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• what's the story with the android XML namespace?

  - by Peter vdL

  When you first use a name from the android XML namespace, you have to say where to find it, with an attribute in XML like this: <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" However, that URL is a 404 - nothing found there. The android: namespace is actually included under the locally-installed SDK. So what's going on here? Why do I need to include a dead URL? Why doesn't the build system pick it up from the SDK like all the other libraries? Thanks, just looking for the back story on this. Peter

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• C++ defines for a 'better' Release mode build in VS

  - by darid

  I currently use the following preprocessor defines, and various optimization settings: WIN32_LEAN_AND_MEAN VC_EXTRALEAN NOMINMAX _CRT_SECURE_NO_WARNINGS _SCL_SECURE_NO_WARNINGS _SECURE_SCL=0 _HAS_ITERATOR_DEBUGGING=0 My question is what other things do fellow SOers use, add, define, in order to get a Release Mode build from VS C++ (2008,2010) to be as performant as possible? btw, I've tried PGO etc, it does help a bit but nothing that comes to parity, also I'm not using streams, the C++ i'm talking about its more like C but making use of templates and STL algorithms. As it stands now very simple code segments flop when compared to what GCC produces on say an equivalent x86 machine running linux (2.6+ kernel) using 02. Side-Note: I believe a lot of the issues relate directly to the STL version (Dinkum) provided by MS. Could people please elaborate on experiences using STLPort etc with VS C++.

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• Pushing a variable onto a vector, value at that point in vector changes when the variable does.

  - by David Andrews

  I have a programming problem =) std::vector<char*> Names; if(MyPacket.ID == 3) {Names.push_back(MyPacket.Buffer);} I push the recieved buffer onto a vector like so, but when the buffer changes so does the value of the variable at that point in the vector. So say I sent and pushed a buffer containing 'Simon' onto the vector that would be fine so at point [0] on the vector would be the word Simon. but then when I recieve a new buffer it overwrites position [0] even though the packets ID is different, a breakpoint within the if statement is not reached with this new buffer. I really hope i'm explaining this well enough, I tried asking a friends advice and he pointed me towards this site. Any help appreciated David Andrews

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• Create jQuery Slider Range With One Handle Not Using Min/Max

  - by David Savage

  Hey all, Is there any possible way to create a slider that will create a range similar to what is done with one handle using min/max, only instead of min/max, starting the range from say 50 (on a scale from 1-100)? I realize this will most likely require modification of the slider or creating a plugin, just wondering if anyone has done this already or knows how to go about it. I.e. something like this: http://jqueryui.com/demos/slider/rangemin.html Only, instead of the range going from the min, going off of where the handle is, and allowing the user to slide either left or right of that fixed starting point to create the range. Any help is appreciated, and I'd be glad to clarify what I need if that doesn't make sense! :)

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• Shoes and Gems and how to get them working.

  - by Pselus

  I have seen this question asked all over the internet and answered in many different ways. None of them seem to be working for me. I am trying to get Gems to work in Shoes (specifically the gem Mechanize). Whenever I use the code: Shoes.setup do gem 'mechanize' end require 'mechanize' It gives me the popup that says it is installing native extensions and sits at that screen for 30 minutes and longer (I've only ever waited as long as 30 minutes). I have seen people say that you should be putting the .gem files in ~/.shoes/+gem/gem (on OS X) but that hasn't worked for me. Neither has putting the source code for the gem there. On another odd note, both the gems RedCloth and Nokogiri come with Shoes...but using the above code for them gets me No such file to load errors for both of them. Anyone have any expertise in this area and can help me out?

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• php writing array in a text file fails, why?

