The 2nd Monitor

@Koveras - true story. My 10 year old is learning the piano. Her music teacher gave her 'homework'. The theme for an upcoming concert was 'Canadian Music'.

Koveras

And by questioned i mean they accused me of selling my kids to the zoo

syb0rg

lol

Jamal

8:18 PM

wut

rolfl

Her homework was to find out a little bit about the composer of her song, and prepare a little talk.

We left her alone for about 30 minutes on the computer.

skiwi

2

Q: Java 8 streams - each step in the chain evaluated for entire input or do items get passed through?

Say if I have this trivial program List<String> input = Arrays.asList("1", "2", "3"); List<String> result = input.stream() .map(x -> x + " " + x) .filter(y -> !y.startsWith("1")) .collect(Collectors.toList()); Behind the scenes does it work like a) o...

I'm suprirsed the cod ein my answer there works ;)

Simon André Forsberg

Selling kids to the zoo? Religious fight? Was it a religious zoo?

rolfl

Her speech she prepared was: so and so wrote this song in 1998, when they were a student at such and such. They now live at 1234 this street in this town.

Koveras

Whoa

I know enough about reality to not put my address out there at least

syb0rg

8:20 PM

Anonymity is bliss.

Simon André Forsberg

@syb0rg Easy for you to say, you're half robot.

Koveras

But if someone knows your real name and state, and they are determined enough to destroy your internet persona, even with just that information they could find you

Well, maybe not but I wouldn't be surprised

Oh and @Simon, it wasn't even a "fight" - it was "wow you're a Christian you are a terrible person"

But much worse words were used

Anyways it freaked me out enough that I've been on a crusade to change all my usernames since

Especially once they mentioned my kids

Simon André Forsberg

lol, most Christians I have met are very nice persons. Heck, I am one myself lol

Koveras

I'm with you but some people are a bit intolerant

rolfl

^^^^^ truth is, most (christian|muslim|.*) people I have met are really nice.

Koveras

8:24 PM

What's funny is they tend to accuse Christians of being the intolerant ones, then destroy them because of their religion

Simon André Forsberg

Yup. Luckily I don't often meet those intolerant ones

I agree with monkey, I met many nice muslims as well

Koveras

That's because you stay in here where it's safe

Most chat rooms aren't like this one :)

rolfl

Hmmm... let's nip this one in the bud.

Jamal

@SimonAndréForsberg I actually am one. ;-)

rolfl

@Koveras CodeReview requires a certain amount of tact.

Simon André Forsberg

8:26 PM

@Jamal Nice person, Christian or Muslim?

rolfl

How to tell a person their code is crap, and make them smile about it.

Jamal

@SimonAndréForsberg Muslim

rolfl

Oh, whew, I thought you were going to say 'Nice Guy'.

Koveras

hah

rolfl

I am 'the nice guy', is says so in my profile

Jamal

8:27 PM

Kind guy, yes. Nice Guy(TM), nope.

Koveras

Oh I thought we were questioning Jamal's gender

rolfl

Nah, that's Syb0rg.

So, about that weather we're having ..... ?

Koveras

That would be difficult to discuss to any degree of accuracy due to not knowing one another's locations

rolfl

How about you tell us where you live ...? ;-)

Koveras

How about I tell you where I'd like to live

rolfl

8:30 PM

Works for me.

Koveras

I don't even konw, somewhere that doesn't have many natural disasters

Simon André Forsberg

@Jamal Nice. I actually read a bit in The Holy Quran last year, wanted to get a bit more acquainted with Islamic religion.

Koveras

Which pretty much rules out everything

Simon André Forsberg

Inter-religious dialog FTW.

Koveras

Montana?

rolfl

8:30 PM

Central Canada ....

Koveras

It'd be cool to be like an isolated hillbilly with some land or something

Too cold in Canada

rolfl

Although, it is still 'rebounding' from the last Ice-Age.

Jamal

@SimonAndréForsberg The sad part is, I don't know any Arabic...

