The Big Programming Thread - Page 794

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Thread Rules
1. This is not a "do my homework for me" thread. If you have specific questions, ask, but don't post an assignment or homework problem and expect an exact solution.
2. No recruiting for your cockamamie projects (you won't replace facebook with 3 dudes you found on the internet and $20)
3. If you can't articulate why a language is bad, don't start slinging shit about it. Just remember that nothing is worse than making CSS IE6 compatible.
4. Use [code] tags to format code blocks.

Chocolate

United States2350 Posts

November 06 2016 23:58 GMT

#15861

I find python to be best for competitive programming because its default collections are super easy to use. Case in point, you can implement a priority queue as just a wrapper around a built-in min-heap. Yeah you get a bit of a performance penalty due to interpreting but I find that tradeoff ok because I'm personally much more likely to come up with an e.g. O(nlogn) solution instead of an O(n^2) one in Python, which is more important

slmw

Finland233 Posts

November 07 2016 05:42 GMT

#15862

I don't think the choice of a programming language should matter at all when designing a solution on an abstract level. It sounds quite absurd to me that you'd have an easier time to come up with more efficient algorithms or data structures with Python if you're familiar with both C++ and Python. Obviously, if you're more familiar with one language it's probably easier to implement algorithms in that language. The performance difference is definitely significant if you're actually trying to compete.

Chocolate

United States2350 Posts

November 07 2016 07:03 GMT

#15863

When you're competing you are also graded on time at which you come up with a solution and overall have a max time limit, I think actually writing an efficient solution in python is a lot faster than in c++ (where I'd be more tempted to use a "dumber" algorithm to not mess with the STL), but that could just be me.

Manit0u

Poland17847 Posts

November 07 2016 09:34 GMT

#15864

I need a bit of help with sysadmin stuff...

System: Ubuntu 14.04
Problem: I have a load balancer working on port 11223 but it won't accept connections from outside of the system (curl localthost:11223/url works fine, trying it from another computer in the network does not).

I've tried 2 things:


$sudo iptables -I INPUT -p tcp -s 0.0.0.0/0 --dport 11223 -j ACCEPT
$sudo ufw allow 11223

Some outputs:


netstat:
tcp        0      0 127.0.0.1:11223         0.0.0.0:*               LISTEN

nmap:
Host is up (0.000045s latency).
PORT      STATE  SERVICE
11223/tcp closed unknown

iptables:
Chain INPUT (policy ACCEPT)
target     prot opt source               destination         
ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:11223

How can I open this port to public?

Nesserev

Belgium2760 Posts

November 07 2016 10:16 GMT

#15865

--- Nuked ---

Manit0u

Poland17847 Posts

November 07 2016 10:40 GMT

#15866

Yeah, just found out that in the load balancer config it was bound to 127.0.0.1 instead of public IP. Changing the config and restarting it solved the problem.

phar

United States1080 Posts

November 07 2016 17:33 GMT

#15867

Most (big name) programming competitions don't allow use of Python. It's generally C, C++, maybe Java. There are some exceptions.

But yea if it's allowed, and you don't think you can get to better algorithms in a faster language, Python will do you better. You'll get smoked by any team that has a math person doing the algorithms and someone with a strong grasp of C++ by virtue of Python being slow AF.

RainWhisper

United Arab Emirates333 Posts

November 08 2016 07:08 GMT

#15868

Hey All,

This is not so much a programming question but sort of relates to it.

I used to have a software saved folders in

c:\John Doe\Documents\folder 1
c:\John Doe\Documents\folder 2
c:\John Doe\Documents\folder 3

my new software now wants these items to be in

c:\John Doe\Documents\Personal\folder 1
c:\John Doe\Documents\Personal\folder 2
c:\John Doe\Documents\Personal\folder 3

This is the case for about a thousand folders. I tried searching online for tools but most of them are for bulk renaming not bulk moving.

