a pretty useful function (especially for a language that prides itself on string manipulation), so it should be a builtin. Right now however, this is the only way to do it.

Even though it isn't working.

I'm gonna fire up the debugger, see if I can figure it out.

Part of it is clearly working. v.tryitonline.net/…

Oh doi, I see the problem.

You confused "input" and "arguments"

Try this: v.tryitonline.net/#code=OnNlIHJpCkMSIg&input=MTIzNA

Leaky Nun

@DrGreenEggsandHamDJ I'm using the official vim to do it

how do I do it?

Dr Green Eggs and Ham DJ

Oh, I see.

How are you inputting the number?

Since Vim is not a typical programming language, input is taken very differently. So save a file with the number in it, then open that file in vim, then type the keystrokes.

Leaky Nun

06:16

so I can't use i?

Dr Green Eggs and Ham DJ

You could use i, although make sure to do <esc>0 afterwards, (since the default for vim golf is to start in normal mode at the beginning of the first line.)

Leaky Nun

and then what to type?

Dr Green Eggs and Ham DJ

For this program: codegolf.stackexchange.com/questions/2823/…?

Just type each key after that.

Leaky Nun

cool

how does it work?

Dr Green Eggs and Ham DJ

Did you read vimtutor yet?

Changing my explanation based off how much vim you know.

Leaky Nun

06:22

openvim.com

I read this

Dr Green Eggs and Ham DJ

Okay, that's pretty good.

so colon is used for the command line.

:q is quit, :w is write, :s is substitute, etc.

There's a lot of command line functions.

One of them is :set option or :se option for short. ri is an obscure option that reverses everything you type.

C (uppercase) is delete line and enter insert mode.

<C-r> is insert buffer, and " is the buffer that text is deleted into by default.

Leaky Nun

I see

Dr Green Eggs and Ham DJ

Hi aditsu

Leaky Nun

06:40

I just finished vimtutor

Dr Green Eggs and Ham DJ

Nice! Vim is really great even beyond golf.

Some good resources: vi.stackexchange.com

github.com/DJMcMayhem/dotFiles/blob/master/.vimrc

Leaky Nun

07:12

@DrGreenEggsandHamDJ Could you help me golf something?

Dr Green Eggs and Ham DJ

07:52

@LeakyNun I'd love to but it's pretty late here. Link to it here, and I'll sleep on it and ping you sometime tomorrow.

Leaky Nun

08:15

0

A: Display "Happy Easter!"

Vim, 374 keystrokes a _ _<esc>28a <esc>7a_<esc>27a <esc>a_ | | | |<esc>26a <esc>a(<esc>7a_<esc>a)<esc>10a <esc>a_<esc>14a <esc>a| | | |__ | |<esc>3a ____<esc>bi <esc>ea _ _ _____ ____ ___| |_ ____ ____| | | __)| |/ _ | _ \| _ \<esc>4a| <esc>a | ___) / _ |/___) _)/ _ )/ ...

I think that I should type T to replace |_| and then do :s/T/|_|/g

Transcript for