Simon André Forsberg

@Jamal Neither do I, I read an Arabic with English translation one :)

Koveras

People usually say they wish they could live in Hawaii or something but that would not be a very wise choice IMO

Due to tsunamis, volcanoes, godzillas and what not

I wish I lived in space

rolfl

8:33 PM

And you don;t think the disasters there are a problem?

Watched Gravity recently.... ;-)

Koveras

What disasteres

Oh I dunno what that is

rolfl

imdb.com/title/tt1454468/?ref_=fn_al_tt_1

Koveras

Hmmm, I have a better idea: en.wikipedia.org/wiki/Sharknado

By the way, can I just call you ralph? rolfl kinda screws with my dyslexia.

Simon André Forsberg

But his name is Rolf.

You can always call him monkey.

And give him a banana, he likes that.

Koveras

rolf is weird to spell too.

rolfl

8:39 PM

Call me what you like ... but don't call me late for dinner.

Also, if you type @r and hit tab, it will autocomplete.

And, it seems like 'monkey', or 'the monkey' , is the nick-name I have 'earned' in here.

As they say, 'that's what my friends call me'.... so, go ahead and call me the monkey ;-)

Koveras

Anyone know where my name comes from?

Without cheating

Simon André Forsberg

Never heard it before I think

Koveras

Anyone who was a PC gamer in the late 90's

?

Simon André Forsberg

well, yes... a bit at least. Apparently never played that game

Koveras

RPGs much?

Simon André Forsberg

8:47 PM

not many. Although I was a member of the old RPGMaker.net community

Koveras

Well some would say you missed a golden era there but I dunno. All video games suck depending on how you look at it.

Which is why I so badly want to make one, so people can complain about it ad infinitum

Hullo @200_success

200_success

@Koveras Hi. Welcome to CR.

Koveras

Aren't I supposed to say that

rolfl

For what it's worth, I read your new name as "cover ass". ... ;-)

Koveras

hehe

200_success

8:53 PM

Oh, name changed. I see.

Koveras

Yes, you may know me better as Jamal

2

What is temporal coupling?

amon

@Koveras when functions in an API have to be called in a specific order

rolfl

And when it is not done right, you have a temporal anomaly

amon

For example: file = new File(); file.write("foo"); file.close(). The close cannot come before the write

Koveras

Ah thanks

rolfl

8:58 PM

It can, but then it does not work.

Koveras

Is that bad then? How else would you do a file operation

amon

nifty type systems, or constructs like try-with-resource can hide this coupling

Koveras

I don't know what either of those things are

Oh okay the second thing is from Java

nifty type in Google doesn't provide much info though

amon

yes. “nifty” isn't a name, it just means “clever”. Here: “too clever for its own good”

Koveras

Oh you're being facetious

amon

9:05 PM

this is chat, what do you expect? ;-)

Koveras

Are you saying it's not necessarily a bad thing then?

rolfl

I don't really expect people to use the word facetious in the right context, in appropriate circumstances, and spelled right ... that's for sure.

Koveras

@rolfl did I get it right?

amon

Well, leveraging the type system is often useful, e.g. when writing a “fluent API”. But in this example of file IO, I wouldn't want a type-system based solution, except maybe in Haskell

rolfl

dictionary.reference.com/browse/facetious

amon

9:07 PM

but temporal coupling itself is definitively an antipattern

rolfl

> lacking serious intent; concerned with something nonessential, amusing, or frivolous: a facetious person

You got it right.

Koveras

You gotta spell these things out for me, I'm pretty thick

rolfl

@amon temporal coupling must mean something I am not familiar with.

The example you gave is happens-before type things, which all programs are about.

amon

@rolfl my example was about an illegal state, not about about changing state itself. But you may be right that I am not describing the correct term. Wikipedia says this:

Koveras

You're being faschicious

amon

9:10 PM

> When two actions are bundled together into one module just because they happen to occur at the same time.

Simon André Forsberg

So a real temporal coupling would be to have a method with both opens, writes, and closes the file? (and only that)

amon

I think this blog post describes it better than me: blog.ploeh.dk/2011/05/24/DesignSmellTemporalCoupling

rolfl

Yeah, Iw as reading that one.

