The Nineteenth Byte

Downgoat

12:01 AM

I think then that is sign need to get new monitor :P

ATaco

Remove Spellcheck on that Textbox.

DJMcMayhem

Yes please

ATaco

12:54 AM

3D Polar graphs now work.

Down Wat

1:08 AM

how does one use these graphs?

ATaco

a-ta.co/grapher

It's math.js, functions labeled f... (where ... is optional numbers) will be treated as a line graph, p... will be treated as a polar graph. If given two arguments, like f(x,y) it will be a 3d graph.

You can also draw graphs explicitly using either line(func [, color]) or polar(func [, color])

You can also now use matrices to define colors.

So you can call line(_(x)=x, [0.5,0,1]) to give yourself a nice purple line.

I need to fix Stack Exchange eating my *'s...

Downgoat

1:36 AM

@DownWat is it possible to have link a seperate set of stories for a "school" with your rails thing?

Down Wat

@Downgoat huh?

Downgoat

so like right now to my understanding, the database has a list of stories. Could it instead have a list of schools (and each school then has a list of its own stories)

Down Wat

Yes it could

I will remake and post on github

Conor O'Brien

in the 2003 live version of Coldplay's yellow:

> There's no excuse to be sat down in this song, please, y'know. If you stand up, we'll buy you all ice cream.

Downgoat

@DownWat :D thanks

Down Wat

1:45 AM

@Downgoat yeah made a separate schools model and now integrating it into the stories model

Downgoat

wow that was fast

i should really learn rails

Conor O'Brien

@ATaco feature request: dragging to change perspective etc.

@Downgoat wasn't that thingy do today?

Downgoat

@ConorO'Brien yes

Down Wat

> do

Conor O'Brien

yes I did notice that. I refrained from editing so as to not spam the ping. Thank you for pointing out this mistake, how astute

Down Wat

1:50 AM

@Downgoat dk0.us:3001

Conor O'Brien

@DJMcMayhem you might benefit from using some sort of deepEqual method. If you're going for golfy, just do e=>e!="1,2" (note that this won't work with input arrays like [1,[2]] because they are cast to a string the same way)

Downgoat

@DownWat and can I get 1) list of schools as json and 2) stories for a certain school as json

Down Wat

@Downgoat 1. Yes, even right now, try it out, dk0.us:3001/schools.json 2. yes, soon™

Downgoat

10/10 this is great thank you so much

Question: is JSONP possible? i.e. e.g. /stories.js returns var stories=/*json*/

New Meta Posts

0

Q: New Tag proposal: analysis

I am currently taking two analysis courses at my university right now, and will likely be taking some form of analysis for the next two semesters as well so I thought I would try my hand at some analysis code golf questions. However when I searched [analysis] I came up with no results because th...

Down Wat

1:59 AM

@Downgoat dk0.us:3001/stories/by_school.json?school_id=1

@Downgoat Should I do that? I might be able to do that...

Downgoat

idk, I mean if it's not trivial it's ok I can do AJAX

Down Wat

@Downgoat Why not just use the templates in the application to provide functionality?

OK @Downgoat Pull the app, delete the database db/development.sqlite3, run rails db:migrate, restart server

Downgoat

@DownWat I can just do rm db/development.sqlite3?

Down Wat

yeah

Downgoat

2:13 AM

anyone here familar with apache? >_>

Down Wat

@Downgoat nginx is better

use it please

Downgoat

@DownWat ik ;_; but entire server runs on apache and it'll take me a while to make te transition

Down Wat

I think there's a config converter out there

Riker

2:37 AM

Downgoat

@DownWat Can I change the port it runs on? I'm deploying to server and it looks like port 3000 is used for node.js

Down Wat

@Downgoat Yeah. In the service file I gave you (have you made the modifications I suggested?) add the parameter --port whatever to the end of ExecStart

Downgoat

[Unit]
Description=Inventory Server
After=network.target

[Service]
WorkingDirectory=/var/www/api.vihan.org/stories/
ExecStart=/usr/bin/ruby /usr/bin/rails server --port 3001 --bind 0.0.0.0
Type=simple
PIDFile=i dunno what goes here

[Install]
WantedBy=network.target

@DownWat am I on the right track?

