The 2nd Monitor

rolfl

19:00

There is no possible subclass of yours which will work with that check in place.

Gemtastic

hello

rolfl

unless it returns a hard-coded iterator from somewhere that is not part of the constructor for the instance.

Something like:

Donald.McLean

@Gemtastic Greetings,

rolfl

public Iterator<...> readIterator() {
    return Collections.emptyList().iterator();
}

Gemtastic

Are you talking Java?

rolfl

19:02

apparently

Jeroen Vannevel

@Gemtastic Yes. It's horrible, isn't it?

skiwi

I'm confused yes, how will I even get this to work?

I don't want to pass the iterator from the top level (the non-library code)

Gemtastic

@JeroenVannevel It's not that bad. I don't really know any better though... Java is my first :P

Hosch250

Done. 96%

rolfl

@skiwi Oh, that's easy.....

Jeroen Vannevel

19:03

@Gemtastic I, too, was like you once. Do you have a moment spare to talk about our lord and savior, Microsoft?

rolfl

24 mins ago, by skiwi

public ListLogReader(final List<String> inputList, final EntryParsers entryParsers) {
    super(entryParsers);
    Objects.requireNonNull(inputList, "inputList");
    this.iterator = new ArrayList<>(inputList).iterator();
}

change it to:

Hosch250

@JeroenVannevel How would I create a singleton or whatever you called it to pass my values between my SettingsPane and my VM?

rolfl

super(entryParsers, new ArrayList<>(inputList).iterator());

Hosch250

I can do that easy enough, but how could I get the VM to update immediately?

skiwi

@rolfl It gets a bit ugly if the iterator definition is a few lines long though

rolfl

19:04

then create a static helper method....

super(entryParsers, buildIterator(inputList));

Gemtastic

@JeroenVannevel I don't invite satan into my home XD

Just kidding

skiwi

Good point there @rolfl, thanks a lot, I believe this should work then

rolfl

np

Jeroen Vannevel

@Hosch250 I don't know what you mean by that. The VM backs the settingspane, no?

Hosch250

Yes.

You see, I have my VM instance declared public in my MainPage.xaml.cs.

Jeroen Vannevel

19:06

ew

Didn't I complain about that already?

Hosch250

Yes, that is why I brought it up.

You said it should be private and the settings should be passed between them with a singleton.

Jeroen Vannevel

You really only need one viewmodel per page

Hosch250

The SettingsPane isn't really its own page - it updates the user settings.

So how would the VM know to update instantly if it isn't bound to the SettingsPane settings?

Captain Obvious

0

Q: Managing initialization for a vector abstract data type in C

As an assignment, I was to create an \$n\$-dimensional vector type for \$n \le 20\$. This vector only has to support addition and scalar multiplication. I tried to write good code, with proper memory management, error reporting, and a nice API. However, I have little experience with C so I would...

c

Jeroen Vannevel

Alright, couple o' questions first

skiwi

19:08

But now the AbstractLogReader no longer needs to be abstract... interesting

Jeroen Vannevel

1. How many viewmodel *types* do you have?
2. What model is bound to the `SettingsPane`?
3. Do you have a session object already?

1. longer test test with types

Hosch250

Not sure what you mean by "types"

Jeroen Vannevel

I don't know why it isn't putting types in italics

well, take this for example:

github.com/ProjectGroep1/Joetz-Windows/tree/master/ProjectenIII/…

That is my masterfully beautiful and elegant project

Hosch250

I have one VM class.

Jeroen Vannevel

Each page is backed by a viewmodel

no, ew

Hosch250

19:11

I only have MainPage.xaml and SettingsPane.xaml

So really, I only need the one VM, and something to handle the settings.

Jeroen Vannevel

Then you need at least two: one for whatever MainPage is about and one for settings

You store it globally in a session object, which uses the singleton pattern

like this

github.com/ProjectGroep1/Joetz-Windows/blob/master/ProjectenIII/…

Relevant code:

private static Session _instance;

private Session()
{

}

public static Session Instance
{
	get { return _instance ?? (_instance = new Session()); }
}

Hosch250

So, if I make it static, then there is only ever one instance, which is basically what I want?

What if I made a public static struct with the settings.

Jeroen Vannevel

No. Step away from the public static stuff.

