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Brute Force Compiler by Fanny Grandford - Sun, 19 Mar 2017 14:35:03 EST ID:8Wkw9vVF No.36625 Ignore Report Reply Quick Reply
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I've just made what I call a brute force compiler. How does it work? Well it occurred to me that since a program is simply a sequence of bytes we can actually enumerate all the possible programs. So it does that, and runs each one in an emulator until the tests all pass.

One test is that the program should not have written to, read from, or branched to any byte in memory that it hasn't explicitly been given read write execute access to. Just to prove the idea, I put a second test in and that' passes if some memory location, which was initialised to 0, contains some non-zero value after the program has run. Sure enough, the compiler produced the following code (in 6502 assembly):
dec $7F
(that decrements the memory location I specified, so since it was initialised to zero now it'll obviously contain a non-zero value). And this is the shortest program that passes this test, and dec is the first opcode numerically which modifies a memory location in the necessary way.

My idea is that if we have enough tests, then we can use this to generate a program which matches some specification. (And since the programs are tested in a certain order, we also know that it's the shortest possible program that matches the specification).

So the next thing is: How can we get these necessary tests? Maybe I can automatically generate them from running an equivalent program. Maybe I can generate them from source code. Any ideas about that? Or any ideas about how useful this whole contrafibulation might be?
Fuck Sigglekork - Sun, 19 Mar 2017 15:43:37 EST ID:S3TDz6jS No.36626 Ignore Report Quick Reply
What you have is logic programming and not-quite-genetic programming. I think the first problem you'll run into is that constraints are really hard to think about, often harder than solving the problem yourself. The second is that even far more sophisticated approaches are very slow in practice. These are the reasons Prolog isn't popular.
Martha Wudgeridge - Sun, 19 Mar 2017 17:42:47 EST ID:9QSfnS0r No.36627 Ignore Report Quick Reply
There is current research on a topic like that.
The researchers have created a neural network capable of generating source code for a program that produces a required output scheme.

In a sense it's the only currently somewhat plausible way to do that.
Archie Bottinglack - Mon, 20 Mar 2017 03:50:28 EST ID:P6PS9CBz No.36628 Ignore Report Quick Reply
This sounds like the principle applied to superoptimizers:

The problem (both with your idea and with superoptimizers) is that with larger programs your search-space expands too quickly for it to be feasible to search all possible sequences of program bytecode. If you query:
Find me the fastest program that does this thing in less than 4 bytes, you're searching through 2^32 possible (though not necessarily valid) program sequences, but if you expand the search to 8 bytes then you're already at a size too large to search on a single computer in a human lifetime at 2^64 program sequences.

If you restrict your search to only valid programs, then the possibility-space is reduced, but only linearly so you're still stuck with the exponential-search issue only now you have fewer possible programs to enumerate.
Phoebe Fanlock - Wed, 22 Mar 2017 16:57:02 EST ID:8Wkw9vVF No.36631 Ignore Report Quick Reply
Thanks for all your thoughts and input thus far.

>constraints are really hard to think about
So maybe this thing would have a hard time with functions that have side effects and other unknowns and things which are hard to reason about (luckily those things are rare in good programs). But maybe this thing would work okay on a function which returns a value or set of values given an input. Something like a keyboard matrix decoder or a mathematical function. The constraint would be as simple as "You can use this region of memory for your own purposes. You can read from these locations. Put the return value here. Here is how the inputs map to the return value, including the don't-cares."
Of course, that might still be hard to compute...

I haven't had time yet to read that paper properly yet, but the skim has been interesting. Neural nets are another interest of mine

One application that has a (relatively) small search-space: automatically finding the transformations for a peep-hole optimizer. A peephole optimizer might look at four bytes at a time, seeing if a four-byte sequence may be replaced by shorter sequence.

python and you and me and you also by Lydia Cinnerkutch - Thu, 16 Feb 2017 16:17:09 EST ID:1UV84ceD No.36510 Ignore Report Reply Quick Reply
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Hi this forum was helpful with teaching me a pythonic way to do something before so I'm hoping you can share another pattern with me for a new problem I have.