I was wondering if anyone knows of any specific software to do so or if anyone has any script they have used before to do such a thing.

Thanks

Sorry if its the wrong threat, seemed most relevant to programming to me i guess.

Nesserev

Belgium2760 Posts

November 08 2016 07:34 GMT

#15869

--- Nuked ---

RainWhisper

United Arab Emirates333 Posts

November 08 2016 07:51 GMT

#15870

On November 08 2016 16:34 Nesserev wrote:

Show nested quote +

Is your example representative of your problem, because, if so, you could just use copy paste.

If you mean manually copy paste. I have about 4,000 Root Folders - with about 20 folders in each. That would easily take 3-5 hours - with the possibility of a few mistakes.

Acrofales

Spain18451 Posts

November 08 2016 08:00 GMT

#15871

On November 08 2016 16:51 MarwanBaki wrote:

Show nested quote +

If you mean manually copy paste. I have about 4,000 Root Folders - with about 20 folders in each. That would easily take 3-5 hours - with the possibility of a few mistakes.

Still confused. What's wrong with cntrl-a cntrl-x, make new folder, cntrl-v. Wait for 4000 folders to be moved. In NTFS or ext2/3/4 this should be a few seconds at most. Other file systems may require longer.

TBO

Germany1350 Posts

November 08 2016 08:20 GMT

#15872

he can't paste all 4000 at once because he needs to put them not in 1 new folder but in 4000 new ones. I didn't find any premade solution for his problem, should be easy enough to program though. On the other hand before doing that you should check if you can not just change some setting in teh program to have it accept your old folder layout (or maybe it is in an environment variable? Writing a short mail to their support also might help.

mantequilla

Turkey781 Posts

November 08 2016 08:44 GMT

#15873

c:\John Doe\Documents\folder 1
c:\John Doe\Documents\folder 2
c:\John Doe\Documents\folder 3

c:\John Doe\Documents\Personal\folder 1
c:\John Doe\Documents\Personal\folder 2
c:\John Doe\Documents\Personal\folder 3

where're the 4000 new ones? it looks like everything inside Documents just moved into Personal folder.

Silvanel

Poland4769 Posts

November 08 2016 09:06 GMT

#15874

On November 08 2016 16:08 MarwanBaki wrote:
Hey All,

This is not so much a programming question but sort of relates to it.

I used to have a software saved folders in

c:\John Doe\Documents\folder 1
c:\John Doe\Documents\folder 2
c:\John Doe\Documents\folder 3

my new software now wants these items to be in

c:\John Doe\Documents\Personal\folder 1
c:\John Doe\Documents\Personal\folder 2
c:\John Doe\Documents\Personal\folder 3

This is the case for about a thousand folders. I tried searching online for tools but most of them are for bulk renaming not bulk moving.

I was wondering if anyone knows of any specific software to do so or if anyone has any script they have used before to do such a thing.

Thanks

Sorry if its the wrong threat, seemed most relevant to programming to me i guess.

robocopy
or just write script for this.

TBO

Germany1350 Posts

November 08 2016 09:37 GMT

#15875

On November 08 2016 17:44 mantequilla wrote:
c:\John Doe\Documents\folder 1
c:\John Doe\Documents\folder 2
c:\John Doe\Documents\folder 3

c:\John Doe\Documents\Personal\folder 1
c:\John Doe\Documents\Personal\folder 2
c:\John Doe\Documents\Personal\folder 3

where're the 4000 new ones? it looks like everything inside Documents just moved into Personal folder.

ah right my bad, didn't think correctly.

[deleted unrelated question , because found out I am stupid]

BisuDagger

Bisutopia19391 Posts

November 08 2016 15:13 GMT

#15876

Sorry if its the wrong threat, seemed most relevant to programming to me i guess.