Koveras

That's factitious

rolfl

The Java JDBC API strikes me as being a good example of bad temporal coupling.

Class.forName("com.mysql.jdbc.Driver"); ... ;-)

Or even autocommit, etc.

amon

9:17 PM

@rolfl that's not temporal coupling, that looks like dependency injection

ChrisW

9:34 PM

Wikipedia says temporal coupling is "... just because they happen to occur at the same time."

Jamal

@rolfl: I've posted a Java answer. Please let me know if something's not quite Java-like.

0

A: Determine total number of ways of reaching a destination

Although this is not related to optimization, it looks like you could replace some while loops with for loops. If you're using a counter, chances are you should use the latter type of loop. First, I want to mention that you should use whitespace between operators and keywords for readability. ...

Particularly the second code block.

rolfl

9:51 PM

Not Java-like : Brace goes at line-end ;-)

if (condition) {  // <<< brace at end

@Jamal - ding.

palacsint

google-styleguide.googlecode.com/svn/trunk/… ;-)

rolfl

Also, I figure the code is broken.

I am busy trying to get a JDOM release out, but I saw that question, and thought "how does that compile".

Jamal

@rolfl Where in my code do I make changes? I'm not using an if.

rolfl

All your loops:

for (int i = 1; i <= n; i++)
{

becomes

for (int i = 1; i <= n; i++) {

Jamal

Ah, I see. Okay.

rolfl

9:56 PM

@palacsint what do you think of this line:

 ways[i++] = (short)(getWays(stationId)%(10^9 +7));

Jamal

I'll fix that, along with referencing palacsint's link.

rolfl

Do you think Java is doing an implicit cast of the 10^9 to a long?

palacsint

@rolfl I don't think so... it smells :)

ehh

Simon André Forsberg

@rolfl I think the 10^9 becomes 3

palacsint

xor...

Simon André Forsberg

10:00 PM

yup

So that's ways[i++] = (short)(getWays(stationId) % 10);

palacsint

first I've found the loop too simple

rolfl

Yeah, it is horrible.

palacsint

it should be similar to JD's graphAllPath solution I guess

rolfl

duh, feeling pretty dumb right about now.

Amazing how some broken context makes you thing a certain way.... like, in what world is ^ a power operator in Java.

2

Jamal

@rolfl I should've noticed that as well. :-)

Simon André Forsberg

10:07 PM

Has the monkey learned something new or had he just totally forgotten about it?

rolfl

So, @Jamal - in your first edit.... you changed the text description .... the answer mod 10^9 +7. to be .... the answer mod 10<sup>9</sup> +7 .... are you sure that was the right thing to do?

@SimonAndréForsberg - I saw the description saying 10 to power 9 and immediately thought 'overflow' From that point on I was expecting to see power operator, and, it does exist somewhere in my past as the caret ^

Jamal

@rolfl I'm not entirely sure. Go ahead and change it back if I'm wrong.

Simon André Forsberg

The OP probably meant it as 10 to the power of 9 and wasn't aware of ^ being XOR in many programming languages.

Jamal

That must be it.

200_success

@Jamal If you're going to put int testCases on its own line, then why not change the degenerate for loop to while (testCases-- > 0) { … }?

Simon André Forsberg

10:12 PM

Otherwise I believe he would just have said 3 instead of 10^9, if he really meant XOR :)

Jamal

Since I've mentioned my thing, perhaps someone else could point it out.

@200_success I could do that.

Simon André Forsberg

What question are we talking about? :)

rolfl

Clarification: In the description it says: Since the number of ways can be very large output the answer mod xxxx. Is the xxxx 10-to-the-power-of-9-plus-7, or is it 10-xor-9-plus-7 ? — rolfl ♦ 31 secs ago

200_success

3

A: Determine total number of ways of reaching a destination

Although this is not related to optimization, it looks like you could replace some while loops with for loops. If you're using a counter, chances are you should use the latter type of loop. First, I want to mention that you should use whitespace between operators and keywords for readability. ...