Hosch250

OK.

Jeroen Vannevel

It will do sort of the same, but you will back yourself into unnecessary corners

Phrancis

19:13

> ##Update

After some experimentation, it appears the line numbers do carry over using IE 11, but not on other browsers tested. This may be pretty minor, as an IE 11 user could always just click Edit on the question and get the raw code from there.

Hosch250

OK.

Jeroen Vannevel

Structs have several restrictions accompanied with them

And a singleton is a well-understood pattern (and actually applicable here!)

Hosch250

So, where are my settings stored? Does my MainPage.xaml bind directly into the other class for the settings?

Jeroen Vannevel

But yes, in the end the idea is to have a globally available static object

No, your MainPage's codebehind can use the settings which you store in the session object

skiwi

24 of 31 now succeeded as opposing to 8 of 31, improvement, I call it

Jeroen Vannevel

19:15

doesn't have to be anything fancy, might just be a public Dictionary<string, string>() Settings property

or you create a custom type for properties for each setting, as you wish

Hosch250

So basically, MainPageVM has a SetFontSize int value which is bound to the FontSize in MainPage.xaml.

And SetFontSize needs to be updated when the setting is updated.

Captain Obvious

0

Q: Brute force algorithm C# - need optimization

I'm trying to create a C# brute force MD5 password checker. If I run it with "test1" without MD5, it completes in 15 seconds. This is the code: private string bruteForce(int lenght) { MD5 md55 = System.Security.Cryptography.MD5.Create(); char[] words = { ...

c#

Jeroen Vannevel

now you can just go into your code and do if((bool) Session.Instance.Settings["mykey"]) { /* bla */ }

Hosch250

So my MainPageVM is somehow bound to the session instance?

Jeroen Vannevel

Nothing is bound, everything just uses it

You probably have an explicit get; set; implementation, right?

I'd just add it there

Hosch250

19:17

Yes.

Oh, so Get - return value.

Set - (??)

Jeroen Vannevel

public int FontSize {get; set { NotifyPropertyChanged(); Session.Instance.Settings["fontSize"] = value; }

Brb, food.

Hosch250

SettingsPaneVM calls Set, but SettingsPaneVM can't access my instance of MainPageVM because the instance is private?

Phrancis

@Malachi Does your lang-vb.js.patch work ok or are you working on it?

Malachi

@Phrancis I didn't do much to it, I just added a key word to it. I am going to work on a VB6 version with the cool commenting thing though. but I don't have the time to do it at work right now...

Phrancis

That's cool I was just asking, do let me know whenever you have an update so I can update on my project :)

I just submitted a bug issue there about the IE 11 thing. Last update was almost 2 years ago so I'm not sure it will ever get done, but at least it's on the record.

Anyone care to chime in or change their vote:

The IE 11 is a pretty big deal breaker IMHO , since SE support that browser. I don't think using the edit option would be view as a valid alternative. — Marc-Andre 16 mins ago

@Marc-Andre I agree and feel disappointed

Hosch250

19:34

Yeah, but is there a work-around available?

Phrancis

No idea. I think SE have made modifications to Prettify (for example, the scrollbar on long code blocks) and not sure how their system would treat line numbers. It's not open source so I don't have a way to fork it to test

<pre><code>id_user           dtl_master              date
  1         {"el1":"2","el2":"3"}       2015/01/01
  2         {"el1":"2","el2":"3"}       2015/01/01
  3         {"el1":"5","el2":"6"}       2015/01/01
</code></pre>

This is how the code blocks are formatted on SE. The "normal" way of using prettify is like this:

<pre class="prettyprint linenums">
code here
</pre>

rolfl

Thanks @Jamal - edit edited

Captain Obvious

0

Q: Basic duel fight with OOP

How would you improve on this? It's been fairly long since I last did a bit more extensive in C++ so I'm looking for ways to be more compatible with modern C++ ways, and this style of OOP. I think especially the user action part and new opponent generation might be what needs the most work? Thank...

c++ oop

Jeroen Vannevel

@DJanssens: did you buy your ryanair ticket from bookryanair.com or cheaptickets.be?

DJanssens

19:49

@JeroenVannevel ryanair.com

Jeroen Vannevel

bookryanair.com/SkySales/…

Shows a price of 13289 HUF

How much booking taxes got on top of that?

