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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. |
On September 28 2016 02:36 Silvanel wrote:Show nested quote +On September 28 2016 01:08 maybenexttime wrote:On September 28 2016 00:47 Silvanel wrote:On September 27 2016 22:57 maybenexttime wrote: Let me first introduce myself briefly. I am a mechanical engineering graduate who'd like to learn some Python and MATLAB programming, because I consider programming an important skill in every engineer's repertoire. For the past two months I have studied both languages and worked on some private projects of mine since that seems to be the best way to learn useful things.
. Heh. Strange coincidence i am also mechanical engineer (material engineering to be precise) and Python also is my langauge of choice (and also Polish  ). I cant help You with MATHLAB though, never had time to learn it properly. Will try to help with Python if i can though. BTW Which Uni did You gradute from? Strangely enough, I specialized in structural materials engineering.  I graduated from Wrocław University of Technology/Politechnika Wrocławska. And you? :-) Technical University of Łódź
Poland strong
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ok, so, talking about java clone method
you have to
1.) implement the cloneable interface to say that the class is cloneable
then 2.) override the method:
protected Object clone() throws CloneNotSupportedException {
return super.clone();
}
and then 3.) object.clone(); //will return a shallow copy
but if I want to return a deep copy, what do I put in the clone method? maybe someone could give me an example where the extended class just has 1 member
I know that most advice seems to be "don't bother using the clone method for deep copies", but I think this may be asked on my exam anyways.
here is another question, this one is about testing coverage
"if you have 100% conditional coverage, do you automatically have 100% statement coverage".
I said no, because maybe you wrote methods and then don't use them? but maybe that's a silly answer. is there another reason why it could be no?
and
"If you have 100% conditional coverage, do you have 100% flow coverage"
I think flow coverage means that the tests cover all the possible paths of flow, like all the ways that conditions could play out? so the answer here would be definitely no because as a program get big flow coverage would become impossible to obtain.
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On September 28 2016 09:09 travis wrote: here is another question, this one is about testing coverage
"if you have 100% conditional coverage, do you automatically have 100% statement coverage".
I said no, because maybe you wrote methods and then don't use them? but maybe that's a silly answer. is there another reason why it could be no?
and
"If you have 100% conditional coverage, do you have 100% flow coverage"
I think flow coverage means that the tests cover all the possible paths of flow, like all the ways that conditions could play out? so the answer here would be definitely no because as a program get big flow coverage would become impossible to obtain. 100% conditional coverage implies 100% statement coverage. Dead code (as you mentioned) is usually ignored in testing since it can not be tested anyways. However, 100% conditional coverage does not imply 100% flow coverage. This is because of loops. Conditional coverage only has to enter a loop 2 times at most, once where the loop condition is evaluated to true and once where it is evaluated to false. A 100% flow coverage would have to cover all possible iteration counts of all loops. Often times this is not even possible.
Here is some more explanation done by people who have more time on their hands than I: http://programmers.stackexchange.com/questions/185869/is-path-coverage-stronger-than-condition-coverage
https://sites.google.com/site/swtestingconcepts/home/test-design-techniques/for-white-box/statement-branch-and-path-coverage
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Alright, the exam was tough but I think my studying paid off and I probably did pretty well. Many of the questions I knew because of what I had gotten clarified here, including the post directly above this one.
edit:
just realized I can't post exam questions online. Well anyways I think I probably got a high B or an A. The only question I know I missed was on using an interface in an anonymous class and it had the most confusing wording I have ever seen.
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Why cant you post exam questions online?
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So, we had like a dozen interns for the past month. Their job was to create an Android app integrating with one of our systems. Tomorrow is their last day and today me and one other friend got a first look at it (we'll be tasked with polishing it and fixing any bugs). Holy mother of all monsters...
Just to give you some idea of what's going on in there (I won't even mention utterly atrocious and inconsistent formatting):
class someclass(){ // yup lowercase almost everywhere Sth sth = new sth(); Sth sth = new sth(); Sth sth = new sth(); Sth sth = new sth(); Sth sth = new sth(); Sth sth = new sth(); Sth sth = new sth(); Sth sth = new sth(); Sth sth = new sth(); Sth sth = new sth(); Sth sth = new sth(); Sth sth = new sth(); Sth sth = new sth(); Sth sth = new sth(); Sth sth = new sth();
// lots of code. Obviously, sths aren't the same in their code but a different class // each, wrote it like that so it was faster. // They're not initializing classes when they need to but instead do it all in one go // in a single god-class that controls everything // (and almost all fields of all classes are public...) }
public somemethod(String str){ somefield = str; if (somefield == something) { // do some stuff } return somefield ; // obviously, somefield isn't used anywhere else }
str.append('\r'); // why?! no one even uses macs in our company...
/** * @param v */
I want to cry... To fix this we'll basically have to rewrite it from scratch.
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On September 29 2016 07:06 solidbebe wrote: Why cant you post exam questions online?
school policy probably in the case that other students go to that website and have yet to take the exam because of being sick or something
though our comp sci department is different from other departments in that you can't post it even after it's been graded and returned
actually last year we weren't even allowed to have our final exams back. maybe they reuse questions sometimes.