Down Wat

@Downgoat PIDFile=/var/www/api.vihan.org/stories/tmp/pids/server.pid

Downgoat

ok cool thanks :D

Down Wat

2:44 AM

Add a line to service saying User=www-data

chown the app to www-data

Downgoat

ok

Down Wat

and then change description to something more sane

Downgoat

chown -R www-data:www-data /var/www/api.vihan.org/stories right

Down Wat

because that was from inventory.dk0.us

@Downgoat yeah

Downgoat

>_> I am super careful with chown after centos incident

Down Wat

2:45 AM

@Downgoat Define centos incident. sounds scary

Downgoat

@DownWat read from here down:

Sep 28 '16 at 3:26, by Downgoat

dumb question: how to login as root without sudo command?

Down Wat

@Downgoat thkans

Pavel

@Downgoat su ?

Downgoat

Sep 28 '16 at 3:27, by Downgoat

root password is not wokring

Sep 28 '16 at 3:28, by Downgoat

shit root user is locked after too many incorrect tries

I am professional idiot

New Sandboxed Posts

0

A: Sandbox for Proposed Challenges

The Pedant's Cosine My boss just told me to write a cosine function. Being a good math geek, my mind immediately conjured the appropriate Taylor Series. cos(x) = 1 / 1! - x^2 / 2! + x^4 / 4! - x^6 / 6! + ... + (-1)^k x^(2k) / (2k)! + ... However, my boss is very picky. He would like to be abl...

Down Wat

2:48 AM

@Downgoat painful. why would you ever do that

@ThomasWard I have your $7.50

send me paypal.me link please

Downgoat

Sep 28 '16 at 3:34, by Downgoat

Wanna know how I got here? NPM wasn't installing packages in correct dir so without thinking I did what an SO answer proposed and did chown vihan:vihan /usr/bin

Down Wat

> without thinking

There's your problem

Downgoat

Goats are genetically disadvantaged, we cannot fly like ducks, instead we must do things without thinking which is how we end up 500ft up on edge of cliff

Down Wat

Have you played goat simulator?

Downgoat

@DownWat yes

Down Wat

2:51 AM

cool

Downgoat

@DownWat I put the unit file in /lib/systemd/system/storiesapp.service (or similar) right?

Down Wat

no

/etc/systemd/system/storiesapp.service

then systemctl daemon-reload

Downgoat

/etc/systemd/system it's where my daemons hide, it's where my daemons hide

Down Wat

kek

don't git too close, it's dark inside

Downgoat

@DownWat Do I also need to sudo systemctl start storiesapp

Down Wat

2:55 AM

yeah

and sudo systemctl enable storiesapp

Downgoat

Apr 14 02:55:20 vihan.org ruby[13413]: from /usr/lib/ruby/vendor_ruby/bundler/runtime.rb:13:in `setup'
Apr 14 02:55:20 vihan.org ruby[13413]: from /usr/lib/ruby/vendor_ruby/bundler.rb:121:in `setup'
Apr 14 02:55:20 vihan.org ruby[13413]: from /usr/lib/ruby/vendor_ruby/bundler/setup.rb:17:in `<top (required)>'
Apr 14 02:55:20 vihan.org ruby[13413]: from /usr/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
Apr 14 02:55:20 vihan.org ruby[13413]: from /usr/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'

oh no D:

oh yeah duh gem install

gem install throws an error?

Down Wat

can you machinectl shell www-data@ then cd in and bundle install

Downgoat

O_o TIL machinectl. Is entire app running in an VM?

Down Wat

No

Downgoat

> Unknown operation shell

Down Wat

2:58 AM

% machinectl shell www-data@
Connected to the local host. Press ^] three times within 1s to exit session.
[www-data@tera ~]$

@Downgoat machinectl can invoke a shell on the local host

Downgoat

Gem::InstallError: activesupport requires Ruby version >= 2.2.2.

but... but... I do have latest ruby

Down Wat

@Downgoat ruby -v

Riker

@HyperNeutrino congrats on HNQ

Downgoat

is ruby 2.4 or 2.3 better?

