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  • If I define a property to prototype appears in the constructor of object, why?

    - by Eduard Florinescu
    I took the example from this question modified a bit: What is the point of the prototype method? function employee(name,jobtitle,born) { this.name=name; this.jobtitle=jobtitle; this.born=born; this.status="single" } employee.prototype.salary=10000000; var fred=new employee("Fred Flintstone","Caveman",1970); console.log(fred.salary); fred.salary=20000; console.log(fred.salary) And the output in console is this: What is the difference salary is in constructor but I still can access it with fred.salary, how can I see if is in constructor from code, status is still employee property how can I tell for example if name is the one of employee or has been touch by initialization? Why is salary in constructor, when name,jobtitle,born where "touched" by employee("Fred Flintstone","Caveman",1970); «constructor»?

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  • Why don't we use dynamic (server-side generated) CSS?

    - by ern0
    As server-side generated HTML is trivial (and it was the only way to make dynamic webpages before AJAX), server-side generated CSS is not. Actually, I've never seen it. There are CSS compilers, but they generate CSS files which can be used as static. Technically, it requires no special libraries, the HTML style tag should reference to the PHP(/ASP/whatever) templater script instead of the static CSS file, and the script should send out CSS content-type header - that's all. Does it have cache problems? I don't think so. The script should send out no-cache etc. headers. Is it problem for designers? No, they should edit the CSS template (as they edit the HTML template). Why we don't use dynamic CSS generators? Or if there's any, please let me know.

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  • Why are the tags on my site using wordpress being indexed instead of the page?

    - by Bernard
    I can't figure out why my tags are being indexed by google and not my actual posts. So in google, my posts are showing up as mysite.com/tags/post and I of course I want it to look like mysite.com/category/actualpost. Any ideas what could be wrong? My domain is 3 years old and I just started a new focus of an existing site. I can't figure this out! There is no duplicate content, I have a sitemap submitted to webmaster tools and robots.txt...I have everything I need. This is the first time something like this has happened to me. Let me know if anyone has any ideas.

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  • Why isn't Java more widely used for game development?

    - by Anto
    I'm not a game developer or anything, but I know that Java is not very widely used for game development. Java should be fast enough for most games, so where's the catch? I can think of some reasons: Lack of game developers with expertice in Java Lack of good game development frameworks Programmers don't want to accept Java as a games programming language. Most only accept C++ as that? No support for game consoles (though the PC market still exists) It could of course be something else. Could someone who knows the business better than me explain why Java isn't getting momentum when it comes to game development?

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  • Why was Oracle Enterprise Taxation Management renamed to Oracle Enterprise Taxation and Policy Management?

    - by Paula Speranza-Hadley
    Ø       Some of you may wonder why we changed the product name from Oracle Enterpraise Taxation Manament (ETM) to Oracle Enterprise and Policy Management(ETPM).   When Oracle added a limited use license for Oracle Policy Automation to the Oracle Enterprise Taxation Management license, the license was re-named to Oracle Enterprise Taxation and Policy Management.  Ø     When referring to versions 2.2 and prior, the proper name is Oracle Enterprise Taxation Management (ETM) Ø     When referring to versions 2.3 and later, the proper name is Oracle Enterprise and Policy Management (ETPM) Ø     To take advantage of the limited use license for Oracle Policy Automation, customers must transition from the ETM license to the ETPM license.  However, they can remain on their ETM license if they are not going to take advantage of Oracle Policy Automation features.  

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  • Why should we use low level languages if a high level one like python can do almost everything? [closed]

    - by killown
    I know python is not suitable for things like microcontrolers, make drivers etc, but besides that, you can do everything using python, companys get stuck with speed optimizations for real hard time system but does forget other factors which one you can just upgrade your hardware for speed proposes in order to get your python program fit in it, if you think how much cust can the company have to maintain a system written in C, the comparison is like that: for example: 10 programmers to mantain a system written in c and just one programmer to mantain a system written in python, with python you can buy some better hardware to fit your python program, I think that low level languages tend to get more cost, since programmers aren't so cheaply than a hardware upgrade, then, this is my point, why should a system be written in c instead of python?

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  • Why are 2 Adobe Flash Plugin on USC (Ubuntu Software Center)?