Using pandas to merge two dataframes based on time series info how can I expand the values in one dataframe that is based on daily information to match the dataframe based on the minute. I have two time columns one in format day/month/year ti:me in ten minute intervals and the other is day/month/year. So sample data looks like:

Time - A - b
1/1/2017 00:00:10 - 5 - 6
1/1/2017 00:00:20 - 3 - 2
1/1/2017 00:00:30 - 4 - 4 etc
&& in the other dataframe I want to merge it is

Time - Value1 - Value2
1/1/2017 - 9 - 1
1/2/2017 - 5 - 6
So it should look like
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Fanny Tillingfield - Sat, 18 Feb 2017 04:30:27 EST ID:dluvNLbx No.36513 Ignore Report Quick Reply
  1. Pandas isn't Python. The Pythonic solution involves a list comprehension and isn't what you want to do.
  2. Unless you're interested in the continuity of your date+timestamp value, I would split that permanently.
  3. Once you have a simple date column in each DF, what you're looking to do is merge: merged_df = df1.merge(df2, left_on='date', right_on='date', how='outer')
  4. 2017-01-01. That's how you'll format dates now. Forever.
Phoebe Blemmlepire - Sat, 18 Feb 2017 04:41:18 EST ID:9QSfnS0r No.36514 Ignore Report Quick Reply
Why do store time/date in this fashion? Use unix timestamps and some library like dateutil to parse them.
I'd convert the time/date into timestamps the first chance I'd get then it's just a regular value and easy to deal with.
Edwin Brondleforth - Tue, 21 Mar 2017 20:10:27 EST ID:JW2J65bb No.36630 Ignore Report Quick Reply
df1.merge(df2.reindex(index=df1.index, df1, method='pad'))

Basic question from the unenlightened by William Wingerwedge - Sun, 19 Feb 2017 09:20:55 EST ID:3mRefssQ No.36515 Ignore Report Reply Quick Reply
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With programming I know that theres levels to this shit, So I wanna know: Where can I go to learn VBA/SQL

I feel like getting a good grasp on advanced excel and access would help me tremendously when im looking to learn future programming languages
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Graham Farryfock - Mon, 06 Mar 2017 16:15:08 EST ID:rAGFRmkY No.36596 Ignore Report Quick Reply
It Will Help U With VB6 and VBS not much more.
Reuben Habblemot - Fri, 10 Mar 2017 02:27:40 EST ID:AljP2dDh No.36606 Ignore Report Quick Reply
Go check this shit out. When it says "the hard way" it means learn by fucking doing it. It's straightforward. Learning SQL is a good investment of time.
William Cushwark - Sat, 11 Mar 2017 14:56:14 EST ID:9QSfnS0r No.36607 Ignore Report Quick Reply
No it's a case of unwarranted self important of the author that thinks teaching without explanation of the fundamental concepts would yield a better understanding.

This teaches by example too, but isn't dated shit. And it's not run by people trying to insult your intelligence.
Polly Garringwat - Sat, 11 Mar 2017 15:33:41 EST ID:b2Dm/aZr No.36608 Ignore Report Quick Reply
But apparently it's run by people who want you to have an account. What ever happened to people reading a fucking manual and going over production code?
Frederick Demblenat - Sat, 11 Mar 2017 21:21:37 EST ID:9QSfnS0r No.36609 Ignore Report Quick Reply
The other thing want you to pay 20 bucks, (which also requires an account of a sort) whichever is worse?

>What ever happened to people reading a fucking manual and going over production code?
"Web 2.0" happened.
Back in the 00s you were fine only knowing about 3-4 different technologies to get a decent paying job in the IT sector. If you knew the LAMP stack you were golden already. Today you need to know 30-40 technologies to get a similar job and reading up on the official documentation of all of those would take longer than some of those are are considered the state of the art. (I slightly exaggerated)

Perhaps it's also that SW development has become a normie job in a way, heck people learning it communicate over Facebook groups instead of IRC and you are considered a uber nerd already if you code for fun.

First programming language(s) to learn by Samuel Bardwater - Tue, 28 Feb 2017 04:15:25 EST ID:s5UXSHt+ No.36573 Ignore Report Reply Quick Reply
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I was thinking of starting to try to learn python. I was just wondering, I know I can easily search up stuff but I want some stoner programmers to give me an idea of whether or not I want to pursue this. I wish to make MUD like games but with a GUI. What is the best language(s) to learn to make MUDS
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Augustus Mippershaw - Wed, 01 Mar 2017 15:44:13 EST ID:9QSfnS0r No.36579 Ignore Report Quick Reply
I didn't say that, doing the approach I mentioned and writing as much as possible in python and for instance a backend tool like flask would be my choice for this exercise for instance.
I just would advocate against a complete newbie trying to write a game in pygame or even worse with opengl bindings.

