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Articles indexed in May 2010

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  • Firefox 3.6.3 on Snow Leopard 10.6.3 - symbolic link to command line binary doesn't work?

    - by David Watson
    I have Firefox 10.6.3 installed on Mac OS X Snow Leopard from the DMG. I can run firefox from the terminal using /Applications/Firefox.app/Contents/MacOS/firefox-bin. However, if I create a symbolic link: sudo ln -s /Applications/Firefox.app/Contents/MacOS/firefox-bin /bin/firefox then it refuses to run, or at least display. When I issue "firefox" from the terminal, I can see the process in top, but never get the GUI to appear. :/ = ls -lr /bin/firefox lrwxr-xr-x 1 root wheel 52 May 5 15:19 /bin/firefox - /Applications/Firefox.app/Contents/MacOS/firefox-bin Any ideas? Thanks, David

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  • What Does an OS Actually Do?

    - by Ell
    What exactly does an operating system do? I know that operating systems can be programmed, in, for example, C++, but I previously believed that C++ programs must be run under an operating system? Can somebody please explain and give links? thanks in advance, ell

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  • jquery(selector) how to select the last element from two different classes

    - by Yasir Laghari
    for the following html <div> <div class="col1" > I dont want to select this </div> <div class="col2"> I dont want to select this </div> <div class="col1"> I dont want to select this </div> <div class="col1"> I dont want to select this </div> <div class="col2"> I WANT to select this </div> </div> How do I select the last element with two different class names? Tried using $("col1:last,col2:last) but it gives back 2 elements tried $("col1,col2:last") and this gives all col1 and last of col2

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  • Operator+ for a subtype of a template classe.

    - by baol
    I have a template class that defines a subtype. I'm trying to define the binary operator+ as a template function, but the compiler cannot resolve the template version of the operator+. #include <iostream> template<typename other_type> struct c { c(other_type v) : cs(v) {} struct subtype { subtype(other_type v) : val(v) {} other_type val; } cs; }; template<typename other_type> typename c<other_type>::subtype operator+(const typename c<other_type>::subtype& left, const typename c<other_type>::subtype& right) { return typename c<other_type>::subtype(left.val + right.val); } // This one works // c<a>::subtype operator+(const c<a>::subtype& left, // const c<a>::subtype& right) // { return c<a>::subtype(left.val + right.val); } int main() { c<int> c1 = 1; c<int> c2 = 2; c<int>::subtype cs3 = c1.cs + c2.cs; std::cerr << cs3.val << std::endl; } I think the reason is because the compiler (g++4.3) cannot guess the template type so it's searching for operator+<int> instead of operator+. What's the reason for that? What elegant solution can you suggest?

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  • jquery get selected dropdownlist text

    - by mike
    Hi How can i get the selected text on a dropdowm, ive seen examples of how to do eg $('select option:selected').text() but looking at my code below, how can i modify it to work as the line alert($(this).parent().text()); gets all the list items as opposed to selected text $(document).ready(function () { $('.mutuallyexclusive').live("click", function () { checkedState = $(this).attr('checked'); $('.mutuallyexclusive:checked').each(function () { $(this).attr('checked', false); }); $(this).attr('checked', checkedState); alert($(this).parent().text()); }); });

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  • is there a way to compress a GET string so it won't be so long?

    - by sct
    I need to compress a string so it is shorter for a GET method form. Is there any way to compress a string and it will be decrypted later? That way... ?error=LOTS OF STUFFLOTS OF STUFFLOTS OF STUFFLOTS OF STUFFLOTS OF STUFF is shorter in some sort of key ?error=somekey so I can get back the result later. Not using MySQL preferably. Anyone know a good method for this?

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  • Why should I prefer OSGi Services over exported packages?

    - by Jens
    Hi, I am trying to get my head around OSGi Services. The main question I keep asking myself is: What's the benefit of using services instead of working with bundles and their exported packages? As far as I know it seems the concept of Late Binding has something to do with it. Bundle dependencies are wired together at bundle start, so they are pretty fixed I guess. But with services it seems to be almost the same. A bundle starts and registers services or binds to services. Of course services can come and go whenever they want and you have to keep track of these chances. But the core idea doesn't seem that different to me. Another aspect to this seems to be that services are more flexible. There could be many implementations for one specific Interface. On the other hand there can be a lot of different implementations for a specific exported package too. In another text I read that the disadvantage of using exported packages is that they make the application more fragile than services. The author wrote that if you remove one bundle from the dependency graph other dependencies would no longer be met, thus possibly causing a domino effect on the whole graph. But couldn't the same happen if a service would go offline? To me it looks like service dependencies are no better than bundle dependencies. So far I could not find a blog post, book or presentation that could clearly describe why services are better than just exposing functionality by exporting and importing packages. To sum my questions up: What are the key benefits of using OSGi Services that make them superior to exporting and importing packages?

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  • How can I synchronize a text with audio/sound in XNA/XACT?

    - by Omkar
    Hello Geeks, I wanted to display the text while sound is playing at background. In short if there is sound/audio for "What is this", I want to display the text "What is this" in text box synchronously. Is this possible with XNA/XACT? and can I use this in standard C# based WPF or Silverlight applications? Appreciating your help.