A bat file can work. I use something similar when making builds for my simulations. This is a sample of me first deleting items from a directory and then moving new ones in there from another directory.


rd /s /q "C:\Program Files (x86)\FolderA\Build\testBuild_Data"
rd /s /q "C:\Program Files (x86)\FolderA\Build\testBuild.exe"
MOVE "C:\Users\username\Documents\FolderB\Build\testBuild_Data" "C:\Program Files (x86)\FolderA\Build\"
MOVE "C:\Users\username\Documents\FolderB\Build\testBuild.exe" "C:\Program Files (x86)\FolderA\Build\"

RainWhisper

United Arab Emirates333 Posts

November 08 2016 19:56 GMT

#15877

On November 09 2016 00:13 BisuDagger wrote:

Show nested quote +


rd /s /q "C:\Program Files (x86)\FolderA\Build\testBuild_Data"
rd /s /q "C:\Program Files (x86)\FolderA\Build\testBuild.exe"
MOVE "C:\Users\username\Documents\FolderB\Build\testBuild_Data" "C:\Program Files (x86)\FolderA\Build\"
MOVE "C:\Users\username\Documents\FolderB\Build\testBuild.exe" "C:\Program Files (x86)\FolderA\Build\"

Oh boy - I guess its time i learn how to make bat files

Thanks alot.

AS far as the other comments - im not sure if i was clear enough so im going to give you the exact example just for kicks.

c:\data\employees\1\bloodreport\bloodreport.pdf
c:\data\employees\1\fitness\fitness.pdf
c:\data\employees\1\mri\mri.pdf

c:\data\employees\2\bloodreport\bloodreport.pdf
c:\data\employees\2\fitness\fitness.pdf
c:\data\employees\2\mri\mri.pdf

Where 2 is the id of the employee.

The new system wants the data in

c:\data\employees\1\Medical Tests\bloodreport\bloodreport.pdf
c:\data\employees\1\Medical Tests\fitness\fitness.pdf
c:\data\employees\1\Medical Tests\mri\mri.pdf

c:\data\employees\2\Medical Tests\bloodreport\bloodreport.pdf
c:\data\employees\2\Medical Tests\fitness\fitness.pdf
c:\data\employees\2\Medical Tests\mri\mri.pdf

And i have around 4,000 employees.

So i can't go into each folder and create a new folder then ctrl a ctrl x ctrl v

mantequilla

Turkey781 Posts

November 08 2016 21:26 GMT

#15878

problem with bat files is if you get it wrong in the first run and directories get messed up, it will be a lot more pain to sort them out. and backing up 4k folders full of files is not easy too.

copy a few of it to somewhere else, test your script there 5-10 times, until you are sure it works correctly, then back up your 4k folders to somewhere then shoot

Manit0u

Poland17847 Posts

November 09 2016 07:09 GMT

#15879

On November 09 2016 04:56 MarwanBaki wrote:

Show nested quote +

On November 09 2016 00:13 BisuDagger wrote:

Sorry if its the wrong threat, seemed most relevant to programming to me i guess.


rd /s /q "C:\Program Files (x86)\FolderA\Build\testBuild_Data"
rd /s /q "C:\Program Files (x86)\FolderA\Build\testBuild.exe"
MOVE "C:\Users\username\Documents\FolderB\Build\testBuild_Data" "C:\Program Files (x86)\FolderA\Build\"
MOVE "C:\Users\username\Documents\FolderB\Build\testBuild.exe" "C:\Program Files (x86)\FolderA\Build\"

Oh boy - I guess its time i learn how to make bat files

Wait... Is there no settings in the system to set up the pick-up directory paths?

Anyway, since it's just a simple matter of changing /2/bloodreport/ to /2/Medical Tests/bloodreport/ I'd just write some php/python/ruby/whatever script and do it with it.

Or you could do it on Linux without much hassle.

Djagulingu

Germany3605 Posts

November 09 2016 13:15 GMT

#15880

Dear Django,

Can you be less opinionated pls? Kthx.

Sincerely.

P.S: I still like you.

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