That's +- 40€

Malachi

@Phrancis what is the issue with IE 11?

Damn it IE, catch up or get the hell out of the way!

2

Phrancis

1.// this is a comment
2./*
3.** Block quote
4.*/
5.public static class Evaluate
6.{
7.    public static string FizzBuzz(int start, int end)
8.    {
9.        return Enumerable.Range(start, (end - start) + 1)
10.            .Select(FizzOrBuzz)
11.            .Aggregate(String.Empty, (y, x) => String.Format("{0} {1}", y, x))
12.            .Trim();
13.    }
14.
15.    public static string FizzOrBuzz(int n)
16.    {
17.        if (n % 15 == 0) return "fizzbuzz";
18.        if (n % 3 == 0) return "fizz";

When you copy&paste a Prettified code block with line numbers enabled

Malachi

do you have an example somewhere?

I found a link

even Copy Paste from GITHUB is clunky with IE 10 and grabs the line numbers....

DJanssens

@JeroenVannevel servr error from that link

but if I remember correctly we didnt had to pay booking taxes

or it was something minimal

Phrancis

19:56

Yeah, it's clear IE is the issue

Hosch250

@JeroenVannevel SettingsPaneVM calls Set, but SettingsPaneVM can't access my instance of MainPageVM because the instance is private?

Jeroen Vannevel

@DJanssens Yeah I'm noticing the same. Aside from the "big hand luggage" that's restricted to 10kg and 55x40x20cm. Guess I'll have to put it in the baggage room

@Hosch250 Your viewmodels shouldn't work together

Why does your MainPageVM has the fontsize in the first place?

It's set in the settings pane

Hosch250

So that setting should be bound to the SettingsPane?

DJanssens

I had luggage that fitted thse measurements

Jeroen Vannevel

@Hosch250 Yes, because that's where it is being interacted with

Hosch250

20:03

Even though it changes something in the MainPage (or more accurately for expansion, app wide)?

OK, I see.

Jeroen Vannevel

wait

How does it change from your MainPage?

Hosch250

I thought you were telling me not to earlier.

It does not change from the mainpage, it changes the mainpage.

Jeroen Vannevel

And you can access it through the Session object

so that's no problem

Hosch250

OK, now I get it.

Thanks.

Jeroen Vannevel

np

Hosch250

20:06

Now of course, everything will probably change with the release of 10, and I'll have to do it over again :(

Jeroen Vannevel

@DJanssens I'm way past it with my hikers bag, sadly

Hosch250

How did you get so lucky to be able to take classes for studying this?

DJanssens

Ic

Jeroen Vannevel

@Hosch250 Aren't you studying programming in school as well?

Hosch250

I'm stuck with philosophy and multimedia applications.

@JeroenVannevel No.

I'm online, they only offer three programming online.

Jeroen Vannevel

20:08

Are you from the US?

Hosch250

And, there are all JAVA (not Java).

Yes.

Jeroen Vannevel

Hah

Hosch250

Anyway, I'm an IT Management major, not CS.

Jeroen Vannevel

Yeah okay, one year of computer science in a US university costs more than 10 times my entire college education

You know the free online courses, right?

Hosch250

Yeah. State U, resident.

Jeroen Vannevel

20:09

Given by MIT and Stanford and all those fancy things

Hosch250

You mean Coursera?

Or through their page?

Jeroen Vannevel

Yeah and a few others

Hosch250

I can't really do Coursera/

They all start when I'm in finals, or finish when I'm starting, or overlap completely.

The U did it on purpose, too.

(No evidence here)

Jeroen Vannevel

Coursera is the entire year, really. And you can just do it on your own tempo

Hosch250

I should persuade my parents to let me come over there.

Jeroen Vannevel

20:11

There's a few others as well

Hosch250

I have all but one class a 4.0 not counting this semester.

And that was an A-.

Maybe I could get a scholarship too.

I don't know Dutch, though :(

Jeroen Vannevel

Studying in Europe will cost you quite a bit as well, as a non-EU citizen

Hosch250

My parents would never consent, either.

I should go to AK, they have free college.

