The 2nd Monitor - 2015-12-22 (page 1 of 4)

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12:00 AM

RELOAD! There are 1626 unanswered questions (94.5412% answered)

@TopinFrassi It still says Tomorrow. Wait at least until it says a number of hours left.

Quill - HAT MANIAC

sure -> ask here

:26354235 If it works, that's what we are here for.

What's the question?

I'll just post a question... I didn't realize you could post the whole program on this SE

OK, @TopinFrassi, it says 23 hours. Just do it before it runs out now.

Yep. Site laws - whole programs welcome.

Quill - HAT MANIAC

12:09 AM

@ekaj yeah, some people even post like 60kb of code!

2

No minimal examples.

Evening :)

@JeroenVannevel any chance you visit FOSDEM 2015?

Jeroen Vannevel

Depends

is it a brothel?

:D

www.fosdem.org

archive.fosdem.org/2015

Jeroen Vannevel

12:13 AM

That actually looks quite interesting

It is.

I always come home with my bags filled with goodies :D

Jeroen Vannevel

and at that moment I am just graduated and not yet at work again

I'll keep it in the back of my mind

But there are some interesting talks and they have a track about testing, which I believe is your domain?

+ it's completely free

Jeroen Vannevel

Yeah I do like testing although now I'm more interested in language design and compilers

Or IoT

I like refactorings and code manipulations.

I'll probably end up as a meta-programmer.

Jeroen Vannevel

12:15 AM

Seems like there's plenty in there for everyone -- I'll put serious consideration in it

Well I'm mainly gonna go for the Python track and big data track

Jeroen Vannevel

remind me every now and then if you can

I will.

After building a small-C compiler for a course, I kinda have had it with compilers.

@JeroenVannevel Should I ask @SimonForsbergMcFeely to have @Duga ping you with the link every day?

haha, that must be some overkill :p

Captain Obvious

12:18 AM

0

Q: Tips on this script to automate a Wordpress install?

I do not have a whole lot to do over winter break, so I wrote this little script to automate a Wordpress install (currently can only install once instance) on a fresh Debian server (tested, working with Wheezy). It may be pretty sloppy because it's the first thing I've actually tried, but it's a ...

Jeroen Vannevel

I've got this amazing chrome extension

Snooze

You can snooze tabs for a few different amounts of times

and it will wake it up again after that

I set that page to re-appear every saturday at 18:00

That's quite handy.

Jeroen Vannevel

Try it out -- you too @skiwi -- it's really useful

now I have a lot less tabs hanging around

and I won't lose them due to reboots

I should switch to chrome :/

@DJanssens Try Dragon. It can run Chrome extensions, but is nicer.

12:20 AM

I also need the doge plugin/extension that (I forgot who) lately showed

Quill - HAT MANIAC

EthanBierlein showed you

@DJanssens google chrome canary

Right, thanks @Quill-HATMANIAC

@Hosch250 can you link it, googling dragon is not that effective :D

Quill - HAT MANIAC

lol

Comodo Dragon: comodo.com/home/browsers-toolbars/browser.php

I use their IceDragon browser, which runs FF extensions.

@Quill-HATMANIAC canary seems like the newest browser of Chrome (beta?)

Quill - HAT MANIAC

12:23 AM

Developer build, I guess

It's good for web devs because it gets the latest ES* progress

@SirPython my final examplar is currently broken, but the rest stands. I'm scrambling for a fix, should be a few minutes

@Quill-HATMANIAC I understand. Take your time, you still have my vote.

Quill - HAT MANIAC

there we go, fixed

wow

also everyone saw the Choose your own swag meta post, yeah?

@DJanssens It's basically their daily build running through some CI and continuous deploy

Quill - HAT MANIAC

12:38 AM

yep it pretty much always says update at restart program

Cool. I was not aware of its existence

Is it impolite to remind an OP of the voting feature if they accepted an answer but did not cast a vote?