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On September 29 2016 07:47 travis wrote:Show nested quote +On September 29 2016 07:06 solidbebe wrote: Why cant you post exam questions online? school policy probably in the case that other students go to that website and have yet to take the exam because of being sick or something though our comp sci department is different from other departments in that you can't post it even after it's been graded and returned actually last year we weren't even allowed to have our final exams back. maybe they reuse questions sometimes. At our CS department we reuse questions all the time and yet we allow students to share their exams online. Did not do anything positive for their grades. The bad ones still fail. I believe that even if we printed out all the answers and handed them out 1 week in advance they would still manage to somehow fail the exam.
The main reason why we allow it is that its just too much of a hassle to fight it. Especially with all the new technology of today. Nobody is going to fight that losing battle.
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My university provided every single exam online going back over a decade, pretty handy for revision.
@manitou ROFL I guess could only really be solved by investing a lot of time into oversight of the interns, which could be pretty expensive. But either way you have to invest time into either fixing it after the fact or fixing it while they code. It's a real shame that universities don't teach better coding practice, although they don't really have time and I guess the more "sciency" part of CS is more useful in the long run. I had to learn it all pretty much separately from university for the most part (not completely true), stuff like DRY and SRP and so on.
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something something universities are for research not to get you a job something something it's unfortunate society has made university education mandatory to join the workforce something something practical job related skills should be acquired elsewhere something something should not confuse using practical examples in courses to teach concepts as career training
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Yeah. We try to teach good coding practice at our university, but the practical course is just one class out of dozens that you will do over the course of your bachelor. And it only gives a tiny amount of credit points.
I always say: If you just want to learn coding there are professional schools for that. But your salary is tied to your academic achievements nowadays so everybody is flocking to the universities.
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Amazon can go fuck themselves. They're trying to automate the entire test process it seems (though they're trying a bunch of different things so I know people who have completely different formats and I have), and I think it sucks.
This particular round, I had to sign up for this shitty proctor system where another person watches you the entire time via your webcam and microphone. You need to be completely alone and give the proctor a complete view of the room and ensure there is nobody else close, which is hard when you don't have a room to yourself. Whatever. I sign up, go through all these authentication procedures, then start the test.
First part is a hilariously dumb "work simulation" where you literally answer (multiple-choice and rating different responses) answer IMs and emails about projects in a fake work environment. Utterly inane approximation of the workplace.
Not to mention that before this round they have this SAT-type useless high school logical test, where they do shit like "if aaaddlwpe --> MULTINATIONAL, then ppsdkdkfww --> ?" (just made up shit, but you get the drill), or "here's a set of hiring parameters, now here's a guy--should we hire/reject/refer him to manager", "mr brown owns a dog and walks on Fridays, Mr Pink has a Blue house, who drives the Chevy?" etc etc etc
Anyway after that work sim, I get into the coding questions which are on an entirely different platform called AMCAT, and questions are Java/C only despite them saying "we don't care about what language experience you have, we just want to see you can code!" in the multiple promotional workplace videos they force you to watch before the exam. You also aren't allowed to reference anything besides the Java/C docs (makes sense I suppose).
Well I get auto-kicked out of the system for pressing print screen even though my hand was never even close to the key. Turns out their stupid AMCAT system also needs user/pass credentials to get in normally, but their system for this test sends you straight from the work sim to the AMCAT fucktard system without creds, so I have no way of getting in.
Talked first to their contracted-out third-party support who have no clue about anything--they're just paid to sit and watch me for 3+ hours. Then I talk to the AMCAT supprot but they have no idea either and are incapable of communication besides rattling off FAQ shit, making me repeat myself for 30 minutes before finally telling me "ya we have no idea what to do".
Heard from an friend who interned there this summer that most teams are not really hiring new grads who didn't intern for them this hiring round anyway, and that they've been trying to get this system to work rather than have people come onsite. So I was probably always just a guinea pig and they never had much intention of hiring me, just wanted to test the system on some people.
Oh yeah and the entire time you have the proctor clown watching everything you do and make sure you show them the entire room whenever a millisecond of static or a fly fart is heard over the mic.
So I have wasted a nontrivial number of hours of my life interviewing for this garbage company while juggling other interviews, dealing with things in my life, school, what have you, and Amazon gets a free data point for their shitty system.
FUCK YOU AMAZON
/rant
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lol the proctor was just sitting there watching you try to troubleshoot these problems with their system? that's hilarious
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So the proctor was through an external system called ProctorU which, it seems, usually is used by universities. So upon asking him if he could do anything, he told me "nah we're just hired to watch you do all this shit, talk to Amazon about that separate AMCAT system or whatever it's called". So I did, and turns out non-customer Amazon support is a trash can fire.
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Amazon most certainly does hire new grads who didn't intern with them. They also interview a *lot* of people on site.
But yea Amazon runs way too fast and loose with their hiring systems.
If you're in the area, Microsoft, Google, Facebook, Tableau, etc are all hiring...
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Ah gotcha. I don't know anybody here in California who got an offer and who went on-site, so maybe it's just on-sites for more senior SDEs and people who live in Washington, or I was just unlucky.
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It could easily be just unlucky. Does sound like this new system has... problems.
I would advocate shotgun approach and apply to many places (if you have the time).
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Yeah, normally I've applied to a ton of places for internships (100% agree that it's a numbers game). Now that I'm a soon-to-be new grad, though, I have a return offer from the company at which I interned this summer; I really like the offer so I've only been applying to really cool places where I'd be interested in working/prestigious places.
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is David Flanagan's JavaScript: The Definitive Guide a good place to start for JS?
i feel i should start with pure JS instead of going straight to JQuery/AngularJS.
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