My parents won't let me do that either :(

Jeroen Vannevel

You need to rent a place (in Belgium typically +- 300€ / month for a student apartment), pay around 1000€ for a semester and show that you have the financials to back you up too

Hosch250

They fund it with the oil money, because the state owns the oil industry in Alaska.

The residents get the surplus.

Jeroen Vannevel

20:15

Oh, Alaska. I thought Arkansas

Hosch250

No, AR for Arkansas (I think).

bing.com/search?q=arkansas+abbreviation&FORM=SSRE

Mat's Mug

@Hosch250 your posting of bing.com links always cracks me up

Hosch250

:)

Crappy Experience Bye

Another article of anybody is interested: lokiastari.com/blog/2015/01/15/…

Mat's Mug

never mind me, I keep reading "SP" as "Stored Procedure" ;)

Crappy Experience Bye

20:19

Sptr better

or SPtr

Mat's Mug

"SP" is fine in the context of the blog, well written BTW!

Crappy Experience Bye

Thanks.

Hosch250

Oh well, I think I'm better off here anyway - I good at math, but I'm no genius.

Stack Exchange

0

Q: Can I ask for feedback on an idea for a standard?

I'm looking to come up with a standard for how to implement a system that will automatically update software. As such, there is no actual programming per se, but I still want to make sure my standard is robust before moving on to the stage where I build a proof-of-concept prototype. I have a goo...

discussion scope

Hosch250

I'd need to take Calc III to do CS.

Phrancis

20:27

First post on Webmasters, let's see how it goes... webmasters.stackexchange.com/questions/76169/…

Hosch250

Shall we invade WebMasters and upvote it?

Phrancis

Your call

Hosch250

JK, but it already has one.

I don't have an account there.

Phrancis

I don't know the culture there, I checked the chat room but nobody was there

Hosch250

I wonder why the wiki article on Plato mainly covers Socrates?

Mat's Mug

20:29

@Phrancis huh? how is that possible!!

Phrancis

I thought the same thing!

Mat's Mug

2nd Monitor spoiled us all...

Hosch250

Yeah, some are deader than dead.

Phrancis

Hosch250

WPF is usually in the first page at SO, and it is dead from late Friday through Monday morning every week.

Phrancis

20:31

> 4 days later...

Hosch250

What about the one at Academics?

That is terrible too.

Captain Obvious

0

Q: Simple DRY Rails - check if a model belongs to a user

I can clearly see I'm repeating myself, but I don't know how to refractor this without making it really ugly. What I have: class ChildModelController < ApplicationController def new @model = ParentModel.find(params[:id]) # Does the current user have permissions on the parent...

beginner rails

Mat's Mug

@Phrancis wow

DJanssens

@JeroenVannevel Bit late, but Coursera isn't the entire year through, it also starts at specific moments, the 'homework' there also has deadlines, which if missed cost you points. To achieve a statement of completion or certified certificate you really need to be motivated :)

Hosch250

My sisters have done a couple courses there.

DJanssens

20:34

That said, the courses given there are very interesting and some are even better than the courses given at my university

I did the Mobile development course of Adam Porter there, I even payed for a certificate, mainly because I found it such an awesome course

Hosch250

In Java?

DJanssens

Android, so yes

:)

Jeroen Vannevel

@DJanssens Oh sure, if you want the certificate. But I don't think they're that important

Hosch250

I've never touched Android.

DJanssens

Nah they probably aren't, I just wanted to support the course

Jeroen Vannevel

20:35

You can just put "Followed Coursera's course on X" on your resume if you do it anyway

DJanssens

though it looks cool :D

Hosch250

I have a OneNote cert that I watched 2 hours of videos from MS.

I learned one thing.

Jeroen Vannevel

Ended up with a 75.5€ cost from what started as a 40€ flight

could be worse, I suppose

DJanssens

from the extra luggage

Hosch250

Need to go now, see you.

Jeroen Vannevel

20:37

Still better than the cheapest alternative: 227€

yeah, 25€ was from the luggage alone

DJanssens

Those courses are pretty beefy at Coursera

I spend quite some hours on that Mobile development track.

Jeroen Vannevel

I did the first 3 or 4 lessons on Algorithms once

with Robert Sedgewick

DJanssens

he was awesome

Jeroen Vannevel

I ended up buying his book, not finishing the course and not finishing the book

DJanssens

the old guy, right?

