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• How does NSValue do its magic?

  - by Paperflyer

  I have an MVC application. The model has a property that is a struct NSSize. It is writable like this: - (void)setSize:(NSSize)aSize; The view sets this NSSize using key-value-coding. However, you can not key-value-code a struct, so I wrapped it in an NSValue-object like this: [theView setValue:[NSValue valueWithSize:mySize] forKey:@"theModel.size"]; To my understanding, this should not work since the accessor expects a struct and not an NSValue. But it works perfectly. Magically. How is this possible?

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• IE Problem: Jagged Scrolling and Dragging Inside Large Viewport

  - by br4inwash3r

  My site is a single page website with a very large "canvas" size. and to navigate around the site i'm using jquery scrollTo and jquery Dragscrollable plugin. in IE 7 & 8 the scrolling/dragging movement is very jagged. at first i thought it was my script or some other plugin that's causing this. but after i stripped down everything it's still the same. i've tried a few tips i've found around here. but none is really working for me. i know i should be asking this question to the plugin developers. i did.. i just thought maybe you guys have some other solution for this issue. here's the URL to the demo site: http://satuhati.com/bare/template/ really appreciate any help u can give :) thx..

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• Silverlight 4 desktop application sometimes zooms when touching it... and cannot zoom out

  - by TimothyP

  Hi, I have a Silverlight 4 desktop application which I control using a touchscreen (on an HP Touchsmart). Most of the time it works fine but sometimes when clicking something everything just zooms in and every time it happens things get bigger and bigger. The only way to get the normal size again is by restarting the application. Has anybody got any idea what might be causing it ? Does not seem to happen in browser mode. Is there a way to prevent zooming? Thnx

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• Safari ignores input type="file" on server post

  - by Jon

  I have a real problem with a classic ASP page. The page allows the user to upload a document and save it to the database. The intial page posts to another asp page which saves down to the db. This works on IE and Firefox. However on Safari it fails. I've debugged the problem and it boils down to the fact that of all the controls that the server page has access to, only 1 control is missing. This happens to be this: <input type="file" size="40" id="myfile" name="myfile" /> So I'm wondering why safari would decide to not give me access to this control (using asp's Request("") ) and why it works in FF and IE. I have some debug code which writes out all controls and it doesn't see this control. p.s. I hate Web development

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• How to free memory from a list of classes

  - by Jason Rowe

  Say I have two classes created work and workItem. CWorker *work = new CWorker(); CWorkItem *workItem = new CWorkItem(); The work class has a public list m_WorkList and I add the work item to it. work->m_WorkList.push_back(workItem); If I just delete work if(work != NULL) delete work; Do I need to loop through the list in the destructor like the following? Any better way to do this? Could I use clear instead? while(m_WorkList.size()) { CWorkItem *workItem = m_WorkList.front(); m_WorkList.pop_front(); if(workItem) delete workItem; }

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• Default input and output buffering for fopen'd files?

  - by Evan Teran

  So a FILE stream can have both input and output buffers. You can adjust the output stream using setvbuf (I am unaware of any method to play with the input buffer size and behavior). Also, by default the buffer is BUFSIZ (not sure if this is a POSIX or C thing). It is very clear what this means for stdin/stdout/stderr, but what are the defaults for newly opened files? Are they buffered for both input and output? Or perhaps just one? If it is buffered, does output default to block or line mode?

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• Problems wih minSdkVersion 1.5

  - by Tebam

  Hello, we have a problem related to the manifest file and the property "android:minSdkVersion". The issue is: If our platform is 2.0 and we use the property "android:minSdkVersion=3" (3 = sdk 1.5) the graphics get corrupted (In details, the application's resolution get reduced to a 2/3 part of the original size, this is, when the resolution should be 480x720, it becomes in a 320x480). This is happening on the Android emulator, and on the devices Droid/Milestone (Which are platforms 2.0). When we switch the property to "android:minSdkVersion=4" (4 = sdk 1.6) the problem gets solved, but when we want to put that version on platform 1.5, Android doesn't allow us to install it. It would help us to know any conflict regarding graphics within the 2.0 sdk, or any known problem around the "android:minSdkVersion" in the manifest. Thanks!