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  • Zend Router Route Regex with Search params

    - by balan-mahadevan
    Hi , Trying to grab the params after ?. I need them to add to the Zend_Paginator. ex: http://www.example.com/test/show?name=xxx&age=20&sex=m Building a paginator for search results. Is there any solution for that ? $router = new Zend_Controller_Router_Route_Regex( 'test/show\?(.*)', array( 'controller' = 'test', 'action' = 'show', 'module' = 'user' ), array( 1 = 'q' ), 'test/show%s' ); $router_prev->addRoute('view',$router);

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  • pointer&dynamic memory

    - by gcc
    how many methods are there taking input by using with pointer and dynamic memory input 3 1 2 n k l 2 1 2 p 4 55 62 * # x x is stop character and first input 3 is for another variable int hakko; only hakko use first input the others will be hold in one pointer and input size not determined

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  • Scriptom (groovy) leaves Excel process running - am I doing something wrong?

    - by Alex Stoddard
    I am using the Scriptom extension to Groovy 1.7.0 to automate some processing using Excel 2007 under Windows XP. This always seems to leave an Excel process running despite my calling quit on the excel activeX object. (There is a passing reference to this phenomenon in the Scriptom example documentation too.) Code looks like: import org.codehaus.groovy.scriptom.ActiveXObject; def xls = new ActiveXObject("Excel.Application") xls.Visible = true // do xls stuff xls.Quit() The visible excel window does disappear but an EXCEL process is left in the task manager (and more processes pile up with each run of the script). There are no error message or exceptions. Can anyone explain why the Excel process is left behind and is there any way to prevent it from happening?

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  • JQuery tools overlay opens at the top of page instead of overlaying in IE, works fine in FF/Chrome

    - by culov
    Here is the sandbox version of my site: http://3.latest.truxmapper.appspot.com/ To reproduce the error, hover over to the toolbar and go to Support -- FAQ. In Chrome/FF, this will work as expected. In IE, the background image will quickly move to the center of the page, but when its time to insert the div over the background image, its inserted on top of the page rather than the center of the page. The plugin example ( http://flowplayer.org/tools/overlay/apple.html ) works fine in IE, so i know it ought to be possible. I've tried messing around with the div placement on the html and with the css to no avail. Does anyone know what could be the problem? Thanks!

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  • Perl - Calling subclass constructor from superclass (OO)

    - by Emmel
    This may turn out to be an embarrassingly stupid question, but better than potentially creating embarrassingly stupid code. :-) This is an OO design question, really. Let's say I have an object class 'Foos' that represents a set of dynamic configuration elements, which are obtained by querying a command on disk, 'mycrazyfoos -getconfig'. Let's say that there are two categories of behavior that I want 'Foos' objects to have: Existing ones: one is, query ones that exist in the command output I just mentioned (/usr/bin/mycrazyfoos -getconfig`. Make modifications to existing ones via shelling out commands. Create new ones that don't exist; new 'crazyfoos', using a complex set of /usr/bin/mycrazyfoos commands and parameters. Here I'm not really just querying, but actually running a bunch of system() commands. Affecting changes. Here's my class structure: Foos.pm package Foos, which has a new($hashref-{name = 'myfooname',) constructor that takes a 'crazyfoo NAME' and then queries the existence of that NAME to see if it already exists (by shelling out and running the mycrazyfoos command above). If that crazyfoo already exists, return a Foos::Existing object. Any changes to this object requires shelling out, running commands and getting confirmation that everything ran okay. If this is the way to go, then the new() constructor needs to have a test to see which subclass constructor to use (if that even makes sense in this context). Here are the subclasses: Foos/Existing.pm As mentioned above, this is for when a Foos object already exists. Foos/Pending.pm This is an object that will be created if, in the above, the 'crazyfoo NAME' doesn't actually exist. In this case, the new() constructor above will be checked for additional parameters, and it will go ahead and, when called using -create() shell out using system() and create a new object... possibly returning an 'Existing' one... OR As I type this out, I am realizing it is perhaps it's better to have a single: (an alternative arrangement) Foos class, that has a -new() that takes just a name -create() that takes additional creation parameters -delete(), -change() and other params that affect ones that exist; that will have to just be checked dynamically. So here we are, two main directions to go with this. I'm curious which would be the more intelligent way to go.

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  • Inexpensive Business Checks

    - by Randy Walker
    One of the most annoying things when setting up a business is paying the outrageous fees for business checks.  When starting out, rather than pay the $150 for the handful of computer printable checks, I had bought software that would create the checks for me.  But if you didn’t know, those little digits at the bottom of a check are magnetically encoded and requires special ink. Fortunately, my current bank has one of the best bill pay websites, so I have exclusively used it.  But since I recently had to open a new bank account, I went off in search of a cheap alternative for business checks.  A bit wary of some of the printers, I opted for TechChecks and was extremely surprised a few days later when my checks arrived in perfect condition.  (I recommend the diamond prismatic red-blue-green checks.  Beautiful and very professional looking.) It was perfect timing as well, since I now have to reorder some checks for another account.

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  • Can iSCSI be used with Windows Home Server?

    - by Parvenu74
    I am looking to use a combination of iSCSI (Drobo 8-drive device) and Windows Home Server (either an HP appliance or building one from an older machine). Will WHS + iSCSI work? If so will it work with an HP MediaSmart appliance or do I need to build a server for this particular task?

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