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• Beginner error in CUDA

  - by Dimitri

  Hi folks, first all i want to wish you a merry christmas. I am writing a small program in CUDA and i have the following errors : contraste.cu(167): error: calling a host function from a __device__/__global__ function is not allowed I don't understand why. Can you please help me and show me my errors. It seems that my program is correct. Here is a the bunch of code causing the problems : __global__ void kernel_contraste(float power, unsigned char tab_in[], unsigned char tab_out[], int nbl, int nbc) { int x = threadIdx.x; printf("I am the thread %d\n", x); } Part of my main program : unsigned char *dimg, *dimg_res; ..... cudaMalloc((void **)dimg, h * w * sizeof(char)); cudaMemcpy(dimg, r.data, h*w*sizeof(char), cudaMemcpyHostToDevice); cudaMalloc((void **)dimg_res, h*w*sizeof(char)); dim3 nbThreadparBloc(256); dim3 numblocs(1); kernel_contraste<<<numblocs, nbThreadparBloc >>>(puissance, dimg, dimg_res, h, w); cudaThreadSynchronize(); ..... cudaFree(dimg); cudaFree(dimg_res); The line 167 is the line where i call the printf in function kernel_contraste. For information, this program takes an image as an input( a sun Rasterfile ) and a power then it calculates the contraste of that image. Thanks !!

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• help me to parse JSON value using JSONTouch

  - by EquinoX

  I have the following json: http://www.adityaherlambang.me/webservice.php?user=2&num=10&format=json I would like to get all the name in this data by the following code, but it gives an error. How can I fix it? NSString *responseString = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding]; NSDictionary *results = [responseString JSONValue]; NSDictionary *users = [results objectForKey:@"users"] objectForKey:@"user"]; for (NSDictionary *user in users){ //NSLog(@"key:%@, value:%@", user, [user objectForKey:user]); NSString *title = [users objectForKey:@"NAME"]; NSLog(@"%@", title); } Error: 2011-01-29 00:18:50.386 NeighborMe[7763:207] -[__NSArrayM objectForKey:]: unrecognized selector sent to instance 0xb618840 2011-01-29 00:18:50.388 NeighborMe[7763:207] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSArrayM objectForKey:]: unrecognized selector sent to instance 0xb618840' *** Call stack at first throw: ( 0 CoreFoundation 0x027d9b99 __exceptionPreprocess + 185 1 libobjc.A.dylib 0x0292940e objc_exception_throw + 47 2 CoreFoundation 0x027db6ab -[NSObject(NSObject) doesNotRecognizeSelector:] + 187 3 CoreFoundation 0x0274b2b6 ___forwarding___ + 966 4 CoreFoundation 0x0274ae72 _CF_forwarding_prep_0 + 50 5 NeighborMe 0x0000bd75 -[NeighborListViewController connectionDidFinishLoading:] + 226 6 Foundation 0x0007cb96 -[NSURLConnection(NSURLConnectionReallyInternal) sendDidFinishLoading] + 108 7 Foundation 0x0007caef _NSURLConnectionDidFinishLoading + 133 8 CFNetwork 0x02d8d72f _ZN19URLConnectionClient23_clientDidFinishLoadingEPNS_26ClientConnectionEventQueueE + 285 9 CFNetwork 0x02e58fcf _ZN19URLConnectionClient26ClientConnectionEventQueue33processAllEventsAndConsumePayloadEP20XConnectionEventInfoI12XClientEvent18XClientEventParamsEl + 389 10 CFNetwork 0x02e5944b _ZN19URLConnectionClient26ClientConnectionEventQueue33processAllEventsAndConsumePayloadEP20XConnectionEventInfoI12XClientEvent18XClientEventParamsEl + 1537 11 CFNetwork 0x02d82968 _ZN19URLConnectionClient13processEventsEv + 100 12 CFNetwork 0x02d827e5 _ZN17MultiplexerSource7performEv + 251 13 CoreFoundation 0x027bafaf __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 15 14 CoreFoundation 0x0271939b __CFRunLoopDoSources0 + 571 15 CoreFoundation 0x02718896 __CFRunLoopRun + 470 16 CoreFoundation 0x02718350 CFRunLoopRunSpecific + 208 17 CoreFoundation 0x02718271 CFRunLoopRunInMode + 97 18 GraphicsServices 0x030b800c GSEventRunModal + 217 19 GraphicsServices 0x030b80d1 GSEventRun + 115 20 UIKit 0x002e9af2 UIApplicationMain + 1160 21 NeighborMe 0x00001c34 main + 102 22 NeighborMe 0x00001bc5 start + 53 23 ??? 0x00000001 0x0 + 1 ) terminate called after throwing an instance of 'NSException' I really just wanted to be able to iterate through the names

