Coding: Fleeting Thoughts

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Re: Coding: Fleeting Thoughts

Postby headprogrammingczar » Thu Mar 04, 2010 2:56 pm UTC

Project Euler isn't just a computational challenge. I've solved a few problems algebraically. Whatever way works, as long as you don't brutefoce it (although if you can beat the CAPCHA and generate answers fast enough, you probably earned those points).
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Re: Coding: Fleeting Thoughts

Postby jaap » Thu Mar 04, 2010 4:14 pm UTC

headprogrammingczar wrote:Project Euler isn't just a computational challenge. I've solved a few problems algebraically. Whatever way works, as long as you don't brutefoce it (although if you can beat the CAPCHA and generate answers fast enough, you probably earned those points).

You have to leave at least 30 seconds between submitting answers.
Anyway, I would consider it cheating unless he then confirmed the answer really was correct by calculating the periods of the three decimal expansions he had to try.

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Re: Coding: Fleeting Thoughts

Postby Berengal » Thu Mar 04, 2010 5:49 pm UTC

It was an educated guess. Any guess, when sufficently educated, is indistinguishable from a real solution.
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Re: Coding: Fleeting Thoughts

Postby TheChewanater » Thu Mar 04, 2010 5:58 pm UTC

jaap wrote:
headprogrammingczar wrote:Project Euler isn't just a computational challenge. I've solved a few problems algebraically. Whatever way works, as long as you don't brutefoce it (although if you can beat the CAPCHA and generate answers fast enough, you probably earned those points).

You have to leave at least 30 seconds between submitting answers.
Anyway, I would consider it cheating unless he then confirmed the answer really was correct by calculating the periods of the three decimal expansions he had to try.

Brute force their SFTP (or FTP or Telnet or whatever) password and get onto their servers. Then, remove the script that prevents you from answering too quickly so you can brute force every problem. Only then do you deserve the points.

If you expected me to say you modify their database so you have every problem done, you are not worthy of getting the points for the questions.
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Re: Coding: Fleeting Thoughts

Postby You, sir, name? » Thu Mar 04, 2010 6:05 pm UTC

Berengal wrote:It was an educated guess. Any guess, when sufficently educated, is indistinguishable from a real solution.


"Guess" sounds so crude. Call it an "ansatz" instead.
I edit my posts a lot and sometimes the words wrong order words appear in sentences get messed up.

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Re: Coding: Fleeting Thoughts

Postby TheChewanater » Thu Mar 04, 2010 7:21 pm UTC

You, sir, name? wrote:
Berengal wrote:It was an educated guess. Any guess, when sufficently educated, is indistinguishable from a real solution.


"Guess" sounds so crude. Call it an "ansatz" instead.

You know, I'm sure the processes in your brain that are involved in guessing are far more advanced than the normal Eular answers.

Say you used the world's most advanced "genetic" algorithm. :D
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Re: Coding: Fleeting Thoughts

Postby You, sir, name? » Thu Mar 04, 2010 7:30 pm UTC

TheChewanater wrote:
You, sir, name? wrote:
Berengal wrote:It was an educated guess. Any guess, when sufficently educated, is indistinguishable from a real solution.


"Guess" sounds so crude. Call it an "ansatz" instead.

You know, I'm sure the processes in your brain that are involved in guessing are far more advanced than the normal Eular answers.

Say you used the world's most advanced "genetic" algorithm. :D


Though it took 3.7 or so billion years for the algorithm to learn to solve the problem (so slow it rivals java VMs from the '90s), so in that sense, it really doesn't qualify under the Euler rules.
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Re: Coding: Fleeting Thoughts

Postby TheChewanater » Thu Mar 04, 2010 7:47 pm UTC

You, sir, name? wrote:Though it took 3.7 or so billion years for the algorithm to learn to solve the problem (so slow it rivals java VMs from the '90s), so in that sense, it really doesn't qualify under the Euler rules.

It has also taken decades to develop the hardware and software that can solve the problems, but the answers can be found in under a minute.

From the Project Eular website:
...although it may take several hours to design a successful algorithm with more difficult problems, an efficient implementation will allow a solution to be obtained on a modestly powered computer in less than one minute.


The meaning of "several" is up for debate. Also, notice the "may" and "more difficult".
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Re: Coding: Fleeting Thoughts

Postby e^iπ+1=0 » Fri Mar 05, 2010 12:33 am UTC

jaap wrote:
headprogrammingczar wrote:Project Euler isn't just a computational challenge. I've solved a few problems algebraically. Whatever way works, as long as you don't brutefoce it (although if you can beat the CAPCHA and generate answers fast enough, you probably earned those points).