  - by Tarique Imam

  trying to write an array to a text file, but it is failed, can anybody say, WHY? $filename= 't12a'; for ($pnum = 1; $pnum <= 15; $pnum++){ $bbal = 3; $ipmnt = 14 * 5; $ppmnt = 26 - 7; $ebal = 48 - 4; $ccint = 54 + 45; $cpmnt = 25 + 54; $db_data_txt[] = array('pn' => $pnum, 'bb' => sprintf("%01.2f",$bbal),'ip'=>sprintf("%01.2f",$ipmnt),'pp'=>sprintf("%01.2f",$ppmnt),'eb'=>sprintf("%01.2f",$ebal),'ci'=>sprintf("%01.2f",$ccint),'cp'=>sprintf("%01.2f",$cpmnt)); } $con= $db_data_txt; if ( ! write_file("./files/{$filename}.doc", $con)) { echo 'Unable to write the file'; } else { echo 'File written!'; }

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• Get country location of an IP with native PHP

  - by Mint

  Read on before you say this is a duplicate, it's not. (as far as I could see) I want to get the county code in php from the client. Yes I know you can do this using external sites or with the likes of "geoip_record_by_name" but I don't want to be dependent on an external site, and I can't install "pear" for php as im using shard Dreamhost hosting. I thought I could just do something like this: $output = shell_exec('whois '.$ip.' -H | grep country | awk \'{print $2}\''); echo "<pre>$output</pre>"; But dreamhost seems to have an old version of whois (4.7.5), so I get this error on allot of IPs: Unknown AS number or IP network. Please upgrade this program. So unless someone knows how to get a binary of a newer version of whois onto dreamhost im stuck. Or is there another way I could get the country code from the client who is loading the page?

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• Virtual camera/direct show filter for network stream

  - by Jeje

  Hi guys, i'm working with Flash Live Encoder. It's using camera for streaming video. Support forum say's that i can create custom direct show filter and stream data that i need. I cann't understand how direct show filter will display in the source list of the live encoder. I've tryed to use some commercial virtual camera and it work's fine, but it cann't use source from network stream. Summary. I have a several network streams. I think that i must to create virtual camera for each one. But if i find examples with direct show filter on C#, i cann't find for virtual camera.

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• Spring - disable bind exceptions (for a particular property)

  - by Walter White

  Hi all, In a web application I'm working on using Spring 2.5.6.SEC01, I essentially have an Integer field that takes a number to determine which page to scroll to. The requirements changed, and we no longer want to display an error message, but simply ignore the user's input if they enter an invalid number, say "adfadf". I was reading that you can do that via: TypeMismatch.property=Some New Error Message However, after having tried that, we are still getting the original error message: java.lang.Integer.TypeMismatch=... I only want to disable this message for that given property. How can I do that? I still want binding to occur automatically, I just don't want to hear about it now. Walter

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• shared_ptr requires complete type; cannot use it with lua_State*

  - by topright

  Hello! I'm writing a C++/OOP wrapper for Lua. My code is: class LuaState { boost::shared_ptr<lua_State> L; LuaState(): L( luaL_newstate(), LuaState::CustomDeleter ) { } } The problem is lua_State is incomplete type and shared_ptr constructor requires complete type. And I need safe pointer sharing. (Funny thing boost docs say most functions do not require complete type, but constructor requires, so there is no way of using it. http://www.boost.org/doc/libs/1_42_0/libs/smart_ptr/smart_ptr.htm) Can can I solve this? Thank you.

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• Ordering the calling of asynchronous methods in c#

  - by Peter Kelly

  Hi, Say I have 4 classes ControllerClass MethodClass1 MethodClass2 MethodClass3 and each MethodClass has an asynchronous method DoStuff() and each has a CompletedEvent. The ControllerClass is responsible for invoking the 3 asynchronous methods on the 3 MethodClasses in a particular order. So ControllerClass invokes MethodClass1.DoStuff() and subscribes to MethodClass1.CompletedEvent. When that event is fired, ControllerClass invokes MethodClass2.DoStuff() and subscribes to MethodClass2.CompletedEvent. When that event is fired, the ControllerClass invokes MethodClass3.DoStuff() Is there a best practice for a situation like this? Is this bad design? I believe it is because I am finding it hard to unit test (a sure sign) It is not easy to change the order I have an uneasy, code-smell feeling about it What are the alternatives in a situation like this?

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• google search as an rss feed

  - by Jonathan

  Hi guys, Is there a way to have treat google serach results as an rss feed? For example say I worked for stackoverflow and wanted to montior how if the results from the following search url: http://www.google.com/search?hl=en&q=stackoverflow changes from day today. It would be cool if I could append &output=rss to the url and get back a feed like with google news. But that does not seem to be supported. Anyone have ideas? (Note I am programing with Ruby and Rails, if that matters) Thanks! Jonathan

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• Instant Messenger: How does gtalk/yahoo messenger populate the contact list?