Quill - HAT MANIAC

(sometimes they may not have rep reqs)

and I'd say yes

it'd get naruto'd and end up here anyway

1:02 AM

For anyone who's interested, SpaceX launches in 30 minutes: spacex.com/webcast

T minus 20 minutes...

1:21 AM

T minus 10 minutes...

Quill - HAT MANIAC

try 7

possible answer invalidation by Oybek Kamolov on question by Oybek Kamolov: codereview.stackexchange.com/posts/114680/revisions

@Duga Added single comment, seems okay.

T minus 5...

f#-is-magic

Liftoff!

Quill - HAT MANIAC

1:30 AM

wow, that was cool. Thanks @zak

That thing is a fireball.

Quill - HAT MANIAC

well at 6k km/h

user image

Glad to be of service :)

Moment of truth in 4 minutes. If they re-land it, that's the revolution right there.

Quill - HAT MANIAC

they're trying to reland it?

This is attempt #3 (or 4) I think

1:37 AM

Guys, Tail Recursion in F# is pretty slick.

Sure, but not quite as cool as ROCKETS!

Quill - HAT MANIAC

@EBrown can you give an example :-)

let factorial x =
    // Keep track of both x and an accumulator value (acc)
    let rec tailRecursiveFactorial x acc =
        if x <= 1 then
            acc
        else
            tailRecursiveFactorial (x - 1) (acc * x)
    tailRecursiveFactorial x 1

This was the previous attempt to re-land the falcon 9:

CRS-6 First Stage Landing

That's F#, which when compiled and examined turns into the following C#:

public static int tailRecursiveFactorial (int x, int acc)
{
    while (true)
    {
        int num = x;
        if (num <= 1)
        {
            return acc;
        }
        acc *= x;
        x--;
    }
}

1:39 AM

landing now

See: blogs.msdn.com/b/chrsmith/archive/2008/08/07/…

Basically, the entire F# is rewritten into a loop body.

They did it.

FALCON 9 HAS LANDED!

wow that's ... nice..

It's a heavily optimized tail recursion example, but I think it's pretty cool.

1:41 AM

Is SpaceX the first group of people to do this?

Nobody has ever done this.

It's impossible to overstate how huge it is.

Basically, it costs about the same to build a rocket as to build a Boeing 747

Yet, a 747 will fly thousands of times, so you can buy a ticket for $20

Whereas (until today), a rocket flies just once, so a ticket costs $100 Million

If you can re-use a rocket, and you just have to re-fuel it each time.

Then you can (reasonably) expect to get into space for 1/100th of the cost.

Quill - HAT MANIAC

except the top half breaks off

your logic isn't 100%

The bottom part is the part that landed

That's amazing.

Quill - HAT MANIAC

does the top half contain the satellites?

1:46 AM

Yep.

Quill - HAT MANIAC

interesting interesting

should be interesting to see this hit the news in 32~ hours

user image

lol

Stage 1 is that *huge* Orange fuel tank / rockets

That just might have been photoshopped

Quill - HAT MANIAC

1:47 AM

probably

Stage 2 is the shuttle.

Shuttle was re-usable. Stage 1 was not.

@HATMAN Maybe, just a little :)

Quill - HAT MANIAC

well stage 1 contained the shuttles to be deployed didn't it?

Stage 1 is a massive fuel tank attached to some number of rocket engines

For the falcon 9, 9 engines

Stage 2 is a (much) smaller fuel tank, with a single engine, and a payload at the very top.

Total mission success :)

yes, quite exciting!

"the goal is Mars, because *nobody* wants to go back to Jakku" - awesome sign off.

1:50 AM

lol

OH WHAT

@EBrown Did you miss the excitement?

In f# bigint is only restricted by the users memory size.

@Zak No, I'm actually on-topic (for once).

2

That is a fair point.

I thought bigint was a static 64-bytes, but apparently I was wrong.

2:02 AM

Seems like a good excuse to join Space Exploration

0

Q: Roughly what percentage (by cost) of a Rocket Launch does stage 1 of the Falcon 9 Rocket represent?