You have to leave at least 30 seconds between submitting answers.
Anyway, I would consider it cheating unless he then confirmed the answer really was correct by calculating the periods of the three decimal expansions he had to try.

Well, Wolfram|Alpha can do it for me, but really I don't know how to solve that problem properly.
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Re: Coding: Fleeting Thoughts

Postby '; DROP DATABASE;-- » Fri Mar 05, 2010 6:46 am UTC

I am always amazed by my ability to misread code in the same way over and over, and then look again a few hours/days later and immediately notice the problem. Like reading this:

Code: Select all

glTexCoord2f(this->VtxCache[Command[i] >> 1].TextureCoordS / (float)(32 << this->Tile[0].SMask),
   this->VtxCache[Command[i] >> 1].TextureCoordT / (float)(32 << this->Tile[0].TMask));
as

Code: Select all

glTexCoord2f(this->VtxCache[Command[i] >> 1].TextureCoordS),
   this->VtxCache[Command[i] >> 1].TextureCoordT);
every time. I must have looked over that function 47 times wondering why the texture coordinates were wrong.
(yes that is old messy code being replaced with nice shiny new code.)
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Re: Coding: Fleeting Thoughts

Postby b.i.o » Fri Mar 05, 2010 7:06 am UTC

'; DROP DATABASE;-- wrote:(yes that is old messy code being replaced with nice shiny new code.)

...I sure hope so. That's disgusting.

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Re: Coding: Fleeting Thoughts

Postby Moo » Fri Mar 05, 2010 9:33 am UTC

Man, people at Google must all be super nice and all visit deserted puppies in their free time. I had no idea integrating Google Maps into a website was this easy!
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Re: Coding: Fleeting Thoughts

Postby RoadieRich » Fri Mar 05, 2010 2:35 pm UTC

Is there a type[class] in haskell - or some other way - that will allow the following to compile:

Code: Select all

collatz x | odd x = 3*x+1
          | otherwise x/2

If I use Integral, it complains about the /, if I use fractional, it complains about odd. It's the second time I've come across this problem.
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Re: Coding: Fleeting Thoughts

Postby hotaru » Fri Mar 05, 2010 2:47 pm UTC

RoadieRich wrote:Is there a type[class] in haskell - or some other way - that will allow the following to compile:

Code: Select all

collatz x | odd x = 3*x+1
          | otherwise x/2

If I use Integral, it complains about the /, if I use fractional, it complains about odd. It's the second time I've come across this problem.

try using `div` instead of /.
like this:

Code: Select all

collatz x | odd x     = 3 * x + 1
          | otherwise = x `div` 2

and then you can do this:

Code: Select all

takeWhile (1 /=) $ iterate collatz 670617279

Code: Select all

factorial product enumFromTo 1
isPrime n 
factorial (1) `mod== 1

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Re: Coding: Fleeting Thoughts

Postby Berengal » Fri Mar 05, 2010 5:04 pm UTC

Yeah, haskell separates different types of division, integer division, integer remainder and floating point division. I'm sort of ambivalent about this. It's nice to have all different divisions separate and to be made aware of them, but most of the time you just want to divide some effing numbers and it becomes a tiny bother to choose the right division function. The difference has been vital a couple of times though, and I'm sure I would've spent lots of time debugging in any other language without this difference, and finally I'd have to write whichever of the functions were missing anyway.
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Re: Coding: Fleeting Thoughts

Postby Xanthir » Fri Mar 05, 2010 9:20 pm UTC

Moo wrote:Man, people at Google must all be super nice and all visit deserted puppies in their free time. I had no idea integrating Google Maps into a website was this easy!

1. It is pretty fucking simple, isn't it? I love it.
2. I am a Google employee.
3. I visited a puppy today during lunch because he was lonely.
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Re: Coding: Fleeting Thoughts

Postby e^iπ+1=0 » Sun Mar 07, 2010 11:10 am UTC

Code: Select all

>>> invalid syntax
  File "<stdin>", line 1
    invalid syntax
                 ^
SyntaxError: invalid syntax
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Re: Coding: Fleeting Thoughts

Postby phlip » Mon Mar 08, 2010 1:10 am UTC

Blarg.

Dear coworker who seems to think he's the only one coding this project,
When you are making large-scale changes that require editing all the XML config files in the project, it's acceptable to use some form of automated tool to change all the XML files at once. However, it's considered good form to minimise the extent of the change... on the other hand, using a tool that involves parsing the XML, changing the DOM, and re-outputting the XML, resulting in re-indenting, re-wordwrapping, reordering attributes, replacing <foo /> with <foo/>, and the like, would be bad form. Especially when you have reason to believe that other people are working on those XML files too, and will get edit conflicts. And even more especially when your change is simply to add a single attribute to the root element.
If you just changed the one single line that you needed to change, then diff3 would've handled it automatically, but because you changed damn-near every line in the file, the merge tool is going to throw up its hands and go home.