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• maintain dialog center with dynamic content

  - by mcgrailm

  I would have a dialog with the following $("#statusbox").dialog({ autoOpen: false, bgiframe: true, modal: true, width: 'auto', height:'auto', title:"Check Order Status", buttons: { Find: function() { get_status(); }, Close: function() { $(this).dialog('close'); } } }); and when the user hits the find button it runs ajax and returns orders to the dialog and it get dynamically re-sized but it only extends the box down. Is there way to make the box extend up and down so that the dialog remains centered ? also if there was enough content then it could potentially go beyond the bounds of the page so I would think I could use a max height to prevent that but what do I do if they re-size the window ? thanks for any help

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• Socket : can an asynchronous Receive returns without reading all the bytes I asked for?

  - by NorthWind

  Hi; I was reading an article on Vadym Stetsiak's blog about how to transfer variable length messages with async sockets (url: http://vadmyst.blogspot.com/2008/03/part-2-how-to-transfer-fixed-sized-data.html). He says : What to expect when multiple messages arrive at the server? While dealing with multiple messages one has to remember that receive operation can return arbitrary number of bytes being read from the net. Typically that size is from 0 to specified buffer length in the Receive or BeginReceive methods. So, even if I tell BeginReceive to read 100 bytes, it may read less than that and returns??? I am developing a network-enabled software (TCP/IP), and I always receive the same exact number of bytes I asked for. I don't even understand the logic : why would Receive completes asynchronously if it didn't get every byte I asked for ... just keep waiting. Maybe it has something to do with IP vs TCP? Thank you for your help.

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• Hash Table: Should I increase the element count on collisions?

  - by Nazgulled

  Hi, Right now my hash tables count the number of every element inserted into the hash table. I use this count, with the total hash table size, to calculate the load factor and when it reaches like 70%, I rehash it. I was thinking that maybe I should only count the inserted elements with fills an empty slot instead of all of them. Cause the collision method I'm using is separate chaining. The factor load keeps increasing but if there can be a few collisions leaving lots of empty slots on the hash table. You are probably thinking that if I have that many collisions, maybe I'm not using the best hashing method. But that's not the point, I'm using one of the know hashing algorithms out there, I tested 3 of them on my sample data and selected the one who produced less collisions. My question still remains. Should I keep counting every element inserted, or just the ones that fill an empty slot in the Hash Table?

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• How can I get the photo saved in Android cell phone in my application

  - by ZHAO Xiaojian

  I want display the images saved in the cell phone in my own application. now I am using MediaStore.Images.Media to do this. I can get the name, size and other information of the images. but i don't know how to get the bitmap? can u help me. thx. There is a method getBitmap(ContentResolver cr, Uri url), but i don't know how to get the Uri of one certain image. thx.

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• GoTo statements, and alternatives (help me please im new) (VB.net)

  - by qais

  Basically I posted a code snippet on a forum asking for help and people pointed out to me that using GoTo statements is very bad programming practise so I'm just wondering, why is it bad? And also what alternative is there to use, like for example in this program ive done for homework the user has to input their date of birth and if the month/date/year are invalid or unrealistic(using if statements checking the integer inputs size, if theres any better way to do this i'd appreciate if you could tell me that also :D) then how would i be able to loop back to ask them again? heres a little extract of my code retryday: Console.WriteLine("Please enter the day you were born : ") day = Console.ReadLine If day > 31 Or day < 1 Then Console.WriteLine("Please enter a valid day") GoTo retryday End If

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• unable to apply jquery filter

  - by Pradyut Bhattacharya

  Hi I m un-animating a list using this code... function unanimate_li(){ $li.filter(':last') .animate({ height: 'hide', opacity: 'hide' }, 1000, function(){ unanimate_li(); }); $li = $li.not(':last'); } I have set up the li using this code $li = $("ol#update > li"); $li = $li.filter(':gt(4)').filter(':lt('+ size + ')'); Now when i try to do this i cannot get the 5th li(4th on zero based) to remove It removes the sixth li The example here And when the second time i do the update it goes on to infinite loop I cannot understand why