The one alternative that would make sense for me in that regard (writing a game to learn programming) would be processing.
It entirely depends on OP's background though, and I realize my suggestion was the least possible nerdy way do do it.

So, OP
If you really want to learn programming as a hobby, and definitely don't care about doing it in any modern way you could take a look the demoscene...
In the archive/the ftp there are files about learning coding the way you used to learn it from the 90s onwards. And you'd start with C/C++, perhaps a little bit of OpenGL.
You might as well start here:
Augustus Mippershaw - Wed, 01 Mar 2017 15:48:13 EST ID:9QSfnS0r No.36580 Ignore Report Quick Reply
I couldn't leave without pointing out this is BS.
I've written full games on a graphical calculator with 32K program memory in BASIC. Do you even know what a mud is?

Quick look it up....
right, thought as much :)
Phineas Brecklestock - Wed, 01 Mar 2017 16:42:41 EST ID:JfvrqUKV No.36581 Ignore Report Quick Reply
Just because MUDs are simple doesn't mean your first MUD won't be hot garbage.
Augustus Mippershaw - Wed, 01 Mar 2017 17:03:54 EST ID:9QSfnS0r No.36582 Ignore Report Quick Reply
Phineas Brecklestock - Wed, 01 Mar 2017 18:18:25 EST ID:JfvrqUKV No.36583 Ignore Report Quick Reply
True story: 20 years ago I made a large multiplayer map for an RTS (also simple), spent a long time uploading it over my Motorola 28.8, and two minutes into playing it with some strangers I was like holy shit everything about this was a mistake and I just disconnected.

Simple Linux Dev by Clara Woshtug - Mon, 20 Feb 2017 03:11:37 EST ID:YL0YFsWq No.36519 Ignore Report Reply Quick Reply
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I want so accomplish something very simple with my CentOS webserver, but I'm not sure where to begin.

I need to visit a URL to some JSON then convert the JSON to a SQL insert statement, and I want it to run every 30 seconds lets say, forever.

There's nothing there that sounds particularly difficult but I don't even know what search terms I should be looking at. Any help is appreciated.
4 posts omitted. Click Reply to view.
Clara Woshtug - Mon, 20 Feb 2017 17:16:44 EST ID:YL0YFsWq No.36524 Ignore Report Quick Reply
Cool, jq looks like exactly what I needed, thanks.
I was going to hack something together but this looks perfect

Thanks, seems like I'm on the right track. I've saved your example for tinkering with.
Phineas Barryway - Tue, 21 Feb 2017 22:17:07 EST ID:YL0YFsWq No.36525 Ignore Report Quick Reply
I literally just spent 8 hours trying to install and set up fail2ban because, of course, within about 30 seconds of the server coming online it was being hammered by chinese bots. Turns out it was a problem with fail2ban that is being fixed right now. Fuck.
Fanny Gudgespear - Fri, 24 Feb 2017 16:04:55 EST ID:9QSfnS0r No.36570 Ignore Report Quick Reply
Ugh, fail2ban is a stupid stopgap measure and I can't stand that it's a common practice.
I it were up to me everything that's not intended to be accessed by the public would be behind a ssh tunnel. I know end user authentication and all that stuff is still an issue.
Again if it were up to me I'd just fucking force them to use a password which has enough entropy. Ever had to beg to be white-listed from a spam blacklist because some retard use the name of there dog as a password?
Cuz fail2ban won't save you that hassle, believe me.
John Hocklehood - Sat, 25 Feb 2017 00:04:50 EST ID:YL0YFsWq No.36571 Ignore Report Quick Reply
Fair enough, this is the first time I've had to administer a Linux server or even any kind of server. I noticed there were a lot of failures in the log so fail2ban was what I ended up with after a few minutes of searching around.