  - by Owen

  Hi All, We are currently working on a small IM project which pretty much works like gtalk and yahoo messenger. We came across a problem that puzzled us how gtalk/ym populate their contact lists. Given that the user has let's say more or less 500 contacts, both IMs seem to readily load the contacts pretty fast and already sorted. Here are my questions(referring to either): Does it cache its contacts, like saving it in a file somewhere upon exit so that upon log-in it readily extracts the contacts and displays it in its contact list? Does it always request for the VCARDS upon log in? OR they have a VCARD push or whatever that simply updates the contacts' profiles (like that of their status [presence push - available, busy, etc...] )?

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• Inserting a table column with jQuery

  - by fudgey

  I have a table of data that I need to dynamically add a column to. Lets say I have this basic table to start with: <table> <tr><td>cell 1</td><td>cell 2</td><td>cell 3</td></tr> <tr><td>cell 1</td><td>cell 2</td><td>cell 3</td></tr> <tr><td>cell 1</td><td>cell 2</td><td>cell 3</td></tr> </table> I would like to insert a column between cell 1 and cell 2 in each row... I've tried this but it just isn't working like I expect... maybe I need more caffeine. $(document).ready(function(){ $('table').find('tr').each(function(){ $(this).prepend('<td>cell 1a</td>'); }) })

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• Can I add custom methods/attributes to built-in Python types?

  - by sfjedi

  For example—say I want to add a helloWorld() method to Python's dict type. Can I do this? JavaScript has a prototype object that behaves this way. Maybe it's bad design and I should subclass the dict object, but then it only works on the subclasses and I want it to work on any and all future dictionaries. Here's how it would go down in JavaScript: String.prototype.hello = function() { alert("Hello, " + this + "!"); } "Jed".hello() //alerts "Hello, Jed!" Here's a useful link with more examples— http://www.javascriptkit.com/javatutors/proto3.shtml

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• How does operating system software maintains time clocks?

  - by Neeraj

  Hi everyone, This may sound a bit less relevant but I couldn't think of a better place to ask this question. Now consider this situation, you install an OS on your system, set the timezone and time, do some stuff and turn it off. (Note that there is no power going in to the computer). Now next time (say after some hours or days) you turn it on again, and you see the updated time. How is this possible even when my computer is not connected to the internet and was consuming no power during the period it was down.(Is there some kind of hardware hack?) please clarify!

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• DataView Vs DataTable.Select()

  - by Aseem Gautam

  Considering the code below: Dataview someView = new DataView(sometable) someView.RowFilter = someFilter; if(someView.count > 0) { …. } Quite a number of articles which say Datatable.Select() is better than using DataViews, but these are prior to VS2008. Solved: The Mystery of DataView's Poor Performance with Large Recordsets Array of DataRecord vs. DataView: A Dramatic Difference in Performance So in a situation where I just want a subset of datarows based on some filter criteria(single query) and what is better DataView or DataTable.Select()?

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• Bitmap files added in .rc not listed in resource.h

  - by ame

  I added a large number of bitmap files to my MFC project in resource view (Visual Studio). However, the resource.h file does not list any of these files. I would want them to be listed with exactly the same name as they are added in .rc bitmap list (say the name is xxx) I want it listed as #define IDB_xxx If I try to click on the bitmap in the .rc list and import it, it gets listed as IDB_BITMAP1. Owing to the large number of files it is not feasible for me to manually rename them for use in my code.

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• Getting an entry before and after a given entry in a Django Queryset

  - by Vernon

  I am creating a simple blog as part of a website and I am getting stuck on something that I am assuming is simple. If I call any blog post, say by it's title, from a queryset, how can I get the entry before and after the post in it's published order. I can iterate over the whole thing, get the position of the entry I have and use that to call the one before and the one after. But that is a long bit of code for something that I am sure I can do more simply. What I want would be something like this: next_post = Posts.object.filter(title=current_title).order_by("-published")[-1] Of course because of the filter, it is not going to work, but just to give you the idea of what I am looking for.

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• Can I use the CSS :visited pseudo class on 'wildcard' links?