As of a short time ago, SpaceX made history as the first entity *ever* to successfully re-land the initial stage of an orbital rocket. Up until this point, the dominating factor in the cost of Rocket Launches has been that you have to build a new Rocket for every launch (roughly equivalent in co...

rockets spacex landing cost cost-to-orbit

Quill - HAT MANIAC

in Tavern on the Meta on Meta Stack Exchange Chat, 3 mins ago, by Andrew T.

I'll help it enter the HNQ :P

in Tavern on the Meta on Meta Stack Exchange Chat, 2 mins ago, by Andrew T.

(It's an interesting question though for me)

gotta share the love around different chat rooms you know :-)

2:42 AM

Edward, is that an NPN or PNP transistor in your avatar? And why do you have that?

/me just being nosy...

Truly awe-inspring:

user image

(That's launch and successful landing)

@holroy NPN. Glad too, to see that others are excited about the SpaceX accomplishment.

I'd love to see video of the landing.

@Edward It's all over youtube.

@Zak Whoa!

Wasn't they second? I vaguely remember some other firm claiming to be the first a few weeks ago

2:45 AM

LIVE: SpaceX Falcon 9 rocket launches 11 Orbcomm satellites

The reason I have an NPN transistor is that, like me, it's old but useful. :)

LOL

@holroy Timeline goes something like this:

Hmm... I should possibly find something ancient then like a punch card...

2-3 years ago, SpaceX builds a "small" experimental rocket which goes to edge of space and successfully re-lands several times

couple of Months ago, Blue Origin launches a "small" rocket to just-past the edge of space and hails it as some huge, unprecedented achievement.

2:47 AM

lol

Exactly

Compared to a fully-fledged orbital rocket, those 2 are playthings.

The name "Grasshopper" sums it up pretty perfectly IMO

@JeffBezos Not quite "rarest". SpaceX Grasshopper rocket did 6 suborbital flights 3 years ago & is still around. https://t.co/6j9ERKCNZl

Tweeted by elonmusk on November 24, 2015 at 4:41 PM in reply to JeffBezos

I'm seriously not trying to start a flame war of sorts, but it could be the Blue Origin I read about. But are you saying that the '"small" experimental rocket' from SpaceX was up several years ago, and that is similar to the Blue Origin thingy?

Pretty much.

OK... Thanks for the info... I've just read both of them rather quickly...

Blue origin *technically* went into space, by a fraction, whereas SpaceX technically didn't.

Except SpaceX did it 3 years ago.

2:53 AM

I guess a lot of this is marketing at its best.

Pretty much.

yeah

Not just marketing. It's a pretty impressive accomplishment.

Now what happened today, that really *was* huge

But according to the little I've read it seems like the SpaceX Falcon9 is the most useful of them for doing heavy stuff, whilst the Blue Origin seems more like a space tourist venture. Yet again, I've not read that much on this.

2:56 AM

I tend to think that every successful mission to space and back is pretty impressive. But yes, the SpaceX flight launched 11 satellites, so it's kind of the "space truck" that the shuttle never really was.

Captain Obvious

2

Q: Let's Iterator trough Fibonacci

Follow-up to my [previous question], this class is now based on an iterator. The class, instead of forcing the programmer to use up a bunch of memory just to get each progressive number once, they can now use an iterator. The class itself is also now based on an iterator, which makes my life easi...

java fibonacci-sequence

@holroy Blue Origin is trying to get there form the ground up (sub-orbital flight --> developing a new rocket engine for the ULA --> who knows?)

Whereas SpaceX is just going straight at it (Build a fully-fledged launch vehicle --> get paid to take stuff to space --> Use said funding to develop a re-usable rocket)

Blue origin is safer. SpaceX (was) much more of a gamble.

After their first 3 launches blew up, they literally had to either have a successful launch, or the company was bankrupt. That was back in 2010.