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• changing the htaccess file in php

  - by tibin mathew

  Hi, I want to change the maximum file upload size in my website, for this i'm going to add some code lines in my .htaccess file. i have searched in google and i got the lines of code to add in .htaccess file. But i don't know exactly were to add that lines of code . Below is the lines of code currently in my .htaccess file code below -FrontPage- IndexIgnore .htaccess /.?? *~ *# /HEADER */README* */_vti* order deny,allow deny from all allow from all order deny,allow deny from allenter code here AuthName www.mysite.com AuthUserFile /www/htdocs/domains/s11/01712/www.mysite.com/webdocs/_vti_pvt/service.pwd AuthGroupFile /www/htdocs/domains/s11/01712/www.mysite.com/webdocs/_vti_pvt/service.grp AddHandler php5-script .php Here is the code to add php_value post_max_size 50M php_value upload_max_filesize 50M how to add this lines of code in .htaccess file and where?? Please help me.. Thanks

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• GeoDjango: is there an out-of-the-box way to generate clusters of points?

  - by vaughnkoch

  Hi, I'm trying to compute clusters on a set of points in Python, using GeoDjango. The problem: Given a set of points, output a set of clusters of those points. (i'm fine specifying # of clusters/cluster size/distance in advance to simplify) There are a few solutions on the web to do clustering, so it's a well known problem. I thought that GeoDjango would handle these types of problems out of the box, but it's not clear how - I've searched the GeoDjango documentation, Google, and a few other places, but couldn't find anything. Before I roll my own clustering solution, I thought I'd ask to see if there's a straightforward way to do this using GEOS or another package within GeoDjango.

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• The height and width properties on my Flex 4 app arn't working

  - by ben

  In the opening application tag of my Flex 4 app, I set the width and height properties as follows: <?xml version="1.0" encoding="utf-8"?> <s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark" xmlns:mx="library://ns.adobe.com/flex/mx" creationComplete="init()" backgroundColor.mainState="0x303030" xmlns:components="components.*" width="798" height="240"> What I go into Design mode in Flash Builder 4, the app is the correct size. But when I embed the .swf file into a HTML page, the application's background color covers the whole screen, and when the Flash Player Settings message box pops up it is outside of the area I defined in the code above. What am I doing wrong? Thanks for reading.

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• Iterating backward

  - by MBennett

  Suppose I have a vector<int> myvec and I want to loop through all of the elements in reverse. I can think of a few ways of doing this: for (vector<int>::iterator it = myvec.end() - 1; it >= myvec.begin(); --it) { // do stuff here } for (vector<int>::reverse_iterator rit = myvec.rbegin(); rit != myvec.rend(); ++rit) { // do stuff here } for (int i = myvec.size() - 1; i >= 0; --i) { // do stuff here } So my question is when should I use each? Is there a difference? I know that the first one is dangerous because if I pass in an empty vector, then myvec.end() - 1 is undefined, but are there any other hazards or inefficiencies with this?

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• How to take a screenshot with Mono C#?

  - by vagabond

  I'm trying to use use code get a screenshot in Mono C# but I'm getting a System.NotImplementedException when I call CopyFromScreen. My code works with .NET, so is there an alternate way of getting a screenshot using Mono? Bitmap bitmap = new Bitmap(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height); Graphics graphics = Graphics.FromImage(bitmap as Image); graphics.CopyFromScreen(0, 0, 0, 0, bitmap.Size); System.IO.MemoryStream memoryStream = new System.IO.MemoryStream(); bitmap.Save(memoryStream, imageFormat); bitmap.Save(@"\tmp\screenshot.png", ImageFormat.Png); I am using Mono JIT compiler version 2.4.2.3 (Debian 2.4.2.3+dfsg-2)

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• How to shrink-to-fit an std::vector in a memory-efficient way?