Jeroen Vannevel

20:38

Yet another book that is now halfway and will be finished in a few years

DJanssens

I only checked his first 2 videos too iirc

I tried Cryptography a way back (offered from stanford), but my mathematical background was lacking :p

Jeroen Vannevel

Almost 100 upvotes on my Programmers question.

Who knew I could ask smart things as well

Mat's Mug

20:54

yeah, who knew!

Jeroen Vannevel

SURPRISE BIEBER

Gemtastic

D:

Jeroen Vannevel

Cannot counterflag my own message?!

Don't hate on Biebs

Captain Obvious

21:11

0

Q: Possible class redundancy and improper enum usage

I am looking for code correctness and design usage as I think I might be over doing it in the class department. There are two things I'm mostly concerned with. The possible redundancy of classes derived from IPerks. As CommonPerks, UncommonPerks, etc, all look identical except for the rows/col...

c++ game inheritance enum

Mat's Mug

@JeroenVannevel dude, WTF!?

Jeroen Vannevel

@Mat'sMug I have a biebs song on my spotify

sue me

Simon André Forsberg

Oh, Ms. Black, where are you?

Mat's Mug

@JeroenVannevel out of stars....

Simon André Forsberg

@JeroenVannevel I am one of the few people that like Rebecca Black's "Friday", I for one won't sue you.

@Mat'sMug he said sue me, not star me...

Mat's Mug

21:22

where's the sue button?

Phrancis

@Mat'sMug RSA

Mat's Mug

danke

Phrancis

bitte schön

Jeroen Vannevel

eh, I've got bieber, backstreet boys, britney and a few more on my spotify

I'm liberal in that kind of stuff

Phrancis

D;

Jeroen Vannevel

21:31

I walked to the station listening to Backstreet's Back

You can't not shake your booty

it's magical

Phrancis

You probably wouldn't like my Spotify. Full to the brim with punk rock, industrial, metal and techno...

skiwi

I'm boring and just have the Top 100 on spotify

Jeroen Vannevel

Eh, I've got metal, hardstyle, jazz, piano, dutch schlagers, german schlagers, 80s pop, soviet anthems, goldies like this, eminem, etc

I listen to a lot

skiwi

@JeroenVannevel ok, ok, ok, ok, ok. soviet anthems, wtf?

Jeroen Vannevel

you've never listened to them?

skiwi

21:37

actually, no

Jeroen Vannevel

open.spotify.com/user/11146805827/playlist/…

Artist: The Red Army Choir

skiwi

I tried to listen to Eminem one time on the highway, I got confused thinking cops were all around us

Though I really think Eminem ft. Rihanna - The Monster is really cool

Phrancis

I like Eminem, unlike most other rap. It's vulgar, but there are songs with very profound messages.

Jeroen Vannevel

yeah, his texts have a lot more depth than the typical rap songs

Mat's Mug

true

Phrancis

21:41

And of course there are the funny, self-deprecating songs too :D

Mat's Mug

I'm into Muse these days

skiwi

For the rest, when I'm actually listening to music it's a lot of alternative rock - Linkin Park, Three Days Grace, Bullet for My Valentine, etc.

but I can honestly listen almost everything... I can even survive Hardcore/Hardstyle for like half an hour

Phrancis

Anything except Happy Hardcore - UGH.

Jeroen Vannevel

Hardcore is awesome. Going back to Reverze at the end of February

Hosch250

I stay away from rock and rap.

I wonder if I should propose an SE site - Answer Review.

skiwi

21:44

Psst, that's essentially the rags-to-riches tag

Mat's Mug

^^ that

Hosch250

That is Question review, though.

skiwi

also works for answers, but they must be posted as separate questions of course then

Hosch250

I see.

It wouldn't work for all answers, though.

skiwi

Talking about music... I should go play Tony Hawk Pro Skater 2 again

DJanssens

21:46

I found a pretty epic song today, randomly, not sure if anyone of you knows it? youtube.com/watch?v=IU22lKGevhI

Hosch250

Nope.

Ever heard of the Corries?

skiwi

or Need for Speed Underground 2

Hosch250

The Bricklayers Song or The Sunday Driver?

Simon André Forsberg

@Hosch250 What's wrong with voting and comments?