I've just spent half an hour cleaning up SVN conflicts. And this isn't the first time.

Code: Select all

enum ಠ_ಠ {°□°╰=1, °Д°╰, ಠ益ಠ╰};
void ┻━┻︵​╰(ಠ_ಠ ⚠) {exit((int)⚠);}
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Re: Coding: Fleeting Thoughts

Postby Aaeriele » Mon Mar 08, 2010 3:17 am UTC

phlip wrote:Blarg.

Dear coworker who seems to think he's the only one coding this project,
When you are making large-scale changes that require editing all the XML config files in the project, it's acceptable to use some form of automated tool to change all the XML files at once. However, it's considered good form to minimise the extent of the change... on the other hand, using a tool that involves parsing the XML, changing the DOM, and re-outputting the XML, resulting in re-indenting, re-wordwrapping, reordering attributes, replacing <foo /> with <foo/>, and the like, would be bad form. Especially when you have reason to believe that other people are working on those XML files too, and will get edit conflicts. And even more especially when your change is simply to add a single attribute to the root element.
If you just changed the one single line that you needed to change, then diff3 would've handled it automatically, but because you changed damn-near every line in the file, the merge tool is going to throw up its hands and go home.

I've just spent half an hour cleaning up SVN conflicts. And this isn't the first time.

You poor thing. :( Maybe he doesn't know its happening?
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Re: Coding: Fleeting Thoughts

Postby You, sir, name? » Mon Mar 08, 2010 11:55 am UTC

1. Explain to him that what he's doing is causing problems
If it doesn't help
2. Complain with a supervisor or someone higher up in the pecking order
I edit my posts a lot and sometimes the words wrong order words appear in sentences get messed up.

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Re: Coding: Fleeting Thoughts

Postby Berengal » Mon Mar 08, 2010 1:51 pm UTC

You, sir, name? wrote:2. Complain with a supervisor or someone higher up in the pecking order
Alternative: Commit before he does.
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Re: Coding: Fleeting Thoughts

Postby TheChewanater » Mon Mar 08, 2010 9:56 pm UTC

This looks amazing, to say the least. I might try it sometime.

http://pyembedc.sourceforge.net/
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Re: Coding: Fleeting Thoughts

Postby levicc00123 » Mon Mar 08, 2010 10:30 pm UTC

TheChewanater wrote:This looks amazing, to say the least. I might try it sometime.

http://pyembedc.sourceforge.net/


[nerdgasm] This should be in the repository of every linux distribution if it's not already.[/nerdgasm]
Image

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Re: Coding: Fleeting Thoughts

Postby You, sir, name? » Mon Mar 08, 2010 10:36 pm UTC

I can't help but feel something downright gnarly must be going on under the hood to allow for that.
I edit my posts a lot and sometimes the words wrong order words appear in sentences get messed up.

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Re: Coding: Fleeting Thoughts

Postby Xeio » Mon Mar 08, 2010 10:55 pm UTC

You, sir, name? wrote:I can't help but feel something downright gnarly must be going on under the hood to allow for that.
The atrocities committed in the name of speed... Also, it can call back into python functions? I'm scared...

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Re: Coding: Fleeting Thoughts

Postby Aaeriele » Mon Mar 08, 2010 11:02 pm UTC

I don't even want to know what accessing Python vars with maps/dicts in them looks like.
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Re: Coding: Fleeting Thoughts

Postby Berengal » Mon Mar 08, 2010 11:12 pm UTC

Doesn't ruby have such a library as well?

It did recently get an inline Haskell library at least.
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Re: Coding: Fleeting Thoughts

Postby b.i.o » Mon Mar 08, 2010 11:37 pm UTC

Berengal wrote:Doesn't ruby have such a library as well?

Yes.

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Re: Coding: Fleeting Thoughts

Postby Rysto » Tue Mar 09, 2010 2:12 am UTC

Berengal wrote:Alternative: Commit before he does.

After making a whitespace change on every line.

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Re: Coding: Fleeting Thoughts

Postby Sc4Freak » Tue Mar 09, 2010 2:27 am UTC

Won't work. He'll just sync with the repository, and run his automated tool over it again, and won't notice the whitespace changes on every other line. :P

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Re: Coding: Fleeting Thoughts

Postby TheChewanater » Tue Mar 09, 2010 2:39 am UTC

Why are you telling us instead of him?
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Re: Coding: Fleeting Thoughts

Postby phlip » Tue Mar 09, 2010 2:40 am UTC

Well, I bitched at him about it (well, bitched politely) today, he said if/when it happens again, just go ahead and override it with my version, and tell him to run the script again.