  - by dehmann

  I would like to 'shrink-to-fit' an std::vector, to reduce its capacity to its exact size, so that additional memory is freed. The standard trick seems to be the one described here: template< typename T, class Allocator > void shrink_capacity(std::vector<T,Allocator>& v) { std::vector<T,Allocator>(v.begin(),v.end()).swap(v); } The whole point of shrink-to-fit is to save memory, but doesn't this method first create a deep copy and then swaps the instances? So at some point -- when the copy is constructed -- the memory usage is doubled? If that is the case, is there a more memory-friendly method of shrink-to-fit? (In my case the vector is really big and I cannot afford to have both the original plus a copy of it in memory at any time.)

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• Download estimator control using JavaScript and Ajax

  - by Anil Namde

  I would like to implement the download estimator using the JavaScript and the Ajax. I have gone trough Google to find the existing implementations for the download estimator and i found most of the time asking user bandwidth and then calculating the number is strategy. It good approach and there is hardly anything on reliable to get the estimated time right. What i would like to try is use Ajax to request file size 100KB - 200 KB and do the maths get the number and update the display. Now this is surrounded with so many questions like network, number of packets formed, proxies etc ? These all factors are sufficient to turn down the approach. But THIS IS HOW I HAVE TO DO THIS ? Now i would like here inputs from you all to make it better (as good discussion)? what all can be added to this ? Can we get to know bandwidth user using without asking ?

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• Intermec PF8t printer - print output with wrong orientation

  - by Xience

  I am using an Intermec PF8t for label printing. My labels are the size of 40mm(width) and 20mm (height) and they are rendered in a crystal report from where I print them dynamically. The problem is that no matter what the page orientation I specify either in crystal report or in printer settings, the result is printed vertically(i.e. my output gets rotated by 90 degrees) whereas I want it to print horizontally (as in normal left to right printing) . Strangely, when I print the label at design time, everything prints as it should. One important thing to mention is that i print my label report programmatically using crystal reprot's PrintToPrinter() method. Any ideas... I have pretty much exhausted all the information available at intermec's portal but to no avail.

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• CSS issue with IE

  - by Azzyh

  Please check this: http://img62.imageshack.us/img62/3598/ieff.png why is it more height than in FF.. i want it to be like FF in IE #message { position: absolute; top: 0; left: 0; z-index: 105; background-color: #034678; font-family: Arial,Helvetica,sans-serif; font-size: 100%; text-align: center; font-weight: bold; border-bottom: 2px solid #FFF; height: 26 px; width: 100%; }

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• ASP.NET connection pool question

  - by James Evans

  Does the same connection string used on two different physical servers hosting different web applications that talk to the same database draw connections from the same connection pool? Or are pooled connections confined to at the application level? I ask because I inherited a 7 year old .NET 1.1 web application which is riddled with in-line SQL, unclosed and undisposed sql connection and datareader objects. Recently, I was tasked to write a small web app that is hosted on another server and talks to the same database and therefore used the same database connection string. I created a LINQ object to read and write the one table required by the app. Now the original .NET 1.1 app is throwing exceptions like "Timeout expired. The timeout period elapsed prior to obtaining a connection from the pool. This may have occurred because all pooled connections were in use and max pool size was reached." Maybe these are unreleated, but wanted to get your opinions to make sure I cover all my bases. Thanks!

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• Can any genius out there turn this code from generating permutation to generating combination?

  - by mark

  #include <string> int main(int,char**) { std::string default_str = "12345"; int perm=1, digits=default_str.size(); for (int i=1;i<=digits;perm*=i++); for (int a=0;a<perm;a++) { std::string avail=default_str; for (int b=digits,div=perm;b>0; b--) { div/=b; int index = (a/div)%b; printf("%c", avail[index] ); avail.erase(index,1) ; } printf("\n"); } printf("permutations:%d\n",perm); while(1); }

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• Simple vector program error

  - by Codeguru

  Hi iam new to c++ and iam trying out this vector program and i am getting the following error: error: conversion from test*' to non-scalar typetest' requested| Here is the code include include include include using namespace std; class test{ string s; vector <string> v; public: void read(){ ifstream in ("c://test.txt"); while(getline(in,s)) { v.push_back(s); } for(int i=0;i<v.size();i++) { cout<<v[i]<<"\n"; } } }; int main() { cout<<"Opening the file to read and displaying on the screen"< }

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