    - by LuC1F3R
    As you know in Ubuntu Software Center is 2 times Adobe Flash Plugin. One is called Adobe Flash Plugin and other Adobe Flash Plugin 10. Which of the two to install? Or rather it is the recommended installation methods? If we think well, we can install the Adobe Flash plugin for Firefox from the notification date (Install missing plugin) or walking on the Adobe website and downloading the package .deb. After all, how to properly install Flash Player on Linux Ubuntu? (But my biggg question is why are 2 Adobe Flash Plugin on USC? ...for what? If you click on "More Info", the description are the same for both)

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  • Why I'm getting the same result when deleting target?

    - by XNA
    In the following code we use target in the function: moon.mouseEnabled = false; sky0.addChild(moon); addEventListener(MouseEvent.MOUSE_DOWN, onDrag, false, 0, true); addEventListener(MouseEvent.MOUSE_UP, onDrop, false, 0, true); function onDrag(evt:MouseEvent):void { evt.target.addChild(moon); evt.target.startDrag(); } function onDrop(evt:MouseEvent):void { stopDrag(); } But if I rewrite this code without evt.target it still work. So what is the difference, am I going to get errors later in the run time because I didn't put target? If not then why some use target a lot while it works without it. function onDrag(evt:MouseEvent):void { addChild(moon); startDrag(); }

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  • Why don't computers store decimal numbers as a second whole number?

    - by SomeKittens
    Computers have trouble storing fractional numbers where the denominator is something other than a solution to 2^x. This is because the first digit after the decimal is worth 1/2, the second 1/4 (or 1/(2^1) and 1/(2^2)) etc. Why deal with all sorts of rounding errors when the computer could have just stored the decimal part of the number as another whole number (which is therefore accurate?) The only thing I can think of is dealing with repeating decimals (in base 10), but there could have been an edge solution to that (like we currently have with infinity).

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  • Technically why is processes in Erlang more efficient than OS threads?

    - by Jonas
    Spawning processes seam to be much more efficient in Erlang than starting new threads using the OS (i.e. by using Java or C). Erlang spawns thousands and millions of processes in a short period of time. I know that they are different since Erlang do per process GC and processes in Erlang are implemented the same way on all platforms which isn't the case with OS threads. But I don't fully understand technically why Erlang processes are so much more efficient and has much smaller memory footprint per process. Both the OS and Erlang VM has to do scheduling, context switches and keep track of the values in the registers and so on... Simply why isn't OS threads implemented in the same way as processes in Erlang? Does it have to support something more? and why does it need a bigger memory footprint? Technically why is processes in Erlang more efficient than OS threads? And why can't threads in the OS be implemented and managed in the same efficient way?

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  • Why are part-time jobs in programming an anomality?

    - by Mikle
    I've recently quit my full time developing job at mega-corp, and I decided that I'll look for a part time job. Since then I've talked to half a dozen potential employers, and every one of them had the same reaction when I said the magic words "part-time" - they all closed up and became suspicious. Now, I understand that it might just be me, so as control I asked every one of them what if I were willing to work full time, and they all said I would probably get an offer. My question is two fold: Why, as an employer, would you give up a competent, even great, developer, simply because he wants to work 3 days a week and not 5? How do I sell the story of part time job better? I usually just list my reasons which are that I prefer that balance currently in my life and that I want to work on my own projects, but it leaves them even more suspicious - am I going to start something myself and quit? Am I just lazy?

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  • Should I block bots from my site and why?

    - by Frank E
    My logs are full of bot visitors, often from Eastern Europe and China. The bots are identified as Ahrefs, Seznam, LSSRocketCrawler, Yandex, Sogou and so on. Should I block these bots from my site and why? Which ones have a legitimate purpose in increasing traffic to my site? Many of them are SEO. I have to say I see less traffic if anything since the bots have arrived in large numbers. It would not be too hard to block these since they all admit in their User Agent that they are bots.

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  • Why did an interviewer ask me a question about people eating curry?

    - by Barry
    I had an interview question once which went... Interviewer: "Could you tell me how many people will eat curry for their dinner this evening" Me: "Er, sorry?" Interviewer: "Not the actual number just an estimate" I actually started to stumble my way through it, when I stopped and questioned what it had to do with anything about the job. The interviewer mumbled something and moved on. I guess the question is, what is the point in the ridiculous questions? I just don't understand why they started coming up with these things.