DJanssens

nope :$

Hosch250

21:47

Nothing.

SirPython

Ever heard of Shreveport Stomp by Jelly Roll Morton?

Hosch250

I've heard of Jelly Roll Morton.

He's in our encyclopedias.

Mat's Mug

@Hosch250 I repeated some of your points, had a draft already when I saw your answer ;)

Captain Obvious

22:03

0

Q: Returns the year for each month by period - nested case statements

def return_year_by_month_and_period(month) pw = self.property_water.first().billing_increment case pw when "12" self.property_water.where(period: month).first().year when "6" case month when 1, 2 self.property_water.where(period: 1).first().year when 3, 4 s...

ruby ruby-on-rails

rolfl

Well, I just had some fun organizing histograms....

Mat's Mug

A Slime draws near! Command? ...love it! — Mat's Mug 1 min ago

rolfl

That 4-word song gets Lee's nod of approval, @DJanssens ... thanks

And now it's time for burgers, and, if folk have not yet seen the palindrome q feel free.

Phrancis

Ummmm... I think this should be deleted?

Or at least downvoted to hell

Mat's Mug

@Phrancis it.. is a CR answer - one that says "looks good" ...and sticks a foot in the mouth

Phrancis

22:11

Ducky's is far superior, for damn sure.

Mat's Mug

> You've got a pretty big bug here. You don't actually end up with unique items in your final list.

well...

the dictionary is a wise decision

rolfl

> declined - flags should not be used to indicate technical inaccuracies, or an altogether wrong answer

Just FYI... all ;-)

Spend the 1-rep and down-vote.

Phrancis

@rolfl Bah :p

Jeroen Vannevel

NO MERCY

Mat's Mug

> Also, starting a new thread incurs some overhead - if I'm not sticking a foot in my mouth here, using the TPL the framework determines if it's a good idea to start a new thread or to let code run sequentially... which may buy you some extra performance right here.

right?

Jeroen Vannevel

22:19

context?

Mat's Mug

3

Q: Brute force MD5 password checker

I'm trying to create a C# brute force MD5 password checker. If I run it with "test1" without MD5, it completes in 15 seconds. I would like to make it faster, but I'm a c# beginner, and don't know how to optimize code anymore. Basically, instead of nested for loops, if using flags (of type boolea...

c# beginner cryptography

actually in my answer

Jeroen Vannevel

I've never actually worked with parallelism in C#, only asynchronicity. Although they sort of overlap, the Parallel stuff is foreign to me

It could be, though

Oh, the TPL also includes that of course

DJanssens

@rolfl yw :)

Jeroen Vannevel

I've never heard of that to be honest

Mat's Mug

it's not clear how many threads OP is starting (what's stevilo.Text anyway?), but he's starting threads in a loop, ...doesn't sound too ideal, but I'm not exactly a MT guru

Jeroen Vannevel

22:25

I don't think there's any reason to still use Thread when Tasks are available

Mat's Mug

exactly

Jeroen Vannevel

Thread.CurrentThread.Abort(); also raises some eyebrows

Mat's Mug

uh-huh

TTQW

crickets

Hosch250

@Mat'sMug No problem.

I need to do another multi-threading some time.

Let's see, the barbershop problem? The Dining Philosophers problem?

Jamal

Thanks, Santa!

Hosch250

22:41

Are you pretty close to Epic?

Jeroen Vannevel

Well I don't mean to brag.. But people say that about me from time to time

Jamal

> earned at least 200 reputation on 10 days

Not even close.

Hosch250

10 times closer than I am.

Malachi

22:56

@Mat'sMug I expanded on your comment about removing dead code a little bit, check it out

0

A: Brute force MD5 password checker

I am going to look at your button call a little bit and see if we can make it a little bit cleaner, first and see where we end up. private void Button_Click(object sender, RoutedEventArgs e) { int l = Convert.ToInt32(stevilo.Text); // lenght = 1; // string a = ""; ...

rolfl

@JeroenVannevel Where is that?

Jeroen Vannevel

@rolfl SO

Don't worry, I'm much sweeter on CR

rolfl

K, they can have their bunfights....

But your profile does not represent that....

Jeroen Vannevel

I look aggressive?!

rolfl

No, it's that when I look at your recent profile it looks completely different.

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