Down Wat

2.4

Riker

3:07 AM

@HyperNeutrino can I assume input is a numpy array?

Downgoat

can we all take a momment to appreciate how ruby's make script doesn't spew a bunch of uncomprehensable command to your terminal and instead kindly displays the file it's building

I appreciate this too much

user165474

@Riker What's HNQ?

user165474

And yes, you may, although there's already a Python answer using numpy.

Riker

hot network questions

shows up on the SE main page

click teh link

but cool, thanks

@HyperNeutrino did see that

user165474

@Riker Oh cool! Thanks :D And yeah, I saw your answer briefly.

Riker

3:11 AM

:D

yah

looks like 20 bytes shorter :D

user165474

Yeah :D :P

Riker

right now I'm going through my testing to make sure I didn't do a stupid somewhere

I've accidentally done that many times before

looks liek the code works though

Down Wat

@Downgoat I just built ruby2.4 if you want a zip

Downgoat

how does your computer build so fast wow

wait nvm

Down Wat

-j5

Downgoat

3:13 AM

DAMMIT

user165474

@Riker There's the one time I answered a challenge but for whatever reason it only worked on the specific test case >_> then again it was 2 am :P

Riker

ouch

Down Wat

@Downgoat what happened?

user165474

yeah...it was a pain to fix

user165474

cost about 50 bytes >_>

Downgoat

3:13 AM

I forgot -j flag exist ;_; and have been waiting like 8 minutes

Down Wat

will upload 1 sec

Riker

dot product is elementwise multiplication of two arrays right

it's late at night didn't sleep good

just double checking with sane people

user165474

yes :P

user165474

but I'm not sane btw

Riker

more sane than me

user165474

3:14 AM

def dot(a, b): return [a[i] * b[i] for i in range(len(a))]

user165474

@Riker That's debatable.

user165474

:P

Riker

>:U @julia seriously pls work

@HyperNeutrino ehhh I'm pretty sure I'm less sane

user165474

Ok if you say so :P

user165474

I forgot to add a list together sumwhere in my code...

Riker

3:18 AM

lol

Downgoat

bundle install
/usr/local/lib/ruby/2.4.0/rubygems/core_ext/kernel_require.rb:55:in `require': cannot load such file -- bundler (LoadError)
	from /usr/local/lib/ruby/2.4.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /usr/bin/bundle:6:in `<main>'

Riker

@Dennis how can I cast an array to a string in julia?

specifically a matrix

Downgoat

@DownWat thanks ruby for sane error messages

Down Wat

@Downgoat is that sincere or sarcasm?

Downgoat

sracasm

Down Wat

3:19 AM

relog, gem install bundler

Downgoat

ERROR:  Loading command: install (LoadError)
	cannot load such file -- zlib
ERROR:  While executing gem ... (NoMethodError)
    undefined method `invoke_with_build_args' for nil:NilClass

great

Down Wat

ah

you need to build the ruby zlib gem

install zlib dev libraries

Riker

@HyperNeutrino nice answr

I updooted

Dennis

@Riker tio.run/nexus/julia5#@59oG22oY6RjHMtVUJSZV6KhpJKopPn/PwA

user165474

@Riker Thank you. Nice spelling. :P

Down Wat

3:22 AM

then cd to ruby-dir/ext/zlib then make and make install

then gem install bundler

Riker

@Dennis you sir

Down Wat

you might have to do the same with openssl

Riker

are a genius

>:U still doesnt' work

user165474

@Riker Don't you need to include import numpy in your answer?

Riker

I don't think so?

I mean, it assumes numpy arrays are given

Pavel

3:25 AM

If in python you write a method in one file, you can call that method from another file with a nympy array without importing numpy in the original file.

user165474

i guess.

user165474

yeah okay.

user165474

Nice answer, I upvoted.

Riker

anybody who knows julia explain why this isn't working?

f=(a,b,c)->any((a.*b)==(b*c))

it should be the same formula as the other python answer

user165474

@Riker What are a b and c?