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  • Why some user functions don't get recognised by bash?

    - by strapakowsky
    I can define a function like: myfunction () { ls -R "$1" ; } And then myfunction . just works. But if I do echo "myfunction ." | sh echo "myfunction ." | bash the messages are: sh: myfunction: not found bash: line 1: myfunction: command not found Why? And how can I call a function that comes from a string if not by piping it to sh or bash? I know there is this command source, but I am confused of when I should use source and when sh or bash. Also, I cannot pipe through source. To add to confusion, there is this command . that seems to have nothing to do with the "." that means "current directory".

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  • Why are a seemingly disproportionate amount of programmers just, well, not nice?

    - by Macy Abbey
    Maybe it's just my personal experience, but I associate with varying different groups and types of people and it seems to me that an oddly large percentage of programmers I have encountered are "not nice" or for an attempt at a better definition: Condescending Snarky Negative in the way they talk about people If you have noticed the same thing, any theories as to why? Any suggestions on how to politely or not so politely let one of these programmers know how they are acting and suggest they correct it if they want to be perceived as professional one would want to work with? Or perhaps I've just come across a bad sample and there are bad seeds in every group of people one can name.

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  • Why opening Ubuntu's default wallpaper (warty-final-ubuntu.png) in Image Viewer always fails?

    - by Kush
    Everytime I try to open Ubuntu (any version, since from 8.04 with which I started) default wallpaper, named "warty-final-ubuntu.png", I get the following error. I have also reported bug for the same, more than a year ago but it is still unresolved. Also I don't get the point why the default wallpaper is still named as "warty-final-ubuntu.png" instead of having actual code name prefix to which wallpaper belongs eg. "precise-final-ubuntu.png" and so on. General Thoughts Lots of community effort goes under development of this marvelous distribution but we're still missing out to fix such silly issues, which is directly/indirectly affecting the number of new adopters.

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  • Why doesn't the command do-release-upgrade doesn't require sudo?

    - by Dr_Bunsen
    I was wondering why the command do-release-upgrade doesn't require sudo? I mean, it does significantly change your system, so I would have guessed it requires sudo. This is from ubuntu self, but it isn't that helpful. I just want to know how this is secure for the integrity for my system, if every user can access this command. Thanks in advance. [EDIT]: I used a new terminal window, thus no sudo that wasn't expired yet, and I used the command do-release-upgrade NOT sudo do-release-upgrade.So even with unexpired sudo I should be unable to upgrade. [EDIT 2]:

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  • Why does this script not open parallel gnome-terminals on a server?

    - by broiyan
    Why am I not able to have parallel gnome-terminals on my server while I can on my client. Here is a test that illustrates the problem. #!/bin/bash # this is the parent script gnome-terminal --command "./left.sh" sleep 10 gnome-terminal --command "./right.sh" #!/bin/bash echo "this is the left script" read -p "press any key to close this terminal" key #!/bin/bash echo "this is the right script" read -p "press any key to close this terminal" key When I run this on a regular ubuntu desktop (maverick) I see two terminals after 10 seconds. When I run this on a maverick server at a server farm, the second window does not appear until after I close the first one and wait 10 seconds. I am using tightvncserver to view the server desktop. (I could have simplified a bit more. The 10 second sleep is extraneous to the problem. In my real world application I need the first terminal to do some real work before starting the second. The problem probably still exists even if there is no sleep.)

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  • Is software innovation still primarily North American and European? Why, and for how much longer?

    - by limist
    Since this site is read by a global audience of programmers, I want to know if people generally agree that the vast majority of software innovation - languages, OS, tools, methodologies, books, etc. - still originates from the USA, Canada, and the EU. I can think of a few exceptions, e.g. Nginx webserver from Russia and the Ruby language from Japan, but overwhelmingly, the software I use and encounter daily is from North America and the EU. Why? Is history and historical momentum (computing having started in USA and Europe) still driving the industry? And/or, is some nebulous (or real) cultural difference discouraging software innovation abroad? Or are those of us in the West simply ignorant of real software innovation going on in Asia, South America, Eastern Europe, etc.? When, if ever, might the centers of innovation move out of the West? Your experiences and opinions welcome, thanks!

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  • Why are part-time jobs in programming an anomaly?