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• Is there a quality, file-size, or other benefit to JPEG sizes being multiples of 8px or 16px?

  - by davebug

  The JPEG compression encoding process splits a given image into blocks of 8x8 pixels, working with these blocks in future lossy and lossless compressions. [source] It is also mentioned that if the image is a multiple 1MCU block (defined as a Minimum Coded Unit, 'usually 16 pixels in both directions') that lossless alterations to a JPEG can be performed. [source] I am working with product images and would like to know both if, and how much benefit can be derived from using multiples of 16 in my final image size (say, using an image with size 480px by 360px) vs. a non-multiple of 16 (such as 484x362). In this example I am not interested in further alterations, editing, or recompression of the final image. To try to get closer to a specific answer where I know there must be largely generalities: Given a 480x360 image that is 64k and saved at maximum quality in Photoshop [example]: Can I expect any quality loss from an image that is 484x362 What amount of file size addition can I expect (for this example, the additional space would be white pixels) Are there any other disadvantages to growing larger than the 8px grid? I know it's arbitrary to use that specific example, but it would still be helpful (for me and potentially any others pondering an image size) to understand what level of compromise I'd be dealing with in breaking the non-8px grid. The key issue here is a debate I've had is whether 8-pixel divisible images are higher quality than images that are not divisible by 8-pixels.

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• Passing XML data and user from coldfusion page to .NET page

  - by Mark Rullo

  I'd appreciate some input on this situation, I can't figure out the best way to do this. I have some data that's being prepared for me in a ColdFusion app and in an IFrame within the CF app we want to display some graphs (not strictly an image, it's an entire page) being generated on the .NET side of things. I'd like to pass XML data from the CF side to .NET as well as the user. On the .NET side I'm putting the data in a session so the user can sift through it without the need to have it re-queried and re-passed from CF. What I've tried: Generating XML with CF, putting it in a hidden form field, auto-submitting (with JS) a the form to the .NET side. The issue I'm having with this approach is the encoding being done on the form post. The data has entries like <entry data="hello &amp; goodbye">. It's an issue because it's being URL encdeded, Posted, and when I get it on the .NET side I get <entry data="hello & goodbye"> which isn't properly formed XML. What I'd like to avoid: An intermediary DB approach (dropping the data in a DB on CF, picking it up with .NET) I'd like to only display what is passed to the page. I have security concerns with the data, it's very sensitive. Passing the data to a webservice, returning a GUID, forwarding the user with a URL Parameter to access the passed in data. I think that'd be risky if someone happened on a link to that data. I can't take that risk. I was thinking of passing the data with JSON, but I'm very unfamiliar with it. Thoughts? Thanks for your time folks.