  - by rabidpebble

  Let's say I have a site with multiple links as follows: www.example.com/product/1 www.example.com/product/2 www.example.com/product/3 I also append tracking info to links from time to time so that I can see how my site is being used, e.g, if somebody visits the products page from the product browser I would set a ref parameter: www.example.com/product/1&ref=pb www.example.com/product/2&ref=pb www.example.com/product/3&ref=pb The problem with this is that if the user visits a link of the first type and then views a link of the second type then the :visited pseudo class doesn't seem to apply because the browser only seems to match on exact URLs. Is there any way to have "wildcards" apply to links in this sense, so that when the user sees either the first type or the second type of link that it is highlighted? Note: I cannot change this "ref" architecture; it is inherited.

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• Wicket : Can a Panel or Component react on a form submit without any boilerplate code?

  - by MRalwasser

  I am currently evaluating Wicket and I am trying to figure out how things work. I have a question regarding form submit and panels (or other components). Imagine a custom wicket panel which contains a text field, doing as-you-type validation using ajax. This panel is added to a form. How can the Panel react a form submit (let's say because javascript/ajax is unavailable)? I am currently only aware of one solution: calling a panel's method inside the Form onSubmit() method. But this seems not like a "reusable" approach here, because I have to add boilerplate code to every form's onSubmit() which contains the panel (and every developer which use the panel must know this). So here comes my question: Is there any way that a Panel/Component can "detect" a form submit in some way? Or is there any other solution beside this? Thank you.

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• Twill/Mechanize access to html content...

  - by Shaheeb Roshan

  Hello! Couple of questions regarding Twill and Mechanize: 1) Is Twill still relevant as a web-automation tool? If yes, then why is not currently maintained? If no, has Mechanize matured further to support Twill-style simple scripting? Or is there another package that has stepped up to fill the gap? 2) I was able to very quickly setup a couple of test suites in python using Twill, but I'm a little confused on how to access the information that Twill spits out in my python program. That is, I can do showforms() and see the form values neatly listed and I can use fv to update the form values and submit. But how do I access one of those form values as a python var? How can I say something like: someField1Value = fv("1","someField1") Thanks! Shaheeb R.

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• using extends with Java Generics

  - by Sandro

  Lets say that I have the following code: public class Shelter<A extends Animal, B extends Animal> { List<A> topFloor = new Vector<A>(); List<B> bottomFloor = new Vector<B>(); public A getFirstTopFloorAnimal(){return topFloor.firstElement();} public B getFirstBottomFloorAnimal(){return bottomFloor.firstElement();} //This compiles but when I try to use it, it only returns objects public List<Animal> getAnimals() { Vector a = new Vector(topFloor); a.addAll(bottomFloor); return a; } } Now for somereason the following code compiles. But when I try to use getAnimals() I get a of objects instead of Animal. Any ideas why this is? Does this have to do with the List is NOT a List idea in the Generics tutorial? Thank you.

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• perl hashes - comparing keys and values

  - by Aaron Moodie

  I've been reading over the perl doc, but I can't quite get my head around hashes. I'm trying to find if a hash key exists, and if so, compare is't value. The thing that is confusing me is that my searches say that you find if a key exists by if (exists $files{$key}) , but that $files{$key} also gives the value? the code i'm working on is: foreach my $item(@new_contents) { next if !-f "$directory/$item"; my $date_modified = (stat("$directory/$item"))[9]; if (exists $files{$item}) { if ($files{$item} != $date_modified { $files{$item} = $date_modified; print "$item has been modified\n"; } } else { $files{$item} = $date_modified; print "$item has been added\n"; } }

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• paypal IPN php script

  - by pol

  I just realized that my paypal ipn handler in php doesn't work anymore (and I change nothing), I use the sample php script provided by paypal. I tried to isolate the problem by making several test, and at this time I can say that the problem is not the "VERIFIED" or the "INVALID" thing but comes from these lines: [...] fputs ($fp, $header . $req); while (!feof($fp)) { $res = fgets ($fp, 1024); if (strcmp ($res, "VERIFIED") == 0) { // check the payment_status is Completed [...] Anyone know if paypal change something or why it doesn't work? thanks' ps: if I put my code before all the paypal tests (before the line "if (!$fp)") it just works fine

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