They've had, what 20+ launches now, right?

Yep.

I think today was #21 (but don't quote me on that)

Oopss... Just did: Zak says it was #21! :-)

3:01 AM

My recollection is 4 launch disasters, but I'm not sure about that.

This question is probably better suited for: codereview.stackexchange.com — Sam 59 secs ago

(Googling now...)

Hmm... 23 completed missions...

At the start: 3 failures followed by succes on #4. Followed by (I think) 18/19 successful missions) Then failure in June, and back to success today.

@holroy There we go, #4-#21 = 18 successful launches

Naturally, Wikipedia has a timeline:

List of Falcon 9 and Falcon Heavy launches

This is a list of missions, historic and planned, for the SpaceX Falcon 9 family of launch vehicles. The four versions of the rocket are the Falcon 9 v1.0 (now retired), currently-operational Falcon 9 v1.1, and the in-development Falcon Heavy and Falcon 9-R. == Notable missions == === Maiden launch === The Falcon 9 maiden launch occurred on June 4, 2010 and was deemed a success, placing the test payload within 1 percent of the intended orbit. The second stage engine performed a short second burn to demonstrate its multiple firing capability. The rocket experienced, "a little bit of rol...

3:04 AM

Wikipedia says that today was no 20: en.wikipedia.org/wiki/…

That would be for the Falcon 9

That's just the big rocket launches. They had earlier ones.

First few launches were an earlier version.

"Falcon 1 made five flights in 2006–2009. On 28 September 2008, the Falcon 1 succeeded in reaching orbit on its fourth attempt, becoming the first privately funded, liquid-fueled rocket to do so."

Pretty good graphic showing the difference:

user image

or not...

Quill - HAT MANIAC

3:07 AM

That's falcon 1 on the far left...

There it is! :)

So can it jump to hyperspace like the Millennium Falcon?

(Just watched the new Star Wars movie this evening)

Quill - HAT MANIAC

Thoughts?

Roughly the same size as GrassHopper and Blue Origin's rocket (I think called New shepherd?)

Quill - HAT MANIAC

Yo @DanPantry, you around?

@Edward I hardly doubt it! :-D

3:10 AM

As you can see. Landing that, and landing the Falcon 9 are 2 *entirely* different levels of achievement

I've got to get to a cinema soon and see the new one...

@holroy Yes, you do!

It's great fun. I remember seeing the first one 38 years ago.

@Quill-HATMANIAC IMO, if there were no prequels, I would've thought "This is solidly cool, but nothing extraordinary". Given the comparison to the prequels, and the effects of nostalgia, it felt awesome (Even if the plot became *very* predictable by about a third of the way through)

@Zak That's fair.

Quill - HAT MANIAC

3:13 AM

Apparently JJ Abrams isn't doing the next one

Michael Bay is doing the next one.

@Edward Not sure if good thing or bad thing.

(just kidding. Ow! Stop throwing things at me!)

Oh, phew!

Still, if they're going to keep making *even bigger* super weapons, they might just need his flair for the overly-excessive

I did like that the characters felt far more fleshed out though.

I wonder if any of the defense contractors said, "You know, we could also build a whole bunch of smaller weapons for half the cost."

@Zak I think that's mostly your memory filling in the blanks.

Not much in that department happened on screen if you think about it.

But don't listen to me -- it's just the popcorn talking

3:17 AM

Sure, but it was enough for people to actually seem like actual people, rather than a collection of stereotypes.

Quill - HAT MANIAC

the climatic scene at the end was pretty risky too

Like what's his name, Kylo Ren. Actually has a personality. Relationshhip with the overall-master: seems like an actual mentorship.

@Zak Yes, that's true. More true of this one than some of the recent movies and in that regard more like the first two IMHO.

Plus, I liked stormtroopers having some personality too :)

Just in the poorly run units.

:)

3:21 AM

codereview.stackexchange.com for working code. — Ron Beyer 42 secs ago

@Duga for the win!

