The 2nd Monitor

6:11 PM

So...CR is 3x as active with better numbers than Movies&TV, and M&TV is scheduled for graduation. Anyone know if CR is on that schedule as well?

Oh, and if y'all know any modelers : area51.stackexchange.com/proposals/63543/model-hobbyist

Captain Obvious

0

Q: angular ui.route best practice

I'm new to ui.router in angular and have to build a app. it contains a header, sidebar (off-canvas), feedback area (save successful and warnings area) and a content area. I thought it would be best, if i split up all things and create different (nested) ui-views. and that's the result index.html

ckuhn203

@JohnP I used to build and fly airplanes, but it's too expensive.

JohnP

@ckuhn203 - I never got the hang of the controls for flying, I'm more of the fire and forget (rocketry) type.

VoiceOfUnreason

@rolfl Email template singletons: broken code is off topic, right? so the question really belongs somewhere else (stackoverflow, programmers), rephrased as a "why does this code produce weird instance counts?" which presumably has something to do with the static methods inside, rather than outside, the enum definition

Actually, strike that -- I misread my output when I attempted to repro the issue. I haven't the foggiest idea why the profiler is saying that

If you guys are right that the profiler is the wrong tool to use, then it becomes a very interesting question for somewhere else

ckuhn203

@JohnP I saw a guy with a rocket glider once. I've wanted to build one ever since.

JohnP

6:24 PM

@ckuhn203 - That's an easy one to build, actually. They're a lot of fun except in a crosswind :p

ckuhn203

I couldn't ever figure out how to keep the wings from ripping off.

James

hello

@rolfl are you there?

@rolfl The code works fine. I am trying to understand why the single instance is not doing what it's suppose to do.

rolfl

Hey James.... yeah, I'm here.

Real life happened.

JohnP

@syb0rg - What about putting dyslexic curse words in a profile photo so they show up on every question/answer?

stackexchange.com/users/1576026/user1462451?tab=accounts

Malachi

@rolfl I do sometimes....

James

6:34 PM

I just started using profiler (jprofilier) and when I did. I see multiple instances of a class that's only suppose to have 1 instance.

rolfl

Your code produces two instances at least.

One for each enum member.

James

yes,

rolfl

So, there's the FORGOT_PASSWORD instance, and the CONFIRM_EMAIL one

James

yes.

rolfl

Are you seeing multiple instances with the same internal mFile?

James

6:36 PM

no.

rolfl

Right, so are you sure there's a problem with multiple instances that are unexpected?

skiwi

Wow, I think I just figured what my bug was... I forgot to send the extra newline after the headers of the HTTP request

James

I am trying to understand the profiler. I assumed if the instance count is not 1 then multiple instances are being created.

syb0rg

@JohnP lol

JohnP

@ckuhn203 - nar.org/competition/plans/competitionplans.html

ckuhn203

6:39 PM

Awesomesauce @JohnP!!! Thanks.

rolfl

@James There are two things to consider here: 1. the profiler does not claim to be 100% accurate, and 2. you should expect one instance at least, for each enum member....

I cannot see anything wrong with the code....

(not buggy-wrong, anyway).

skiwi

Does the profiler estmate or really count here?

James

@rolfl The code works fine. I was just wondering why I was seeing multiple instances.

rolfl

I believe, in most instances, the profiler samples, and guesses.

it cannot track each and every allocation without a huge performance hit.

skiwi

I think with the Netbeans profiler you can set it to really count, but it does introduce a 3x overhead

rolfl

6:43 PM

It may also back-count the references, and the references may end up 'virtually' duplicated in memory, even though the apparent members are unique.

all depends on how the JVM actually implements the code.

Especially with JIT, and other factors.

skiwi

Once you're done with the discussion, I've got somethign interesting over here as well

James

Thanks.

rolfl

So, @James, I think the profiler has thrown you a red-herring.

syb0rg

Could use some help on an SO question: stackoverflow.com/q/24561016/1937270

James

@rolfl Yes. it did I thought, I was doing something wrong.

rolfl

6:46 PM

The profiler is not intended to be an exacting micrometer of your system... it's a relative thing, a guide.

So, I recommend you revise your question, bcause the code you do have, is interesting, and would be good for the review as working code, not as something buggy.

James

Okay cool. I'll do that asap

skiwi

I'm at a loss here... I've got a website that does not respond to pings neither on it's domain name nor on it's ip address, yet it does serve a certain file.

rolfl

@skiwi ... what's up?

@skiwi that's normal.

skiwi

@rolfl How is it?

rolfl

ICMP packets (pings) can be routed and ignored, and 'dropped' at the discretion of the recieving end of the system.