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• PHP download page: file_exists() returns true, but browser returns 'page not found'

  - by Chris

  I'm using PHP for a file download page. Here's a snippet of the problem code: if (file_exists($attachment_location)) { header($_SERVER["SERVER_PROTOCOL"] . " 200 OK"); header("Cache-Control: public"); // needed for i.e. header("Content-Type: application/zip"); header("Content-Transfer-Encoding: Binary"); header("Content-Length:".filesize($attachment_location)); header("Content-Disposition: attachment; filename=file.zip"); readfile($attachment_location); die("Hooray"); } else { die("Error: File not found."); } This code works absolutely fine when testing locally, but after deploying to the live server the browser returns a 'Page not found' error. I thought it might be an .htaccess issue, but all .htaccess files on the live server are identical to their local counterparts. My next guess would be the live server's PHP configuration, but I have no idea what PHP setting might cause this behaviour. The file_exists() function always returns true - I've checked this on the live server and it's always correctly picking up the file, its size etc., so it does have a handle on the file. It just won't perform the download! The main site is a Wordpress site, but this code isn't part of a Wordpress page - it's in a standalone directory within the site root. UPDATE: is_file() and is_readable() are both returning true for the file, so that's not the problem. The specific line that is causing the problem is: readfile($attachment_location) Everything up until that point is super happy.

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• custom sorting or ordering a table without resorting the whole shebang

  - by fuugus

  for ten years we've been using the same custom sorting on our tables, i'm wondering if there is another solution which involves fewer updates, especially since today we'd like to have a replication/publication date and would'nt like to have our replication replicate unnecessary entries. i had a look into nested sets, but it does'nt seem to do the job for us. base table: id | a_sort ---+------- 1 10 2 20 3 30 after inserting insert into table (a_sort) values(15) an entry at the second position. id | a_sort ---+------- 1 10 2 20 3 30 4 15 ordering the table with select * from table order by a_sort and resorting all the a_sort entries, updating at least id=(2,3,4) will of course produce the desired output id | a_sort ---+------- 1 10 4 20 2 30 3 40 the column names, the column count, datatypes, a possible join, possible triggers or the way the resorting is done is/are irrelevant to the problem. also we've found some pretty neat ways to do this task fast. only; how the heck can we reduce the updates in the db to 1 or 2 max. seems like an awfully common problem. the captain obvious in me thougth once "use an a_sort float(53), insert using a fixed value of ordervaluefirstentry+abs(ordervaluefirstentry-ordervaluenextentry)/2".. but this would only allow around 1040 "in between" entries - so never resorting seems a bit problematic ;)

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• Why does the roll_out event fire in this code?

  - by user339681

  I have made this simple example to demonstrate some problems I'm having. <?xml version="1.0" encoding="utf-8"?> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute"> <mx:Canvas id="buttonCanvas" x="100" y="100" opaqueBackground="#000000" width="80%" height="300" creationComplete="init(event)"> <mx:Button x="5" y="5"/> <mx:Button x="5" y="50"/> </mx:Canvas> <mx:Script> <![CDATA[ private function init(event:Event):void{ buttonCanvas.addEventListener(MouseEvent.ROLL_OUT, function(event:Event):void{ buttonCanvas.opaqueBackground=(buttonCanvas.opaqueBackground==0)? 0x666666:0; }); } ]]> </mx:Script> </mx:Application> I don't understand the following: Why doesn't the percentage nor absolute dimensions affect the canvas? Why does the roll_out event fire when the mouse leaves a button (even when it is still inside the canvas). I'm going nuts trying to figure this out. Any help would be greatly appreciated!

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• Uploadin Image - Objective C

  - by Sammaeliv

  Hi, i have this code the i find on youtube xD my cuestion is , how do i add an extra parameter NSData *imageData = UIImageJPEGRepresentation(imagen.image,0.0); NSString *urlString = @"http://urlexample.com/upload.php"; NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease]; [request setURL:[NSURL URLWithString:urlString]]; [request setHTTPMethod:@"POST"]; NSString *boundary = [NSString stringWithString:@"---------------------------14737809831466499882746641449"]; NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@", boundary]; [request addValue:contentType forHTTPHeaderField:@"Content-Type"]; NSMutableData *body = [NSMutableData data]; [body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]]; [body appendData:[[NSString stringWithString:@"Content-Disposition: form-data; name=\"userfile\"; filename=\".jpg\"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]]; [body appendData:[[NSString stringWithString:@"Content-Type: application/octet-stream\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]]; [body appendData:[NSData dataWithData:imageData]]; [body appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]]; [request setHTTPBody:body]; NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil]; NSString *returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding]; NSLog(returnString); I try [body appendData:[[NSString stringWithFormat:@"extra=%@",info] dataUsingEncoding:NSUTF8StringEncoding]; hehehe im 100% new on this as you can see... please help me xD