There's only me accessing it and it's just a cheap $5 box that I can trash and rebuild whenever but I'll look into what you're suggesting if you give me a link or two to readup.
Frederick Fannerforth - Tue, 28 Feb 2017 07:02:30 EST ID:YL0YFsWq No.36575 Ignore Report Quick Reply
Not that anyone cares but the server is up and running and everything is ticking along nicely.
I have scripts that are recording all the threads created on another chan board so I can do some analysis on trends, repost, etc.

Once the infrastructure was in place it wasn't hard to add some logging for 420chan. I am polling http://api.420chan.org/stats.json every 30 mins so hopefully in the future that I can produce some dank graphs, but there's isn't much info exposed.

server prob? by no name - Wed, 01 Feb 2017 14:15:17 EST ID:g3naDofA No.36494 Ignore Report Reply Quick Reply
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is it possible to have 1 server (probably at your backyard or basement) and that would provide your website to whole world. . . i cannot afford to have servers on another country, and can somebody also reccomend a good server with at least 8gb ram. more man 4gb/s speed and storage of at least 500gb. . .
and how much will this whole cost me,.
if you have books on this topic pls include . i am just new to this server management and programming world, (you might have figured it out, i donot have money to pay for my college)
Hamilton Drallynadge - Wed, 01 Feb 2017 17:41:56 EST ID:Ep0R/dTc No.36495 Ignore Report Quick Reply
What are you trying to do exactly? Can you use a free or distributed hosting solution instead? Where are these numbers you have coming from?
Augustus Nickleworth - Tue, 28 Feb 2017 02:46:04 EST ID:E1Wm7o2Y No.36572 Ignore Report Quick Reply
Every piece of hardware can be turned into a server. As long as the machine has RAM, CPU and hard disk, you're good to go. That means that you can turn an old laptop into an okay-ish server.

I did the same thing from scratch and without knowledge last year with my old college laptop from 2005 and it went OK. It is REALLY confusing at first, but as long as you can google while doing things, you can do anything.

Get your hands on a piece of hardware.

Install a free OS (server edition). Example : ubuntu server (it has flaws but the community is large so finding answers for random errors is easy). it comes with prepackaged services and software to get your site going almost out of the box.

Secure it with firewall (ie UFW) and fail2ban

Get a domain name (a few bucks a year)

Configure your Apache, nginx or whatever
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Windows Script/Program Send Email in the future by breakabond - Wed, 15 Feb 2017 06:36:51 EST ID:1joa5uVv No.36508 Ignore Report Reply Quick Reply
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I want to remind myself of something in X days, so

What do you recommend for easily working with some sort of email API where I can run a program, and idk, something like this (please critique)

check_interval = 5 minutes // or longer depending on sys resources
if current_date == reminder_date
send email to self && delete reminder
Martin Firrychedging - Wed, 15 Feb 2017 14:24:01 EST ID:YL0YFsWq No.36509 Ignore Report Quick Reply
I don't know about sending the email (maybe you could write a macro in VBA?), but you could set a timer with the Windows Task Scheduler if you're on Windows. Of course it will only run if your PC is on though.
Fuck Gimblehot - Thu, 16 Feb 2017 23:11:04 EST ID:nUiSQX6z No.36511 Ignore Report Quick Reply
Fuck all that shit nigga do it on linux and write a cron script that cats a file and pipes it to mailx.
Ernest Hillykore - Fri, 17 Feb 2017 00:45:14 EST ID:j+2UyEq8 No.36512 Ignore Report Quick Reply
For sending a mail:




If you can hack this you are a wizard by Augustus Wemblelock - Fri, 10 Feb 2017 11:24:20 EST ID:RhO2TfLd No.36500 Ignore Report Reply Quick Reply
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I'm trying to submit an Instagram comment on an image from the browser - i'm finding it fucking impossible, though it really shouldn't be.

Getting the text in the input is fine, its just then dynamically submitting the comment (like when you press return).

Shiiiiiiiit if someone can do this...you will be my hero.
Fuck Wenkinwodging - Sat, 11 Feb 2017 03:52:13 EST ID:cpPd0VLJ No.36501 Ignore Report Quick Reply
Instagram supports an API that anybody can register to use:

UNIX Based Operating System For the People by Hugh Gozzleford - Sat, 28 Jan 2017 01:15:33 EST ID:STgZO5Su No.36481 Ignore Report Reply Quick Reply
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I basically want to create an Operating System that has all the benefits of Windows, and all the polish and "security" Macintosh OS X. I figured that I would start with the UNIX/LINUX kernel and build from there.