Which is good enough, I think.

TheChewanater wrote:Why are you telling us instead of him?
Because there isn't a Coding rant thread.

Code: Select all

enum ಠ_ಠ {°□°╰=1, °Д°╰, ಠ益ಠ╰};
void ┻━┻︵​╰(ಠ_ಠ ⚠) {exit((int)⚠);}
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Re: Coding: Fleeting Thoughts

Postby TheChewanater » Tue Mar 09, 2010 3:39 am UTC

While writing to a textbook publisher to complain about their book on web design, I included this at the end of my citations.

Code: Select all

[[my name]]. My brain. May 1995.
<ftp://192.168.1.-1/public/>


I'm also tempted to put:

Code: Select all

You.  Your brain.  `time`.
</dev/null>


But I won't. :)
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Re: Coding: Fleeting Thoughts

Postby |Erasmus| » Tue Mar 09, 2010 10:14 pm UTC

phlip wrote:Well, I bitched at him about it (well, bitched politely) today, he said if/when it happens again, just go ahead and override it with my version, and tell him to run the script again.

Which is good enough, I think.

It will play havoc with revision logs though, won't it?

Like, make it impossible to see where any actual change was in both his change, and then your one which reverts it... :/

On another note, I want to kill a load of people at work this morning. Apparently it is a good idea to check a literal localised label string to check for a specific GUI element. This is after they decided to make it so these particular strings which are supposed to be localised, are not. At least the GM has already been told about that part, but relying on the fact they've already broken some things to make other things work is just silly.

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Re: Coding: Fleeting Thoughts

Postby elminster » Thu Mar 11, 2010 2:10 am UTC

I had someone overwrite a good portion of my 4 hours of continuous coding before, because he saw svn conflicts and thought it was too confusing, so just overwrote it all. In the process managing to undo several critical fixes that I had done. Later on we had people complaining about it and I was just like... *sigh*.
Now I just ask them to commit first and/or make sure they've not got a big bulk of things that will conflict before hand. Sometimes conflicts can be a a bit ambiguous when 2 people are working on the same part of code.
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Re: Coding: Fleeting Thoughts

Postby lulzfish » Thu Mar 11, 2010 2:49 am UTC

elminster wrote:I had someone overwrite a good portion of my 4 hours of continuous coding before, because he saw svn conflicts and thought it was too confusing, so just overwrote it all. In the process managing to undo several critical fixes that I had done. Later on we had people complaining about it and I was just like... *sigh*.
Now I just ask them to commit first and/or make sure they've not got a big bulk of things that will conflict before hand. Sometimes conflicts can be a a bit ambiguous when 2 people are working on the same part of code.

I've had a lot of times in git where I just said to myself, "I have no fucking clue... I'm starting over".
Appending to my "list of ways that my 4-year CS curriculum has left me disappoint:"
"Did not learn the first thing about source control / versioning"

I tried to learn git on my own, but I can't commit to reading the manuals, so I just commit things periodically and hope I don't do anything fancy enough to accidentally break something.

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Re: Coding: Fleeting Thoughts

Postby urobythos » Thu Mar 11, 2010 7:01 am UTC

counting on coding

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Re: Coding: Fleeting Thoughts

Postby You, sir, name? » Thu Mar 11, 2010 7:07 am UTC

urobythos wrote:counting on coding


find code/ | wc -l
I edit my posts a lot and sometimes the words wrong order words appear in sentences get messed up.

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Re: Coding: Fleeting Thoughts

Postby hotaru » Thu Mar 11, 2010 7:29 am UTC

hotaru wrote:

Code: Select all

collatz x | odd x     = 3 * x + 1
          | otherwise = x `div` 2

Code: Select all

collatz x = uncurry (!!) . first (:[3 * x + 1]) $ divMod x 2

for once i can use divMod and have code that's not a huge mess.

Code: Select all

factorial product enumFromTo 1
isPrime n 
factorial (1) `mod== 1

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Re: Coding: Fleeting Thoughts

Postby Moo » Thu Mar 11, 2010 7:52 am UTC

I'm starting a project for a mutual acquaintance and have NO idea what to charge, as I've only ever worked in the UK and not here in South Africa and haven't been back long enough to know what going rates are. Googling "web development cost (only pages from South Africa)" gets me as much variation as googling "hooker rates" would, I imagine. Sigh. Time to pull a figure out of the air and watch his face for signals.
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