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• Not Understanding Basics Of Dynamic DataBinding (bindPropety) In Flex

  - by Joshua

  I need to dynamically bind properties of components created at runtime. In this particular case please assume I need to use bindProperty. I don't quite understand why the following simplistic test is failing (see code). When I click the button, the label text does not change. I realize that there are simpler ways to go about this particular example using traditional non-dynamic binding, but I need to understand it in terms of using bindProperty. Can someone please help me understand what I'm missing? <?xml version="1.0" encoding="utf-8"?> <mx:WindowedApplication xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" xmlns:ns1="Tools.*" minWidth="684" minHeight="484" xmlns:ns2="*" creationComplete="Init();"> <mx:Script> <![CDATA[ import mx.collections.ArrayCollection; import mx.binding.utils.*; public var Available:ArrayCollection=new ArrayCollection(); public function get Value():String { return (Available.getItemAt(0).toString()); } public function Init():void { Available.addItemAt('Before', 0); BindingUtils.bindProperty(Lab, 'text', this, 'Value'); } public function Test():void { Available.setItemAt('After', 0); } ]]> </mx:Script> <mx:Label x="142" y="51" id="Lab"/> <mx:Button x="142" y="157" label="Button" click="Test();"/> </mx:WindowedApplication> Thanks in advance.

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• JSON to display text -- Freezes UI

  - by Adam Storr

  Hi everyone, I currently have a very simple view which displays info from a JSON feed. The problem I'm facing is the few second pause I encounter once I press this tab. How can I make this view load instantly and then have the label.text areas load after? Preferable with an activity indicator? Should I use threads? Thanks in advance! Code: - (NSString *)stringWithUrl:(NSURL *)url { NSURLRequest *urlRequest = [NSURLRequest requestWithURL:url cachePolicy:NSURLRequestReloadRevalidatingCacheData timeoutInterval:30]; NSData *urlData; NSURLResponse *response; NSError *error; urlData = [NSURLConnection sendSynchronousRequest:urlRequest returningResponse:&response error:&error]; return [[NSString alloc] initWithData:urlData encoding:NSUTF8StringEncoding]; } - (id)objectWithUrl:(NSURL *)url { SBJsonParser *jsonParser = [SBJsonParser new]; NSString *jsonString = [self stringWithUrl:url]; return [jsonParser objectWithString:jsonString error:NULL]; } - (NSDictionary *)downloadStats { id response = [self objectWithUrl:[NSURL URLWithString:@"http://www.example.com/JSON"]]; NSDictionary *feed = (NSDictionary *)response; return feed; [feed release]; } - (void)viewDidLoad { [super viewDidLoad]; [GlobalStatsScrollView setScrollEnabled:YES]; [GlobalStatsScrollView setContentSize:CGSizeMake(320, 360)]; } - (void)viewWillAppear:(BOOL)animated { NSLog(@"View appears"); // Download JSON Feed NSDictionary *feed = [self downloadStats]; totalproduced.text = [feed valueForKey:@"Produced"]; totalno.text = [feed valueForKey:@"Total"]; mostcommon.text = [feed valueForKey:@"Most Common"]; }

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• ListSelector applies to the entire list

