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  • A little javascript help needed here (easy).

    - by Camran
    function addOption(selectbox, val, txt){ ...... } addOption(list, "Cars", "Cars"); I need to add this in front of the text of the function: &nbsp;&nbsp;&nbsp; So that there is space coming in before the option text...Never mind what it is for, it is just confusing... I just don't know how to insert it into the js code. If I do it like this: addOption(list, "Cars", "&nbsp;&nbsp;&nbsp;Cars"); Then the &nbsp;&nbsp;&nbsp; comes into the text, so it gets displayed for the users. However I need it to be interpreted as "space"... If you don't understand let me know... How can I do this? Quotes, double quotes etc? Thanks

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  • Java concurrency - Should block or yield?

    - by teto
    Hi, I have multiple threads each one with its own private concurrent queue and all they do is run an infinite loop retrieving messages from it. It could happen that one of the queues doesn't receive messages for a period of time (maybe a couple seconds), and also they could come in big bursts and fast processing is necessary. I would like to know what would be the most appropriate to do in the first case: use a blocking queue and block the thread until I have more input or do a Thread.yield()? I want to have as much CPU resources available as possible at a given time, as the number of concurrent threads may increase with time, but also I don't want the message processing to fall behind, as there is no guarantee of when the thread will be reescheduled for execution when doing a yield(). I know that hardware, operating system and other factors play an important role here, but setting that aside and looking at it from a Java (JVM?) point of view, what would be the most optimal?

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  • sIFR 3 - sifr-config.js possibly not running? Not sure what's wrong.

    - by nukegara
    Hi, I've been messing with this for a few hours, and I just can't get the text to be replaced at all. I really can't believe it's taking so long, especially because I did this a few months ago and got it to work in minutes. Anyway, here is my site I'm working on: http://www.moreheadplanetarium.org/regeneration/test/vision.php and I want to replace the h1 tag (Morehead's Vision). I don't know what's wrong, since I've done everything I know to do. I'm jumping back into web design and using Firebug, and when I check the scripts it only has sifr.js and sifr-debug.js in the list, so I'm assuming the config isn't loading but I have no idea what could be the hold up... How do you get the debug to work btw? thanks!

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  • Designing operation (a,b) -> (c,d)

    - by golergka
    I have an operation that I need to design. That operation takes two objects of a certain class X, and returns two new objects of the same class (I may need the originals later). The logic that dictates the selection of this object is contained in class Y. On one hand, I don't want class Y to know details about class X implementation; on the other, I don't want class X to know details about selecting the different objects to perform this operation on. If that was all the problem, I'd just create a static method on class A. However, the methods in language I'm working on return only one object. Also, the operation needs to be robust, and calling operation two times to get C and D respectively isn't possible, as both C & D both rely on a single random number. How should I design such operation? Update: I'm using Obejctive C.

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  • Wordpress: Forcing a widget to display?

    - by meds
    I've been trying to make a widget which stays active permanently on a wordpress sidebar, preferably being on top before all other widgets. However the only way I have figured I can do this is by manually modifying individual sidebar.php's but that is slow and inefficient. So is there a way I can force a widget to display in a sidebar? If I was to change actual wordpress code where would I go about doing htis? I Know where a widget is registered but I don't know where a widget is activated, if I knew this I think I could force the main widget I want to see active all the time be active.

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  • why are javascript functions like this

    - by Kajal
    I am a starter to javascript. I know to write JS userdefined functions. But recently I came across some thing that I can’t recognize. Can anyone explain to me what this is? (function( window, undefined ) { var jQuery = (function() { }); window.jQuery = window.$ = jQuery; })(window); What is the meaning of this? When I Google javascript functions I am getting only function foo(){ alert("This is an alert"); } I know to use these type of functions

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  • Is it possible to deploy a Ruby app on a plain clean Passenger setup?

    - by Folletto
    I'm thinking to something really similar on what you can do with mod_php: drop an application in some way inside Apache and making it run with Passenger, without adding anything inside httpd.conf (no vhost, nothing except the basic Passenger configuration). It's something very similar to Wordpress or many other frameworks: just unzip/svn checkout it inside a folder and run it. I know that it's possible with CGI and FCGI, but I'm wondering if it's also possible to tap in the speed of Passenger. I've tried fiddling with the Rack instructions on the official website trying to find a specific .htaccess and config.ru configuration, but nothing so far. I know it's not common, but... is it even possible?

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  • Android streamming video from camera

    - by user1415651
    Sorry about my English i hope that can be understandable... I'm working on one App for Android and my purpose is to stream video over the phone camera to other Android phone (application). I don´t know so much about streamming video, and what i want to know is what i need to do.. I need to create a streamming server that receive the video from one android phone? How i do this? And what is the best way to do this? how i can set up/configure a streamming server? someone can help me with some explanation or tutorials? Thanks in advance!

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  • Change IP where domain is pointing

    - by Christian Sciberras
    This is probably a very strange request. I need to programmaticaly (via code) change the IP where a domain name is pointing to. IE: xyz.com points to 100.100.100.100 setIP('xyz.com','100.100.100.100'); I know this [code] is practically impossible, however, what I need is to do this via domain host API etc or other possible ways you might think of. I'd be happy even if it weren't anything more then sending an email to the DNS owner/host. Do you know of anything the like or which might help? (nb: considered throwing this at ServerFault, but felt it more at home here ;) ) Cheers!

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  • When should I define an hash code function for my types?