ChrisW

^ is exponentiation in Basic and Visual Basic.

Simon André Forsberg

10:16 PM

@ChrisW Precisely why I didn't say all programming languages

I'm not sure which ones do it what way, but I think 'most' use it as XOR

Especially the C inspired ones.

Jamal

10:33 PM

@200_success Answer has been updated (along with some examples).

syb0rg

0

A: Credit card verification: string conversion most optimal?

Things you did well Readability - everything was well organized and spaced neatly. Initializing variables within your for loops/adhering to the C99 standard (which is the minimum you should abide by in my opinion). Marking your function arguments as void when you don't take in any parameters. U...

rolfl

Look at that, all three mods working on one question!

syb0rg

@200_success There is what that simple "strtok is depreciated" answer would have turned into ^^^

Jamal

And it's not us dishing out some punishment. ;-)

Now let's see all three mods answering the question.

rolfl

yesterday, by Simon André Forsberg

How many moderators does it take to close a question? :)

^^^^ the question?

I thought we had to keep that confidential? ;-)

Jamal

10:37 PM

But anyway, with the ^, it seems clear that the OP didn't test this code (and probably threw out the word "optimization").

ChrisW

10:54 PM

(10^9 +7) = 10

So he might have tested it; because the example outputs are less than 10.

200_success

@syb0rg You still seem to be working on it. =)

ChrisW

if getWays is implemented correctly

Jamal

@ChrisW I probably did jump the gun on this one, but it did seem unusual to me. Hopefully we'll be clarified on this, unless it's already determined what was being done.

syb0rg

@200_success Yeah, I made the edit with regards to your comment. I didn't see that implementation at first because of how he wrote it up.

Sham

@200_success i was waiting for my query to be answered, nobody came back, how do u suggest me to proceed? stackoverflow.com/questions/22705945/…

200_success

11:00 PM

@syb0rg What's 3/2 in integer division again?

syb0rg

1

oops

typo in the answer :P

200_success

@Sham To be honest, I don't understand what you're trying to ask either, in parts (1), (2), and (3). I gave you the answer to part (4).

Sham

ok

200_success

This was already a reasonably good visualization:

1

Q: Python memory model for this program

My query is on the below program with respect to symbols that are storing values and functions, when ran on http://pythontutor.com/. My question is: How does python execution model look for above program on memory before start interpreting the python program? How do i visualise that memory l...

python c object

Sham

part(1) function is stored as an object with class 'function' but here in my second query i got the chance to know how where my code is embed it is code attribute

which NPE answered

does this point make sense?

part(1) is already answered

200_success

11:06 PM

@syb0rg Sorry, I had to downvote. You just broke the code by rewriting it without understanding it.

Sham

as i mentioned in the query itself

200_success

prod = prod%10 + prod/(prod%10 + 0.0);

syb0rg

@200_success How does that break it?

It compiled fine. So how does it affect it during runtime.

200_success

I'll just say that the original

prod = prod%10 + prod/prod%10;

was weird but correct.

Sham

In part(2), i would like to know, what is the name of the class member which stores the function code that is passed as an argument?

syb0rg

11:10 PM

@200_success So you are saying to remove the whole int division section?

200_success

Read

Luhn algorithm

The Luhn algorithm or Luhn formula, also known as the "modulus 10" or "mod 10" algorithm, is a simple checksum formula used to validate a variety of identification numbers, such as credit card numbers, IMEI numbers, National Provider Identifier numbers in US and Canadian Social Insurance Numbers. It was created by IBM scientist Hans Peter Luhn and described in [http://www.google.com/patents?id=Y7leAAAAEBAJ U.S. Patent No. 2,950,048], filed on January 6, 1954, and granted on August 23, 1960. The algorithm is in the public domain and is in wide use today. It is specified in ISO/IEC 7812-1. ...

... which you linked to. Try implementing it yourself in C.

@Sham Sorry, I don't follow your question at all. Perhaps you could provide some specific code as an example to discuss?