  - by jax

  I have a simple list with a listselector like so. <ListView android:id="@+id/list" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_below="@+id/round" android:listSelector="#99000000" android:clickable="true" android:cacheColorHint="#00000000" android:background="#00000000"> </ListView> As you can see android:listSelector="#99000000" but the "black alpha" color is applied to the entire list, not the selected item. So this is what I have now but the entire list still turns black ::listview_background.xml <?xml version="1.0" encoding="utf-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android"> <item android:state_enabled="false" android:state_focused="true" android:drawable="@drawable/list_normal" /> <item android:state_pressed="true" android:drawable="@drawable/list_pressed" /> <item android:state_focused="true" android:drawable="@drawable/list_active" /> </selector> ::colors.xml <resources> <drawable name="list_normal">#96FFFFFF</drawable> <drawable name="list_active">#66000000</drawable> <drawable name="list_pressed">#CA000000</drawable> </resources> ::the xml tag in my list android:listSelector="@drawable/listview_background"

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• How do you send an extended-ascii AT-command (CCh) from Android bluetooth to a serial device?

  - by softex

  This one really has me banging my head. I'm sending alphanumeric data from an Android app, through the BluetoothChatService, to a serial bluetooth adaptor connected to the serial input of a radio transceiver. Everything works fine except when I try to configure the radio on-the-fly with its AT-commands. The AT+++ (enter command mode) is received OK, but the problem comes with the extended-ascii characters in the next two commands: Changing the radio destination address (which is what I'm trying to do) requires CCh 10h (plus 3 hex radio address bytes), and exiting the command mode requires CCh ATO. I know the radio can be configured OK because I've done it on an earlier prototype with the serial commands from PIC basic, and it also can be configured by entering the commands directly from hyperterm. Both these methods somehow convert that pesky CCh into a form the radio understands. I've have tried just about everything an Android noob could possibly come up with to finagle the encoding such as: private void command_address() { byte[] addrArray = {(byte) 0xCC, 16, 36, 65, 21, 13}; CharSequence addrvalues = EncodingUtils.getString(addrArray, "UTF-8"); sendMessage((String) addrvalues); } but no matter what, I can't seem to get that high-order byte (CCh/204/-52) to behave as it should. All other (< 127) bytes, command or data, transmit with no problem. Any help here would be greatly appreciated. -Dave

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• uint64_t has incorrectly reached 18,446,744,071,590,568,320

  - by user3400450

  Whenever I input an age of 65 or less, I get a number somewhere less than 2,100,000. However, when I input an age of 68 or higher, the result is instantly put at 18,446,744,071,590,568,320, which is the maximum value for uint64_t. I have no idea why there is this jump in results. It works fine all the way until about 2,100,000. // How many seconds have I lived? #include <stdio.h> #include <string> #include <cstdint> using namespace std; string addCommas(uint64_t answer); int main () { int seconds = 60, minutes = 60, hours = 24, days = 365; int years; uint64_t secondsLived, secondsAwake; printf("How many years have you lived? "); scanf("%d",&years); secondsLived = seconds*minutes*hours*days*years; secondsAwake = (float)secondsLived*0.666; printf("\nYou have existed for %s seconds\n",addCommas(secondsLived).c_str()); printf("You have been awake for %s seconds\n",addCommas(secondsAwake).c_str()); } string addCommas(uint64_t answer){ string num = to_string(answer); int insertplace = (int)num.length() - 3; while (insertplace > 0) { num.insert(insertplace, ","); insertplace-=3; } return num; } Here are a couple outputs: How many years have you lived? 67 You have existed for 2,112,912,000 seconds You have been awake for 1,407,199,392 seconds How many years have you lived? 69 You have existed for 18,446,744,071,590,568,320 seconds You have been awake for 12,285,531,553,090,562,048 seconds

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• changes in main.xml are not reflected in the android app in netbeans

  - by nitish712

  I am new to android apps. I am using the netbeans 7.0.1 IDE to develop android apps. I have written the following code in the main java file: package com.test.helloworld; import android.app.Activity; import android.os.Bundle; import android.widget.TextView; public class helloworld extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); TextView t1=new TextView(this); t1.setText("hello world..!!!!"); setContentView(t1); } } This was working fine. I edited the main.xml file to display a textfield and button as follows: <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" > <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/button_send"/> <EditText android:id="@+id/edit_message" android:layout_width="wrap_content" android:layout_height="wrap_content" android:hint="@string/edit_message"/> </LinearLayout> Of course I have added all the corresponding strings in strings.xml. But when I try to run my app these weren't displaying... :( . I mean the same string that was displayed previously was being displayed. Can anybody figure out what is the mistake? thanx...

