The 2nd Monitor

Mast

20:01

55

score

10

10 examples

Introduction to Python

36

Hello, World

10

Creating Variables

31 contributors

edited 1 hour ago

jerli

754

I didn't see a share link, but you can simply copy the first part of whatever thing you're on at the moment and drop that in chat.

Quill

@Phrancis that guy looks familiar

Phrancis

@Quill Must be the hat

Captain Obvious

0

Q: python script to calculate the interval between 2 consecutive packets

class FlowDict(object): def __init__(self): self.TCPactiveFlow = dict() self.TCPcompleteFlow = list() self.UDPactiveFlow = dict() self.UDPcompleteFlow = list() self.currenttime = -1 self.lastupdate = -1 self.difference = self.currenttime - self.lastupdate self.th...

python

Mast

Welcome to Code Review! As it currently stands, this is a code dump. What is your intention with the code? Does it work as expected? What are your concerns? Are there any other things we should keep in mind? — Mast 20 secs ago

RoboSanta

Naruto answer; accepted non-selfie answer with 0 score: Sidebar menu to hide or expand parts of a form javascript jquery html comparative-review form

Ripe zombie; open question with answers, at least one answer having score 0, no answer having score > 0: Using Rails concerns for validation in models beginner ruby ruby-on-rails validation meta-programming

Quill

20:24

@DanPantry:

Preview of async/await working in Chrome. 👍 for code that looks sync on the surface but is async under the hood 🔥 https://t.co/s0BfEIxsJ0

Tweeted by addyosmani on July 21, 2016 at 7:11 PM

Dan Pantry

20:44

@Quill oh damn

syb0rg

@Mast stackoverflow.com/documentation/c?tab=proposedchanges

The two that are mine, if you still have them

Mast

@syb0rg Fixed.

syb0rg

Thanks!

Quill

let's try and avoid creating some documentation review ring here, okay :)

syb0rg

@Quill We are Code Review... ;)

2

Quill

20:54

wait.... this isn't the pub.

Mast

Exactly. I know which regulars are proficient in which languages.

Bernard Meurer

Halp

I haz c++ question

Mast

So I can see with a quick skim whether it's decent or not.

Bernard Meurer

no une anzer me

halp

syb0rg

TTQW, early weekend for me too. Have a good weekend everyone!

Mast

20:55

@BernardMeurer Go Python. Win.

Did that zolve problem?

Bernard Meurer

If my code loads a couple of XML files (OpenCV cascades) is there a way to embed them onto the compiled bytecode so I don't need separate files all the time?

@Mast I need low level magic :)

Mast

You want to do what? On what?

Bernard Meurer

C++

Mast

Yea, I know.

What are you using the XML for?

And how do you want to embed it on bytecode?

Bernard Meurer

It's the format for Cascades for OpenCV feature detection with classifiers

Mast

20:57

Ok, sounds familiar.

Oh, you want to embed the classifier into your compiled program?

Bernard Meurer

Idk, I just want to not need the things to be in separate files to the executable

the Cascade file

Mast

Create an object which fits the entire file. Load the file during compilation. Make the program reference the object instead of the file.

I'd assume such a class already exists in the OpenCV, don't ask me which.

You could even hardcode the XML into the object in a .hpp file.

I'm not saying it's good, but it works.

Bernard Meurer

I asked on the OpenCV irc, but the sweet people who always help me aren't on apparently

Mast

OpencvClassifierHoldingClass myHolder;
myHolder = <XML HERE>

Bernard Meurer

Wait, wait, I'm stupid let me process

2

I'm basically a Pentium III

2

with 1GB of DDR ram

Mast

21:01

tries not to star above statements

Bernard Meurer

and an AGP-based GPU

Star away, I take pride in that :v

@Mast But then how'd I load the XML like I'm doing in faceCascade.load("cascades/frontal_face.xml");

I'm an AI experiment from the 90's that went wrong

Mast

@BernardMeurer Is that a stand-alone function or is it assigned to a variable?

Bernard Meurer

@Mast Standalone, that's the whole like there, after that the CascadeClassifier faceCascade will have loaded that cascade file

Mast

In other words: where does it return to?

Bernard Meurer

Can you do multiline code here? Like 4 lines?

Mast

21:06

Here
Be
Many
Code

pacmaninbw

Paste it

Mast

Paste and hit 'fixed font' to the right if it doesn't auto indent correctly.

Bernard Meurer

CascadeClassifier faceCascade;
CascadeClassifier smileCascade;
faceCascade.load("cascades/frontal_face.xml");
smileCascade.load("cascades/smile.xml");

Mast

Ah yes, the joy of OpenCV...

Bernard Meurer

There, that's everything in this code that involves static outside files

Actually, I'm not even using the nose one anymore

pacmaninbw

21:08

Ah optimization at work

Bernard Meurer

There, that's it

Mast

I'd take a chunk from the load function and re-write the required part into it. But that would involve modifying the library, which would be bad.

Bernard Meurer

@Mast Yeah I want to avoid that if possible :v

I have a talent for breaking everything I touch

Mast

In JavaScript one would simply extent the class a bit and get it over with...