Riker

3:26 AM

call f([2 -3 -1; 1 -2 -1; 1 -3 0],[3; 1; 0],1)

a is the big matrix, b is teh smaller one, c is the eigenpair

user165474

This should be truthy?

Riker

yes

it's false

user165474

hm.

Riker

julia> f=(a,b,c)->any((a.*b)==(b*c))
(anonymous function)

julia> f([2 -3 -1; 1 -2 -1; 1 -3 0],[3; 1; 0],1)
false

user165474

Well (a.*b) is returning a matrix, not a vector, so it's not doing the right thing.

Riker

3:28 AM

wait a minute >_>

hm

user165474

Just do (a*b)...

Riker

you sir

user165474

lol

Riker

are a bigger genius than dennis himself

5/7 thank you

user165474

O_O

Riker

3:29 AM

>_<

user165474

did you just assume my gender

Riker

no?

user165474

:P (not that you're wrong jk)

Riker

I assumed dennis's

oh, 'sir'

Pavel

@Riker unpossible

user165474

3:30 AM

yeah

Riker

you sir

have worse spelling than the goat himself

/s

user165474

unless you remember my old username. even then you can't really tell

Pavel

Shouldn't that be gaot in that case?

Riker

ya

@Pavel too lazy

Down Wat

@HyperNeutrino Alex L?

user165474

3:31 AM

@DownWat Yeah, that was my old username here.

Riker

thanks @HyperNeutrino, @Dennis

:D got the answer (posted)

user165474

@Riker No problem. :D

user165474

@Riker I gave you a TIO link; I hope you don't mind :P

Riker

np

user165474

Someone VTC this? codegolf.stackexchange.com/questions/116441/java-program-help

user165474

3:37 AM

done

Dennis

@HyperNeutrino To be fair, Alex could still be a woman's name.

user165474

@Dennis Yes. That's why I said even with my old username you still can't really tell my gender

New Main Posts

0

Q: Java program help

Create a Java console program that prompts a user to enter a number. The program uses the input value to calculate and list the products of two numbers up to the entered number. For instance, if a user has entered 3, the program calculates the products between two numbers (e.g., 1x1, 1x2, 1x3, 2x...

java

user165474

>_> When @NewMainPosts oneboxes a challenge that already got closed :P

Pavel

@Dennis Github says "Alexander"

user165474

3:44 AM

@Pavel How do you know this >_>

Pavel

I clicked on your SE profile and is listed your Github

user165474

Oh

user165474

*facepalm*

Dennis

That's why I renamed my GitHub account to DennisMitchell before linking it. :P

You can still figure out my real name though...

Downgoat

@Riker :O there is fellow hooved animal in TNB?

Pavel

3:47 AM

Isn't your real name Dennis?

@Downgoat No

Downgoat

@DownWat um how do to this?

Dennis

@Riker Why do you use string representations in your Julia answer?

Wheat Wizard

Dennis

Also:

Wheat Wizard

Guys please don't vote to close the sandbox

9

Dennis

3:49 AM

It would be even shorter to compare string representations. tio.run/nexus/python2#jZDPCoMwDIfP@hQ9tiOV/hEHgk/… — Dennis ♦ 3 hours ago

Down Wat

@Downgoat install zlib and openssl dev libs, cd to ext/zlib, make, make install, cd to ext/openssl, make, make install

Downgoat

what is a dev libs?

Down Wat

development libraries

apt-get install libssl-dev zlib1g-dev

Downgoat

ah, thanks

Jan Dvorak

@WheatWizard but... there are far too many possible answers

Dennis

3:53 AM

@WheatWizard Or as duplicates of Things to avoid when writing challenges.

3

Downgoat

@DownWat hm :/ followed your steps but still get a:

ERROR: Loading command: install (LoadError)
cannot load such file -- zlib
ERROR: While executing gem ... (NoMethodError)
undefined method `invoke_with_build_args' for nil:NilClass

Wheat Wizard

@Dennis I think that one has merit

Down Wat

rebuild ruby