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• How can I layout a sidebar or pullquote?

  - by Rich

  I have 4 divs in a fixed width layout: a, b, c, and d, and they are ordered in the html like this: <div id="a"> </div> <div id="b"> </div> <div id="c"> </div> <div id="d"> </div> Using CSS, I want them to be laid out with divs a, b, and d in a vertical column, and div c to the right of and top-aligned with div b, like this: aaa aaa aaa bbbccc bbbccc bbbccc ddd ddd ddd I need this layout to work even though the divs contain unknown content, and so could be of varying length: aaa aaa aaa bbbccc bbbccc dddccc dddccc ddd or: aaa aaa aaa bbbccc bbb bbb ddd ddd ddd or even (if possible): aaa aaa bbbccc dddccc eeeccc eee I can't simply float div c to the right and then move it up, because, without using Javascript, I don't know the height of div b, and so don't know how much to move it up by. Is this possible in HTML and CSS, without reordering the divs?

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• Floats not clearing properly in IE - how to fix?

  - by Stomped

  I've been banging my head for about an hour now, and I've distilled the problem down to the simplest example I can think of that shows the problem. The CSS/HTML <style> #T div { float: left; } ._b { clear: left; } </style> <div id='T'> <div class='_a'>*</div> <div class='_b'>*</div> <div class='_c'>*</div> <div class='_d'>*</div> </div> IE7 *** * FF, Chrome, Opera * *** The result in FF/Chrome/Opera is what I'd expect. There's no adding more mark-up to fix this and I'm absolutely befuddled on to how to make it work properly in IE. It gets really ugly when you have say, 3 all on a row to themselves and then 3 meant to be on the same line -- the extra 2 end up on the first row. I really hope someone knows the work-around for this.

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• LayoutInflater ignoring parameters ?

  - by TiGer

  Hi, I have the following xml object representing a ImageButton <?xml version="1.0" encoding="utf-8"?> <ImageButton xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/genreCellItemId" android:layout_weight="1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center" android:paddingLeft="5.0dip" android:paddingRight="5.0dip"> </ImageButton> I try to inflate it and add it to a TableRow with the following code : LayoutInflater inflater= this.getLayoutInflater(); TableLayout grid = (TableLayout)findViewById(R.id.bodyTableLayout); TableRow row = (TableRow)inflater.inflate(R.layout.genre_row, null); View myButton = (View)inflater.inflate(R.layout.genre_cell, null); row.addView(tempButton, new TableRow.LayoutParams()); grid.addView(row, new TableLayout.LayoutParams()); Ok so I noticed that it didn't look as expected, so I fire up the Hierarchy Viewere and noticed that the ImageButton's actually have an layout_width = FILL_PARENT instead of WRAP_CONTENT, also the layout_gravity is NONE and there is no padding to be seen... Do, am I inflating it wrongly ? Or is maybe the new TableRow.LayoutParams() part doins omething wrong ?

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• Value types of variable size

  - by YellPika

  I'm trying to code a small math library in C#. I wanted to create a generic vector structure where the user could define the element type (int, long, float, double, etc.) and dimensions. My first attempt was something like this... public struct Vector<T> { public readonly int Dimensions; public readonly T[] Elements; // etc... } Unfortunately, Elements, being an array, is also a reference type. Thus, doing this, Vector<int> a = ...; Vector<int> b = a; a[0] = 1; b[0] = 2; would result in both a[0] and b[0] equaling 2. My second attempt was to define an interface IVector<T>, and then use Reflection.Emit to automatically generate the appropriate type at runtime. The resulting classes would look roughly like this: public struct Int32Vector3 : IVector<T> { public int Element0; public int Element1; public int Element2; public int Dimensions { get { return 3; } } // etc... } This seemed fine until I found out that interfaces seem to act like references to the underlying object. If I passed an IVector to a function, and changes to the elements in the function would be reflected in the original vector. What I think is my problem here is that I need to be able to create classes that have a user specified number of fields. I can't use arrays, and I can't use inheritance. Does anyone have a solution? EDIT: This library is going to be used in performance critical situations, so reference types are not an option.