How hard would that be to accomplish. I mean there are a lot of Linux distributions out there. If I had ten people to work with me how long would it take to have a alpha version of my Operating System ready that is compatible with most if not all commonly used hardware.

I know that Android OS, OS X,and iOS are all built on UNIX. In addition to all Linux distributions.
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Charlotte Bemmleville - Sat, 28 Jan 2017 22:30:12 EST ID:HCDf7IMS No.36490 Ignore Report Quick Reply
What kind of experience do you have in development at this point? Do you have a lot of money (like millions of dollars) to spend on this? I applaud your enthusiasm but you do seem very new and I am skeptical of your ability to make this happen. If you do have a lot of money, please consider using it to advance existing FOSS projects.
Graham Pepperford - Sun, 29 Jan 2017 07:13:55 EST ID:9QSfnS0r No.36492 Ignore Report Quick Reply
>I'm a venture capitalist.
>I'm Just an idea guy.
>I post on an druggie image boards obscure programming forum.
>Nothing to do with actual programming.

right, get out.
Nigel Sumbleset - Sun, 29 Jan 2017 11:38:21 EST ID:5vr1L8pL No.36493 Ignore Report Quick Reply
I do what I please.
Hamilton Pockdock - Wed, 01 Feb 2017 19:42:53 EST ID:FgGq0PB+ No.36496 Ignore Report Quick Reply
Yea if you had attended some classes in college you would learn that you can't just throw around the "support" word and think it means something. "Support VR", "support hardware component X", "Support software Y" is stuff that concerns a OS only partly.

For instance, let's take the easiest to understand example: don't you think that IF it was possible, ALL Linux distributions and even MAC OS and Android devices would support running EXE files natively? That is not the case because Windows and every other OS is different in its architecture (before you ask, there is a project on Linux to make Windows code run natively -not with a compatibility layer like Wine-, but it's mostly abandoned because it was very difficult to develop), how it handles memory, syscalls, I/O and everything; also notice how you can't run most Linux programs on android because they differ in how the system is implemented.

But that is not the only thing that matters. Say you build YET ANOTHER operating system (it hasn't been done before, the internet is full of OS's that have been started and abandoned), maybe based on Unix (provided you know what that means), or maybe to accomplish all the great things you want to, you write a WHOLE another OS. It is never going to grow as fast as Windows did in its own time. That is because in the past there were not many operating system and windows basically the only one competing. PLUS they did a lot of shady shit for marketing for which they also got sued.

Basically you talk like a fag and your shit is all retarded; get out of here and stop wanting to waste people's time to "build" ideas that even you don't know specifically. Programming is not an aproximation. It is not a book, or a movie, or a play, where you can give the "general ideas" and then go on from there. Doing that can be beautiful in art, but software development? Computers do exactly what you tell them to do, and to do that, you need to KNOW EXACTLY what you want them to do.

My advice is get your nose into 3-4 books about OS development and computer architecture just to start, because that is the VERY LEAST you can …
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Nigel Warringlit - Fri, 03 Feb 2017 22:33:09 EST ID:e7bTcYy7 No.36499 Ignore Report Quick Reply
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> I would start open source with my distro and try to build our own unique programs with more powerful features. If the user base for my distro grows enough then companies like Adobe and Microsoft may begin to add support. Or we could program a runtime environment like wineskin that allows more seemless useage of Windows and even Apple programs.
So basically you want to be a shittier version of Canonical? I don't think you understand at all. Thousands of people are slowly building everything you already described for free except this:
>and try to build our own unique programs with more powerful features
Because anyone who does this will get boycotted by the open source community for being capitalist scum. I know you're market is the general consumer but quite often the moment they touch open source shit they stick with it.

Learning post code academy by Archie Craffingback - Wed, 11 Jan 2017 20:20:36 EST ID:AtsFlC7n No.36450 Ignore Report Reply Quick Reply
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Looking for something to do after code academy

Can't find anything.

I just finished the lessons of Javascript, Python. Should I learn another before moving on?

what do I move onto?