JohnP

6:49 PM

@ckuhn203 - Also: www2.estesrockets.com/pdf/2266_TR-4_Boost_Gliders.pdf

rolfl

Most hosting services will drop ICMP packets...

skiwi

I don't see many actual servers do that... Even though my experience mostly consists out of google

syb0rg

@skiwi This is due to their use in DDoS attacks. Many servers do this now.

skiwi

The underlying problem I'm solving is that I am rerouting currently a HTTP/1.1 GET request

rolfl

which is a TCP connection.... not ICMP.

skiwi

6:51 PM

But it's simply dropped, I may be confused on how I should send it, declassified example of the request:

GET top.secret.com/secretservices/services/TopSecretServices?wsdl HTTP/1.1
User-Agent: Java/1.8.0
Host: top.secret.com
Accept: text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2
Proxy-Connection: keep-alive

rolfl

@skiwi - here's an example: thegeekstuff.com/2011/06/iptables-rules-examples

skiwi

Now my proxy server intercepts this message, and I need to resend it

rolfl

The default setting for linux servers is to drop all ICMP packets.

skiwi

@rolfl That probably explains

rolfl

you have to have "rule 12" to re-enable them.

skiwi

6:53 PM

And now I need to reconstruct the original destination of the request

rolfl

(that's if you turn the firewall on, without the firewall, it accepts everything.

skiwi

Which in turn is:

String hostValue = headerMap.get("Host");
if (hostValue != null) {
    if (hostValue.contains(":")) {
        String[] hostParts = hostValue.split(":");
        address = InetAddress.getByName(hostParts[0]);
        try {
            port = Integer.parseInt(hostParts[1]);
        } catch (NumberFormatException ex) {
            //ignore
        }
    }
    else {
        address = InetAddress.getByName(hostValue);
    }
}

Socket outputSocket = new Socket(address, port);

With above that bunch of code:

InetAddress address = InetAddress.getByName(new URL(url).getHost());
int port = DEFAULT_HTTP_PORT;

Former is to have HTTP/1.0 compatability

Now as destination it has selected address = top.secret.com and port = 80

rolfl

Use Squid ... ?

I need to get to a meeting.....

skiwi

Aw ok

I need to handcraft it because I need to change some headers based on some rules

Thanks @SimonAndréForsberg!!!

I just remembered your advice on printWriter.flush()

So the code I just posted here is correct

Stuart Blackler

7:10 PM

Out of interest anyone know of a decent radix tree implementation either in java or c# that uses generics? (If its java ill port to c#)

skiwi

Hmm... I don't even know what a radix tree is

Stuart Blackler

Radix tree

In computer science, a radix tree (also patricia trie or radix trie or compact prefix tree) is a space-optimized trie data structure where each node with only one child is merged with its parent. The result is that every internal node has up to the number of children of the radix of the radix trie, where is a positive integer and a power of 2, having ≥ 1. Unlike in regular tries, edges can be labeled with sequences of elements as well as single elements. This makes them much more efficient for small sets (especially if the strings are long) and for sets of strings that share long pref...

skiwi

I don't know anything

Simon André Forsberg

@skiwi Lucky for you I had the same issue just a couple of days ago, and realized a flush was needed :)

skiwi

@SimonAndréForsberg I totally forgot to add it when you said it

Simon André Forsberg

7:15 PM

I actually did the same error twice just a couple of days ago, both in the client and in the server...

I hope I have learned my lesson now.

skiwi

@SimonAndréForsberg Atleast you didn't fool yourself twice at the exact same spot

Simon André Forsberg

@skiwi At least not that time.

@Mat'sMug 2864 rep to target!

Incoming JDQ #153 !

Captain Obvious

7:34 PM

0

Q: Delete N nodes after M in a linkedlist

Given a linked list and two integers M and N. Traverse the linked list such that you retain M nodes then delete next N nodes, continue the same till end of the linked list. Diagram is Input: M = 2, N = 2 Linked List: 1->2->3->4->5->6->7->8 Output: Linked List: 1->2->5->6 Looking fo...

java data-structures linked-list

Malachi

@Mat'sMug, I really want that bounty!