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• Add a hover effect to all elements of a class [closed]

  - by Em Sta

  I made a simple website, it looks like this: But, as you can see, the hover effect only works on where the mouse actually is! (here ipsum) But my aim is that the hover works on all elements! So i added a class with the hover effect p.hov:hover, but see it yourself: <span id="motha"> <blockquote> <p class="hov">Lorem</p> <p class="hov" >ipsum</p> <p class="hov" >dolor</p> <p class="hov" >sit</p> <p class="hov" >amen</p> </blockquote> </span> p { color:#f2f2f2; background:#ff4a4a; font-size: 75px; line-height: 74px; font-weight:700; margin: 0 5px 24px; float:left; padding: 10px; margin: 0 5px 24px; font-family: 'Route', serif; } p.hov:hover {box-shadow: 1px 1px #666, 2px 2px #666, 3px 3px #666;} Sorry for my english! And Thanks!

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• Xml updating with linq not working when quering

  - by user1734230

  I have problem i'm trying to update a specific part of the XML with the linq query but it doesn't work. So i an xml file: <?xml version="1.0" encoding="utf-8"?> <DesignConfiguration> <Design name="CSF_Packages"> <SourceFolder>C:\CSF_Packages</SourceFolder> <DestinationFolder>C:\Documents and Settings\xxx</DestinationFolder> <CopyLookups>True</CopyLookups> <CopyImages>False</CopyImages> <ImageSourceFolder>None</ImageSourceFolder> <ImageDesinationFolder>None</ImageDesinationFolder> </Design> </DesignConfiguration> I want to select the part where the part where there is Design name="somethning" and get the descendants and then update the descendants value that means this part: <SourceFolder>C:\CSF_Packages</SourceFolder> <DestinationFolder>C:\Documents and Settings\xxx</DestinationFolder> <CopyLookups>True</CopyLookups> <CopyImages>False</CopyImages> <ImageSourceFolder>None</ImageSourceFolder> <ImageDesinationFolder>None</ImageDesinationFolder> I have this code: XDocument configXml = XDocument.Load(configXMLFileName); var updateData = configXml.Descendants("DesignConfiguration").Elements().Where(el => el.Name == "Design" && el.Attribute("name").Value.Equals("AFP_GRAFIKA")).FirstOrDefault(); configXml.Save(configXMLFileName); I'm getting the null data in the updateData varibale. When I'm trying the Descendat's function through QuickWatch it also returns a null value. When I'm checking the configXML variable it has data that is my whole xml. What am I doing wrong?

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• Preserving the order of annotations

  - by Ragunath Jawahar

  When obtaining the list of fields using getFields() and getDeclaredFields(), the order of the fields in a Java class is undefined. I need this order in my validation library. Since the order is not preserved (though some claim that the order is preserved in JDK 6 and above but is not guaranteed across VMs). I cannot speculate on this because the order of annotations across fields is absolutely essential for the library. One way to get around this is to have an order or an index attribute in my Annotation. What worries me is that the code could become a bit cumbersome for maintaining in the following case. If the use wants to insert a new annotated field then, he might have to renumber all the other annotations in the class. I could have the order or index as a floating point number - float or double but , it wouldn't look good to have order such as 1, 1.5, 2, etc., What would be an elegant solution for this problem? Here is a example code so that you can get an idea about the problem: @Required @TextRule (minLength = 6, message = "You need at least 6 characters.") private EditText usernameEditText; @Password private EditText passwordEditText; @ConfirmPassword private EditText confirmPasswordEditText; @Email private EditText emailEditText;