    - by devoured elysium
    Is there any other reason for implementing an hash code function for my types other than allowing for good use of hash tables? Let's say I am designing some types that I intend to use internally. I know that types are "internal" to the system, and I also know I will never use those types in hash tables. In spite of this, I decide I will have to redefine the equals() method. Theory says I should also redefine the hash code method, but I can't see any reason why, in this case, I should do it. Can anyone point me out any other reason? This question can be rephrased to : in which situations should we implement a hash code method in our types. PS : I am not asking how to implement one. I am asking when.

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  • Why System.String's beahaves like a value type?

    - by Sorush Rabiee
    I want to write a 'Date' class that behaves like a Value Type. for example, Instead of writing a Clone method for setting properties safely, make the Date class to pass by value: public Date Birthday { get { return this.birthday; } set { this.birthday = value.Clone(); } //I want to write this.birthday = value; //without changing external value when this.Birthday changes } I know this is possible because System.String is a class and behaves like a value. for example: String s1 = "Hello"; String s2 = "Hi"; s1 = s2; s2="Hello"; Console.WriteLine(s1); //Prints 'Hi' First I thought writers of this class override '=' operator, but now I know that the '=' operator can not be overridden. so how they write String class?

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  • How to turn one server into many servers? (Virtualization/VMWare)

    - by user1229962
    I'm hoping for a high level discussion of this problem I know is quickly approaching my application. I have a server that binds on a specific port and manages TCP Sockets from my clients. I know that it is common practice to use VMWare to virtualize servers and run multiple servers at once. How can a single server design be changed to support multiple servers? Multiple servers can't bind to the same port. If I had to guess I would say a proxy server binds to the port and then sends connections off to the other servers to be handled as if it was still a single server application. I'm wondering what options there are and what are the common practices for solving this problem? Thanks in advance!

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  • Passing class method as selector problem.

    - by Anoide
    Hi, I want to build a selector from a class method. I'm doing it this way: NavigationTreeActionHandler* handler=[NavigationTreeActionHandler self]; NavigationTreeNode* bombsNode=new NavigationTreeNode("Bombs","bigbomb.tif" ,handler,@selector(BigBombButtonPressed:)); I need to pass to NavigationTreeNode the target and the selector to the target method. I try to get the target using the self property of the class object (Don't know if htis is the correct way to do it). Then I get the selector for the class method I want to call on the class. Everything compiles ok but it fails when I use: [[handler class] instanceMethodSignatureForSelector:selector]; I get a nil and don't really know why... could anybody help please? Thanks in advance, Olson.

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  • Which is better, save a website images on Amazon S3, Flickr or Picasa?

    - by Amr ElGarhy
    I have a website and going to extend it, so users will upload their images on this website, i want to save users images in another storage service. Users will save images and view them, and also share with others. I know that i can do that using Amazon S3, Flickr or Picasa. But i want to know which is better than which? which one should i use and why? Based on your experiences, can you recommend one, or advice me if you a better service than those 3?

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  • C#: reading in a text file more 'intelligently'

    - by DarthSheldon
    I have a text file which contains a list of alphabetically organized variables with their variable numbers next to them formatted something like follows: aabcdef 208 abcdefghijk 1191 bcdefga 7 cdefgab 12 defgab 100 efgabcd 999 fgabc 86 gabcdef 9 h 11 ijk 80 ... ... I would like to read each text as a string and keep it's designated id# something like read "aabcdef" and store it into an array at spot 208. The 2 issues I'm running into are: I've never read from file in C#, is there a way to read, say from start of line to whitespace as a string? and then the next string as an int until the end of line? given the nature and size of these files I do not know the highest ID value of each file (not all numbers are used so some files could house a number like 3000, but only actually list 200 variables) So how could I make a flexible way to store these variables when I don't know how big the array/list/stack/etc.. would need to be.

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  • Parsing timestamps - do it in MySQL or in PHP?

    - by Andrew Heath
    Let's say you've got a table with a timestamp column, and you want to parse that column into two arrays - $date and $time. Do you, personally: a) query like this DATE(timestamp), TIME(timestamp) , or perhaps even going as far as HOUR(timestamp), MINUTE(timestamp b) grab the timestamp column and parse it out as needed with a loop in PHP I feel like (a) is easier... but I know that I don't know anything. And it feels a little naughty to make my query hit the same column 2 or 3 times for output... Is there a best-practice for this?

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  • C++ Char without Limit

    - by Lienau
    I'm pretty well versed in C#, but I decided it would be a good idea to learn C++ as well. The only thing I can't figure out is chars. I know you can use the string lib but I also want to figure out chars. I know you can set a char with a limit like this: #include <iostream> using namespace std; int main() { char c[128] = "limited to 128"; cout << c << endl; system("pause"); return 0; } But how would I make a char without a limit? I've seen chars with * but I though that was for pointers. Any help is greatly appreciated.

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  • While programming, what to do when facing with a seemingly unsolvable situation with a time limit?

    - by Ersan Tasan
    This is not a technical question, but rather a social and methodical one. I am a computer sciences student and I usually have really tough programming assignments. I don`t know if it is only happening to me but sometimes, particularly when deadline is approaching, i find myself in a harsh situation. I cannot find my mistake in the code or come up with a another great idea. Then boredom comes in and the problem begins to seem unsolvable. I know there are more-than-great professional coders here. I would like to learn their ideas to cope with this situation. Is it better to focus on something else for a while and try again or try harder and harder and look for the solution on the net etc...

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