Hmmm. Falcon 9 uses Linux as its operating system...

Quill - HAT MANIAC

yeah, some of the bigger companies make specialised distros for big projects like that

For example: Large Hadron Collider Memory storage runs on a specialised Linux Distro

Just a simple subroutine call, right? launch and return.

I propose launch && return

Quill - HAT MANIAC

3:27 AM

var rocket = new Falcon9();
rocket.launch(function(){
    rocket.onload = function(){
        this.satellites.release();
    }
}, function(){
    this.return();
};

There needs to be a refuel() member function.

Nah... Not javascript... Linux -> Bash! :)

Quill - HAT MANIAC

actually just runs on JavaScript

IE8 compliant even

What about whiteSPACE

Is that a viable language?

@Quill-HATMANIAC That's how the first three blew up...

3:29 AM

@holroy *Groans*, *begrudgingly upvotes*

Quill - HAT MANIAC

s/upvotes/stars

Probably runs on C++, these days everything does

Even jQuery is written in C++

That is kind of sad, even though it most likely is the truth. I'm not extremely fond of C++

I find it quite useful, but have spent a lot of time getting there.

It's easy to shoot yourself in the foot with C++.

(for the record, I recommend against that.)

To me C++ is the ugly bastard son of C. You can do whatever in it, but it'll never look good!

Quill - HAT MANIAC

well that's harsh

3:35 AM

@holroy What's your preferred language?

I've seen too much of it... Sorry, if it seems harsh

@Edward You just reminded me of this: Shooting yourself in the foot in different programming lnguages

I'm kind of multi-lingual, so it kind of depends on the task at hand.

Quill - HAT MANIAC

2 days ago, by RubberDuck

Relevant reading. http://blog.aurynn.com/86/contempt-culture

^ pls no hate on languages

"C++
You accidently create a dozen instances of yourself and shoot them all in the foot. Providing emergency medical assistance is impossible since you can't tell which are bitwise copies and which are just pointing at others and saying "That's me, over there."

3:36 AM

But I kind of like C#, and recently grown a little fond of Python for some stuff.

@Quill-HATMANIAC good morning

wtf @Zak it's 3am go to bed

@holroy I'm not a Microsoft captive and so haven't really looked much at C#. Python is useful for a lot of things, but neither of those is very good for embedded systems where I spend my time.

Quill - HAT MANIAC

Good morning

@DanPantry Look who's talking ^^

I just woke up :( @Zak

3:38 AM

But seriously, ROCKETS! how could I possibly not stay up for that.

3

In the C'ish world, C# is the clear favorite. I haven't touched embedded system in quite a while, but I do believe I would prefer pure C rather than C++, if that had been an option. But I do suspect that most of the libraries are written in C++ so you have to use them.

@Zak I even watched the CRS-4 launches (both scrubbed attempts and then the actual launch)

I'm not a fan of Microsoft either, but they have actually done some good stuff in C#. Cleaned up the language a bit!

@RonBeyer This is not the actual code. I just created an example of the issue I'm running into with my current project. So, I don't think can I post it at code review.. :) — user3587180 16 secs ago

"Java
You locate the Gun class, but discover that the Bullet class is abstract, so you extend it and write the missing part of the implementation. Then you implement the ShootAble interface for your foot, and recompile the Foot class. The interface lets the bullet call the doDamage method on the Foot , so the Foot can damage itself in the most effective way. Now you run the program, and call the doShoot method on the instance of the Gun class. First the Gun creates an instance of Bullet , which calls the doFire method on the Gun . The Gun calls the hit(Bullet) method on the Foot , and the i…

This stuff is gold ^^

3:40 AM

something something Kingdom of nouns

@user3587180 feel free to post your actual working code over at Code Review, I'm sure you'll get the kind of answers you're looking for. — Mat's Mug 50 secs ago

it's 3.42am, I have work later on today, and I'm dying my hair. Adult 101.

@DanPantry Cool, what colour(s)?