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• jquery slideToggle's position

  - by skargor

  I have a menu div to put the menu list inside <!--menu--> <a href="#"><div id="menu-tab">Menu</div></a> <div id="menu"> <ul> <li><a href="#">a</a></li> <li><a href="#">b</a></li> <li><a href="#">c</li> </ul> </div> for the css #menu { width: 220px; border: 2px solid #004990; float: right; margin-right: 15px; margin-top: -52px; } here is the javascript/jquery $('#menu-tab').click(function(){ $("#menu").slideToggle("normal"); }); becuase margin-top: -52px;(which I control the menu position in the page), therefore each time when I click the menu tab, the #menu will slide from -52px. how can I let it slide from 0px?

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• CSS to Make 2 Column Content Areas

  - by Joe Majewski

  I'm trying to stray away from using tables to form the layout of my content, and I can think of two alternatives that I'd like to better learn: (1) styling list items to be side-by-side, and (2) using div blocks that float onto the same line. Both of these would have their own uses for what I'm working on. I'm already using div tags to form the entire layout of my three-column template, but what I need to do now is a bit different. In case it helps, my project can be found here. In short, here's my question; how would I style a div so that the width of it is 50% of the width of the area it occupies, rather than 50% of the width of the page? As for my other question, what would be the best approach to styling list items so that they are side-by-side? I'm working on a registration script now, and instead of using a table with "Username" on the left and the input text on the right, I can use two list items. It's late and I've been working on this project of mine for about 8 hours straight now, so I apologize if I'm asking anything confusing. Feel free to ask me any questions about what I'm trying to do. Thanks, friends. :)

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• Display attribute from XML using PHP

  - by user560411

  Hello. I need to display the id attribute of CD from the following XML file. I display correctly everything except the id. Any help would be appreciate. display code <?php $doc = new DOMDocument(); $doc->load( 'insert.xml' ); $CATEGORIES = $doc->getElementsByTagName( "CD" ); foreach( $CATEGORIES as $CD ) { $TITLES = $CD->getElementsByTagName( "TITLE" ); $TITLE = $TITLES->item(0)->nodeValue; $BANDS= $CD->getElementsByTagName( "BAND" ); $BAND= $BANDS->item(0)->nodeValue; $YEARS = $CD->getElementsByTagName( "YEAR" ); $YEAR = $YEARS->item(0)->nodeValue; echo "<b>$TITLE - $BAND - $YEAR\n</b><br>"; } ?> XML <?xml version="1.0" encoding="utf-8"?> <MY_CD> <CATEGORIES> <CD id="3231"> <TITLE>NEVER MIND THE BOLLOCKS</TITLE> <BAND>SEX PISTOLS</BAND> <YEAR>1977</YEAR> </CD> <CD id="2453"> <TITLE>NEVERMIND</TITLE> <BAND>NIRVANA</BAND> <YEAR>1991</YEAR> </CD> </CATEGORIES> </MY_CD>

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• iPhone settings not honoured

  - by winsmith

  My iPhone app has the following problem: Freshly installed, when I read out my "Play Sound" preference with the following code: defaults = [NSUserDefaults standardUserDefaults]; NSLog(@"Play Sounds? %d", [defaults boolForKey:@"play_sounds_preference"]); The setting always reads out as false, even though the default setting is set to true. Any ideas? Here is my Root.plist: <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"> <plist version="1.0"> <dict> <key>StringsTable</key> <string>Root</string> <key>PreferenceSpecifiers</key> <array> <dict> <key>Type</key> <string>PSGroupSpecifier</string> <key>Title</key> <string>General Settings</string> </dict> <dict> <key>Type</key> <string>PSToggleSwitchSpecifier</string> <key>Title</key> <string>Sounds</string> <key>Key</key> <string>play_sounds_preference</string> <key>DefaultValue</key> <true/> </dict> </array> </dict> </plist> When the user opens the Settings.app and navigates to my app's name, THEN the setting reads out as true, even if the user doesn't change anything.

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