    - by Mikle
    I've recently quit my full time developing job at mega-corp, and I decided that I'll look for a part time job. Since then I've talked to half a dozen potential employers, and every one of them had the same reaction when I said the magic words "part-time" - they all closed up and became suspicious. Now, I understand that it might just be me, so as control I asked every one of them what if I were willing to work full time, and they all said I would probably get an offer. My question is two fold: Why, as an employer, would you give up a competent, even great, developer, simply because he wants to work 3 days a week and not 5? How do I sell the story of part time job better? I usually just list my reasons which are that I prefer that balance currently in my life and that I want to work on my own projects, but it leaves them even more suspicious - am I going to start something myself and quit? Am I just lazy?

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  • Why USA produces the best / most popular software? [closed]

    - by user1598390
    Have you noticed that a disproportionate amount of popular software products comes from the USA ? Examples: iOS, OS X, Phosothop, Oracle, Windows, Final Cut Pro, MS Office, iTunes, iWorks Suite, iLife Suite, AutoCad, Aperture, Google search engine, Twitter and endless stream of software that are the best in their fields and that are the models the rest of the industry want to emulate. Few people would deny that the most popular software comes from American companies. Obviously there's plenty of good software coming from outside the US, like Linux or SAP but most great looking, killer software comes from USA. Maybe these companies outsource the code elsewhere but the inception and design is mostly done in the USA. Why is that? and, can it be replicated elsewhere given the correct "ingredients" ?

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  • Why is C++ predominant in programming contests and competitions?

    - by daniels
    I understand that C++ is a very fast language, but ain't C just as fast, or faster in some cases? Then you might say that C++ has OOP, but the amount of OOP you need for most programming puzzles is not that big, and in my opinion C would be able handle that. Here's why I am asking this: I am very interested in programming contests and competitions, and I am used to coding in C on those. However, I noticed that the vast majority of people use C++ (e.g., 17 out of 25 finalists on Google Code Jam 2011 used it, while no one used C), so I am wondering if I am at a disadvantage going with C. Apart from the Object Orientation, what makes C++ a more suitable language for programming competitions? What are the features of the language I should learn and use to perform better on the competitions? For background, I consider myself pretty proficient in C, but I am just starting to learn C++.

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  • Why do meshes show up as bones in the Model class?

    - by Itamar Marom
    Right now I'm working on a 3D game and I've come across something very weird. When I created the model in Blender, I added an armature named "MyBone" to the stage and attached a cube ("MyCube") to it, so that when I move the armature, the cube moves with it. I exported this as an FBX and loaded it as a Model object. What I expected to see was: But what I got was this: I'm really confused. Why is the mesh I created showing up in the bone list? And what's Root Node? Here are the .blend and .fbx files: here or here. Thanks.

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  • Why Adobe Air is so underrated for building mobile apps?

    - by Marcelo de Assis
    I worked with Adobe Flash related technologies for the last 5 years, although not being a big fan of Adobe. I see some little bugs happening in some apps, but I cannot imagine why a lot of big companies do not even think to use use Adobe Air as a good technology for their mobile apps. I see a lot of mobile developer positions asking for experts in Android or iOS , but very much less positions asking for Adobe Air, even when Adobe Air apps have the advantage of being multi-plataform, with the same app working in Blackberry, iOS and Android. Is so much easier to develop a game using Flash, than using Android SDK, for example. It really have flaws (that I never saw) or it is just some kind of mass prejudgement? I also would like to hear what a project manager or a indie developer takes when choosing a plataform for building apps.

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  • Why ubuntu does not use the kernels installed by automatic update?

    - by Guillaume Coté
    I used the script describe in this question to list the kernel installed on the computer : How do I to remove or hide old kernel versions, to clean up the boot menu? In the 3.2.0, I have 33, 34, 35, 36, 37, 38, 39, 41, 43, 44, 45 and 48. I would expect to be running 3.2.0-48 after a reboot, but I am still running 3.2.0-32. Why the kernels installed by auto update are not used? [I am running 12.04 LTS] /boot/grub/menu.lst was modified for the last time June 16 2013, it contains 3.2.0-32-generic 2.6.32-45-generic 2.6.32-44-generic 2.6.32-43-generic A recovery for each of those and a memtest. I would have expected the kernel between 3.2.0-33 to 3.2.0-48 to be in this file before 3.2.0-32.

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