Captain Obvious

8:16 PM

0

Q: Unity DI Composition Root vs XML

I'm having trouble figuring out the best approach with DI. After doing more research, Mark Seeman recommends using the Composition Root approach. In my example, I am using XML configuration to design my mappings which allows me to drop any new dll that implements an interface without having to pe...

c# design-patterns dependency-injection

Captain Obvious

8:29 PM

-1

Q: I still get Wrong Answer even verifying some extreme test cases

I'm working on this problem : http://www.codechef.com/problems/DIGJUMP I tried many test cases, and all of them are right. The solution implements BFS, but I don't know where the problem is because I still get wrong answer when I submit. Here's my code: http://www.codechef.com/viewsolution/409704...

c++

Simon André Forsberg

#smash

0

A: Given a BST, transform it into greater sum tree

Compiler Warnings Iterable is a raw type. References to generic type Iterable should be parameterized This is very easy to fix. It's horrible that you haven't fixed it already. I'm sure that you know what generics is by now so I don't need to explain it to you. Whenever you see this warning...

@rolfl I think our dear JavaDeveloper might have circumvented our "working code" requirement. Or he's just... I don't know what... confused? Mistaken?

JohnP

@SimonAndréForsberg - "Given how many trees I've seen you implement, I really thought your code would be better than this."

Simon André Forsberg

@JohnP Too harsh?

JohnP

One wonders if he's cut/pasting code rather than doing it himself. (And no, not harsh at all)

Simon André Forsberg

@JohnP Then where's the vote?

JohnP

8:42 PM

what vote?

Simon André Forsberg

lol, nevermind :)

JohnP

@SimonAndréForsberg - I can tell you he's getting all of his "assignments" from geeksforgeeks, unless that's a known thing.

Simon André Forsberg

@JohnP geeksforgeeks? Never heard of it. What's that? Where's that?

JohnP

geeksforgeeks.org/convert-bst-to-a-binary-tree

geeksforgeeks.org/delete-n-nodes-after-m-nodes-of-a-linked-list

That's his last two questions on the BST and the linked list word for word.

Still trying to find if he cut/pasted a known answer or is just taking known answers and trying to dupe in java.

Mat's Mug

@Malachi I'll read all answers tonight and see who's earning it :)

Malachi

8:53 PM

:)

Mat's Mug

TTQW - first day was fun! :)

4

Simon André Forsberg

@JohnP Doesn't look like he's copying anything

Malachi

@Mat'sMug have a nice relaxing evening!

JohnP

Yeah, I can't find any copies either. Definitely the major source of his questions though.

Simon André Forsberg

@JohnP Indeed. I didn't know that before. I don't think anyone else knew it either.

Malachi

9:03 PM

Where's @Phrancis when you need him? LOL JK

anyone else good with SQL and SSRS?

JohnP

@Malachi - I've heard of SSRS...

Simon André Forsberg

Your bounty on question "Capture the notion of invertible functions" has expired.

:(

Edward

@JohnP It's a class of antidepressant, isn't it?

No, I guess that's SSRI...

JohnP

@Edward - I dunno, I find my SQL knowledge to be pretty depressing at times...

But yes, SSRI (Select Seretonin Rsomething Inhibitors, IIRC)

Edward

@JohnP SQL is depressing when you've forgotten it, and depressing when you haven't.

JohnP

9:12 PM

Where does "haven't learned much of it yet" fall in that spectrum?

Edward

@JohnP That would be "preparing to become depressed"

JohnP

Ok, that's where I'm at.

Edward

I"m a big fan.

JohnP

@Edward - My computing history: Minor in CS, 1993. Didn't program again until 1999, upon which time I spent 12 years exclusively doing Clipper and Cold Fusion. Now I'm playing massive catch up, and it sucks.

I always know what I want to do, just not how to do it. And OOP still confuses me somewhat.

And things like this:

<?xml version="1.0" encoding="utf-8"?>

That gives me a warning in one android app, but the same line doesn't warn in a different app. qua?

Edward

I've been programming since the 1970s and I still have those kinds of moments.

As I have explained to colleagues over the years, only half joking...

JohnP

9:21 PM

Me too, I just took large gaps in the middle. My first computer was a Vic-20 with the 16k memory expansion and an 8 cassette "Teach yourself BASIC" package.

Edward

"The mistake you're making is to assume that computers run on logic..."

JohnP

"The good thing is that computers only do what you tell them to. The bad thing is that computers only do what you tell them to."

Malachi

@Edward so not true. I like SQL

Edward

I don't know what you're doing for learning OOP, but IMHO, if you're using C++, The C++ Programming Language, 4th ed by Bjarne Strostrup is good. If you're using Java, I think the Big Java books are pretty good.

JohnP

@Malachi - I like SQL like I like root canals. The only good thing about it is the final result.

Edward

9:25 PM

@Malachi I like assembly language. Some people consider it to be a personality flaw.

JohnP

C#, Android and probably ASP.Net in the near future.

Malachi

@JohnP you mean C# and Java

Edward

@JohnP If Android, then probably Java, right?

Malachi