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Simon Greenville - Thu, 19 Jan 2017 00:04:41 EST ID:W/zS63TD No.36473 Ignore Report Quick Reply
I think it'd be better to learn the more modern problem solving methods, then only after that, maybe learn C to understand how it's happening behind the scenes.
Fucking Suzzlebanks - Fri, 20 Jan 2017 03:44:22 EST ID:AtsFlC7n No.36475 Ignore Report Quick Reply
besides algorithmic theory, Ive done a good part of that already

I like the delve into whatever

every CS person loves helping me, its neat
Fucking Suzzlebanks - Fri, 20 Jan 2017 03:45:45 EST ID:AtsFlC7n No.36476 Ignore Report Quick Reply
I enjoy it because its like a puzzle
and its more engaging than doing suduko everyday

I am replacing physical puzzles with this because its a skill that may or may not make me feel less lame for wearing two nintendo powergloves while blasting new wave retro wearing ray bans
Charlotte Crullerfuck - Sat, 21 Jan 2017 14:42:03 EST ID:sGFR0zid No.36479 Ignore Report Quick Reply

If your goal is just to challenge yourself, and you want to explore algorithms, I really recommend codingame.com . There is a large set of challenges that range from straightforward to extremely difficult, and there are also open-ended challenges like designing AIs to beat other AIs in races. And then every few months they have online hackathon type events.
Henry Clibblehall - Mon, 23 Jan 2017 19:44:33 EST ID:AtsFlC7n No.36480 Ignore Report Quick Reply
that sounds fun, thanks

silly java question by Nicholas Pondleman - Wed, 18 Jan 2017 04:54:58 EST ID:zKC23xNi No.36465 Ignore Report Reply Quick Reply
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Hi sorry if the question may sound dumb but i must do a for each in a class, with an arraylist which is placed in another class and i am unable to do that because it seems that arraylists are visible only in their class and if i do a get method i can't do the for each
thanks in advance
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Esther Brookham - Wed, 18 Jan 2017 12:09:00 EST ID:sGFR0zid No.36470 Ignore Report Quick Reply

Note this is a horrible practice but if you want direct access to the instance variables from different classes (not subclasses) you only get it with public access modifiers.
Shit Maffingteck - Wed, 18 Jan 2017 16:45:54 EST ID:9QSfnS0r No.36471 Ignore Report Quick Reply
This entirely depends on preference and/or the language you're programming in.
If it's necessary to observe some state of your object that can not be changed in the same manner it's fine imho.
Shit Maffingteck - Wed, 18 Jan 2017 16:56:18 EST ID:9QSfnS0r No.36472 Ignore Report Quick Reply
s/can not be changed/can be changed/
Charles Blazzlekotch - Thu, 19 Jan 2017 17:10:57 EST ID:VE+xmvqo No.36474 Ignore Report Quick Reply
You type like a fag and your shit's all unix.
Charlotte Crullerfuck - Sat, 21 Jan 2017 14:38:35 EST ID:sGFR0zid No.36478 Ignore Report Quick Reply

This is a Java thread, we're only talking about Java.

Help me with Java by Albert Focklewill - Wed, 11 Jan 2017 08:49:00 EST ID:VyheDnFA No.36448 Ignore Report Reply Quick Reply
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I must learn java and i study it since october but i really didn't understand much
i have some skills with assembly (IJVM) and C but i find Java really hard
do you have any tips or books to suggest me?
Hedda Dundlepan - Wed, 11 Jan 2017 14:45:20 EST ID:sGFR0zid No.36449 Ignore Report Quick Reply
If you want an "intro to programming book that is also a good introduction to Java" you could try "Java: An Introduction to Problem Solving and Programming," which was not bad except for the dozens of weird typos my copy had. If you want a "I am already decent at programming and I want something that talks to me at my level" book, I'd suggest "Core Java."
Lydia Blythebanks - Sat, 21 Jan 2017 11:36:47 EST ID:QFj3NJQM No.36477 Ignore Report Quick Reply
Create an Android app, doesn't matter if idea exists already. I recommend gang of four design patterns book.
Cyril Dartfuck - Thu, 02 Mar 2017 23:01:48 EST ID:vJcy7jWV No.36584 Ignore Report Quick Reply
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Thanks for the Core Java recommendation, took a bit of searching to find the right one but it's exactly was I looking for.
nb 'cause I'm new here and unsure what warrants a bump.

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