Sham

>>> def summation(n, term, next):
total, k = 0, 1
while k <= n:
total, k = total + term(k), next(k)
return total

>>> def cube(k):
return pow(k, 3)
>>> def successor(k):
return k + 1
>>> def sum_cubes(n):
return summation(n, cube, successor)
>>> sum_cubes(3)
36

this is there is cs61A text book

in*

above is the example for higherorder function where functions are passed as args

syb0rg

@200_success Fixed, kinda. My implementation is very different from his.

So I removed the section.

Sham

so for summation() function, if i say summation.__code__ i get summation bytecode stored

what about term & next? which attribute bytecode of term & next get stored?

are they just referece variables sharing same byte code that global frame is pointing to?

200_success

@syb0rg Downvote rescinded.

syb0rg

11:22 PM

@200_success Good, thanks. Maybe if you finish reading the rest of the answer, I could earn your upvote ;)

200_success

@syb0rg Are you done editing yet? =)

Simon André Forsberg

So... does anyone want to play TTT Ultimate multiplayer with me? I got a GWT Multiplayer version working

zomis.net/tttnew/multiplayer.html if anyone is interested. Just enter your name and click "Connect"

syb0rg

@200_success I believe so :P

Until you find some other discrepancy

200_success

@Sham I assume that you are asking about __code__ out of pure intellectual curiosity? Because I've never used it for any practical purpose.

Sham

actually am asking such questions because am getting better sense when am writing code where nothing is typed statically in python, am able to visualise my code in a better way, am actually not using this info anywhere practically

200_success

11:27 PM

Give me a few minutes to think about how to present it.

Jamal

11:45 PM

That was a fast downvote and close vote! :D

(on the incoming question)

syb0rg

Well, I supplied the close vote, I'm not sure who supplied the downvote.

Jamal

Looks like this is the same user who posted a now-closed question just today. Is he not understanding?

Simon André Forsberg

He seems to be mixing up SO and CR

Stack Exchange

-2

Q: Code revision - compile error says illegal start of expression

I'm having trouble getting this to compile. I believe it has something to do with my kelly brackets b/c my error says: C:\Users\Pivo\Google Drive\CIT130 - Java\Chapter 6\PP65.java:72: error: illegal start of expression }//end for ^ C:\Users\Pivo\Google Drive\CIT130 - Java\Chapter...

java array

Simon André Forsberg

His CR question is on-topic for SO and his latest SO question is on-topic for CR...

-1

Q: Pass an array of numbers into a method that's overloaded

I'm doing my homework and it says to write a test program that prompts the user to enter ten double values, invokes this method, and displays the average value. I was able to get this program working with an overloaded method... but I'm curious to hear your feedback on where I can improve and wha...

java arrays methods

Jamal

11:49 PM

That's quite some confusion, then.

syb0rg

We do not fix code. We review code. Stack Overflow fixes code. You have posted a question here before that was off-topic for the same reasons as well, with comments telling you this. Please listen to them. — syb0rg 1 min ago

More stern, since this is the second time he has been told.

Jamal

I would edit that, but I usually prefer to not do so for off-topic questions. Seems like a waste since Community will eventually clean up.

Simon André Forsberg

You seem to be mixing up Code Review and Stack Overflow. Your most recent question on SO should have been posted here, and this question should have been on SO. The difference between SO and CR is, once and for all: StackOverflow - I have broken source code: "I tried to do it right, but it's broken, how do I fix it?" CodeReview - I have finished source code: "Now that I've done it, can it be made better?" Please come back here when you have code without errors and that it works as intended. We will gladly help you clean your code up once it is working correctly. — Simon André Forsberg 1 min ago

rolfl

@SimonAndréForsberg - should I flag that SO post for migration to here ... I think I should.

Simon André Forsberg

It's really unfortunate that he's having non-working code, because the code ~~stinks~~ smells

@rolfl Yes, I think you should. That would at least give him some +rep here

else
        //do nothing

Why do people do this, seriously!?

rolfl

11:59 PM

Because then the next line they write will be the else ;-)

Simon André Forsberg

There is his problem btw, missing { } or ;

@rolfl But then the //do nothing would be incorrect.

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