Bernard Meurer

Lame

Where's the fun if solving your problem doesn't include crying

skiwi

21:10

28 degrees in my room, help :|

(Celsius, not Fahrenheit)

Bernard Meurer

@skiwi I get 50 here during summer, toughen up

(40 is far more common though)

Yes, Celsius

@Mast no ideas?

Captain Obvious

0

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Q: K&R C - print horizontal histogram of the length of words in input

I'm reading K&R C book, and I did exercise 1-13. I want to know how to improve this code, and also, would it be better to use arrays to do this? Because the book chapter is about arrays, and I didn't use them. #include <stdio.h> ...

c

Mast

@BernardMeurer I'm thinking.

Bernard Meurer

@Mast Ah, I've heard of that before, complex art

Mast

If the part where the classifier stores it's data is Public, it's doable.

Otherwise, you're literally working against the language.

You're not supposed to be able to get the data in there directly.

Bernard Meurer

21:15

@Mast le docs

I'm reading

Mast

Can a FileNode be an object?

Bernard Meurer

@Mast It's public!

@Mast What's that?

Mast

@BernardMeurer There you go. Just write a custom function duplicating the logic from load but from a variable instead of a file. Make the variable a const in a header somewhere and you're set.

pacmaninbw

@skiwi It's only 24 Celsius here, but I live along the coast, supposed to be about 35 inland.

Bernard Meurer

@Mast But the logic inside load is absolutely bizarre

Mast

21:18

@BernardMeurer FileNode

@BernardMeurer Yes, it's probably optimized into unreadability.

Bernard Meurer

@Mast CV_WRAP bool load( const String& filename );

if I GOTO definition that's all there is there

Mast

> File Storage Node class.

The node is used to store each and every element of the file storage opened for reading. When XML/YAML file is read, it is first parsed and stored in the memory as a hierarchical collection of nodes. Each node can be a “leaf” that is contain a single number or a string, or be a collection of other nodes. There can be named collections (mappings) where each element has a name and it is accessed by a name, and ordered collections (sequences) where elements do not have names but rather accessed by index. Type of the file node can be determined using FileNode::type m…

Bernard Meurer

@note The file may contain a new cascade classifier (trained traincascade application) only.
 */
CV_WRAP bool read( const FileNode& node );

I guess read can receive a fileNode!

Mast

read does, load doesn't. But the result is pretty much the same by the looks of it.

Bernard Meurer

But what does that does for me? I mean, the filenode will still need to read the files right?

Mast

21:30

Unless you can initialize the data it holds in another method, yes.

But as you said, it's stored publicly. So simply write your own load function and you should be good to go.

Since it happens all at compile time, it's not a problem for the end-user if it isn't the fastest.

Just write it, post it at Code Review and optimize it :-)

Bernard Meurer

@Mast Currently I can't even find how they load their stuff

Mast

@BernardMeurer Do you have a debugger available?

Bernard Meurer

@Mast GDB and valgrind

and I'm using Clion as an IDE

@Mast How the hell are they loading anything

Mast

@BernardMeurer 220 and down.

Bernard Meurer

@Mast Yeah, 239

but still that doesn't seem to really do anything

the actual function must be somewhere else

@Mast AHA

Wait, aha?

Mast

21:40

892 and 897 look like they do something relevant.

Bernard Meurer

@Mast If I try and create my own load I can't reference the variables they do in their code :/

as in oldCascade.release();

Mast

@BernardMeurer Those aren't public?

If they are, there's a way.

Bernard Meurer

@Mast Ayayay this thing is being too much of a pain in my butt

Mast

OpenCV usually is.

It's a great concept, but the entire library is filled with constructs which are odd at best and impossible to understand at worst.

Captain Obvious

0

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Bernard Meurer

21:55

@Mast Yeah their constructs are obscure

@Mast Thanks a lot for the help though :)

Vogel612

Remonking

Mast

@BernardMeurer Np

@Vogel612 Remonking @Vogel612

Duga

[marcandregirard/javaenv] marcandregirard created repository

Captain Obvious

22:15

0

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Duga

22:30

This question is more appropiate for codereview.stackexchange.com — yuriy636 10 secs ago

Captain Obvious

0

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Duga

For questions about optimising code that already works, you might want to ask on codereview.se. However, I encourage you to read this first. — bcsb1001 47 secs ago

syb0rg

22:56

I leave the documentation for 2 hours and all these people made bad edits

UGH

Vogel612

@syb0rg ^^ that .. so much

Java has topic requests for the builder pattern, because that's obviously only a java thing and no other language could ever have it

syb0rg

People with too low of rep are changing things they don't understand and they have the power to do it

Vogel612

it will take months to clean this mess up

syb0rg

I lost my power for the day trying to keep up with them

Why can a guy with 178 rep approve a massive edit in one go?!

WTH

I managed to submit a rollback to a good version: stackoverflow.com/documentation/proposed/changes/22566

Duga

possible answer invalidation by speedycorndog on question by speedycorndog: codereview.stackexchange.com/posts/135543/revisions

Captain Obvious

23:38

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Introduction to Python

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