Also, my last day of work before the newyear :)

@Zak navy blue

I am in work until thursday, but my boss isn't

Cool. Dying my hair is on my list of "Things to do when I'm either a) unemployed, b) back at university or c) so irreplacable at my job that I don't care what they think"

3:47 AM

@Zak :At point c) you won't any longer have hair.

Quill - HAT MANIAC

@Zak haha, same here

@Edward lol

good point

Oh, I forgot d) working at a tech company who couldn't give a crap what you look like

@Zak I've only experienced a), b) and d). YMMV.

I've had long hair, short hair and no hair. Long hair is just too much work.

^^^

3:52 AM

yeah

I used to have fairly long hair. Now I keep it as short as you see in my photo because it 1) suits me 2) makes it easier for people to take me seriously and 3) I can get away with not having a shower some days...

@DanPantry Mine's a little shorter than that, but I make up for it with a mustache and beard.

I know, it's hard to tell on a transistor.

lol

oh, cool, vine uses html5 video players now

Hmm. Weren't they using Flash before?

Yep.

3:56 AM

DEATH TO FLASH!!!

I only noticed because Vine actually works on my linux box now (which doesn't have flash installed)

Quill - HAT MANIAC

I have somewhat long hair now, like my photo but down to my chin on both sides

That's how long mine used to be

I might be able to find an old photo..

Found it...

user image

3-4 years ago. I still have a nice jaw.

Though this was right after my braces came off, which is why you can actually see my smile in this photo

Quill - HAT MANIAC

nice

Though it was just too much work to keep hair that long while going to work every day.. I'd have to straighten it every morning, getting ready would take an hour

4:08 AM

I have super short hair.

Yeah, that's a bit too short for me to be comfortable with having @EBrown

I have a long face so longer hair helps

Quill - HAT MANIAC

should've gone for the ponytail @danpantry :p

@Quill-HATMANIAC This was before ponytails and manbuns were socially acceptable. Get off my lawn.

Quill - HAT MANIAC

back in the days where My Chemical Romance was popular :P

I just got the Enthusiast badge. :D

I'm not sure how to caption this.

2

Quill - HAT MANIAC

4:13 AM

SFW?

I wouldn't post NSFW ~~in this chat room~~

@DanPantry XD

@DanPantry Your pre-edit text kind of made me wonder in which chat room you would post it... :-)

Quill - HAT MANIAC

wow lol

How to make friends and weird out your other friends

a novel, by me

4:16 AM

I find your lack of faith .. disturbing.

s/faith/christmas cheer

I only just joined Space Exploration and I already have 3 answers ^^

@Zak I feel that if I joined that SE all of my answers would be quotes from the Space Sphere from Portal..

All of my answers on SE would be utter nonsense. In other words, just like here.

Atmosphere. Black holes. Astronauts. Nebulas. Jupiter. The Big Dipper. THE BIG DIPPER.

Quill - HAT MANIAC

4:21 AM

why is a wav file in an img folder...

@Quill-HATMANIAC I have no idea :\

Quill - HAT MANIAC

I'm voting to close this question as off-topic because this belongs on Code Review. — Aron 16 secs ago

@Aron, Please read a Guide to Code Review for Stack Overflow users. There is no code to review here, and is not close to begin on-topic at Code Review. — holroy 5 secs ago

4:42 AM

@DanPantry I keep mine ultra short.

Captain Obvious

4:56 AM

0

Q: String parsing and saving ipaddress to file in Java

Following function will parse resp string, which will be like shown in following example. I will get ipaddress as in form of hexadecimal string like "C0A2AA32" and I need to covert that string and save it to file. resp example : "This is just a string with ip="2342A022" now I need to parse it" ...

java parsing file

I just took 974/1000 in my writing class - the one I was most worried about! Go me!

I had to get 950 to get an A.

Quill - HAT MANIAC

nice work!

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Transcript for

Dec '1522

The 2nd Monitor

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