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• printf not passing correct Hex Address to stack

  - by kriss

  I have a hickup in using printf . I am on ubuntu 10.04. Basically i have a C program asking for some input and then prints it back. It is OK for printing something after inputing. I tried to insert some Hex Address to Stack by following format:- printf "hello world!\x12\x23\x34" | ./input1 But i don't know what is the problem. If i give only string beyond 12 bytes it overwrites BUT If I give hex address(through printf), it doesn't overwrite on return address. Instead it stores some other thing. Could anyone help??? I can't proceed further becoz of this. Thanks in advance

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• Doctrine inserts when it should update

  - by Goran Juric

  I am trying to use do the most simple update query but Doctrine issues an INSERT statement instead of an UPDATE. $q = Doctrine_Query::create() ->from('Image i') ->where('id = ?'); $image = $q->fetchOne($articleId, Doctrine_Core::HYDRATE_RECORD); $image->copyright = "some text"; $image->save(); I have also tried using the example from the manual, but still a new record gets inserted: $userTable = Doctrine_Core::getTable('User'); $user = $userTable->find(2); if ($user !== false) { $user->username = 'Jack Daniels'; $user->save(); } edit: This example from the manual works: $user = new User(); $user->assignIdentifier(1); $user->username = 'jwage'; $user->save(); The funny thing is that I use this on another model and there it works OK. Maybe I have to fetch the whole array graph for this to work (I have another model in a one to many relationship)?

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• Jquery: Extracting the hrefs from multiple links on a page.

  - by Pete B

  Hi, I discovered that .attr() only applies to the first matched element on the page! So, I've been trying to get the hrefs from all the matched elements on a page, but to no avail. Here's what I tentatively wrote: var thelinks = $("td a").each(function(){ $(this).attr("href"); document.write(thelinks); }); I used document.write just to see what was going on, and I got a long list of "undefinedundefinedundefined" What I'm trying to do is extract the hrefs from each td a and then use ajax to visit those pages and do other stuff. I can get it work fine when it's dealing with just one link, but this multiple elements thing I can't figure out. Any help rendered is appreciated, I'm a novice to the world of Javascript and Jquery.

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• database design suggesion

  - by Bharanikumar

  Hi , am going to start new travel site, I want some advise from guru's regarding database design , Things coming to picture are, Book taxi online , This is the core idea, So i like to implement lot of jquery,ajax stuff in my site , Main thing site must run veryt fast,safe,security, In mysql , which typw shall i use, MYISAM OR INNODB Which is best type for ajax works, fast,safe ,secure ,performance view . This is my demo site, Just look this site, i implemented some ajax stuff here, my-url In this site please choose the postcode in the taxifrom tab, It ask you value please enter, just enter nw7 , See How long it will take for response,some time no response and system goes to hang or idle mode, Also please look the diversion , select No diversion, There you will list of textbox, enter the nw3 then hit the search icon , See after 80seconds only , you will get response from DB, See this too bad response ... This is DB , my Database type if myisam ,no idexing , no fulltext and nothing...no constraints, So please advise me , which database type i choose, Myisam or innodb, Thanks Bharanikumar

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• Resources/Teaching ideas to teach computers to kids

  - by Shravan

  A small initiative from my work place plans to teach very basic computers to not so fortunate kids. I was looking for some very basic topics/resources. These kids are very young and have not seen/worked with a computer before. The fun factor should not be lost and hence I don't want it to be rigorous, just plain, what is computer, keyboard, mouse, browser, where to look for what (google.com) and so on. Has any-one done this sort of thing before, if yes, could you point me to some resources.

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• Modern Web Development + General question

  - by ritu

  I have been given a nasty wake up a while ago when I discovered that my 10 years of experience was really equivalent of about 4 (got trapped in a big company doing the same thing over and over without realizing it) and is now paying a huge price. Question 1: I did servlets/JSP programming back in the day (2001-2003). Since then there have been libraries like GWT, YUI, etc. Is JSP still the preferred way of building web apps using Java? Question 2: Because I enjoyed what I was doing and needed to pay the bills, I didn't realize that the ground below me has shifted. How do avoid this in the future? My years of C system programming doesn't seem to matter a lot now to the young guys who talk about design patterns.

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• a simple secenerio to implement java script asp.net C#, question rephrased

  - by user287745

  i had asked this question before but got no answer correct. so, this is a simple thing textbox.text='user typing'; button:-store the value to a variable and a database. very simple nothing to it but there should be no post back, that is the page must not load again, try ajax? tried it not working i must a lot of time trying to implement this using java script ajax and read many many post, but for some reason i cannot implement the functionality correctly. please help. thank you

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• Running GUI application in the Windows service mode

  - by Leonid

  I'm writing a server running as a Windows service that by request invokes Firefox to generate a pdf snapshot of a webpage. I know it is a bad idea to run a GUI program in service mode, but the server nature of my program restricts from running it in the user mode. Running a user-level 'proxy' also is not an option, since there might be no interactive user logged-in on the machine with the server running. In my experiments Firefox successfully produced pdf when the service was running under a user account that was already logged-in. Obviously it didn't work in other cases: for Local System and user accounts that weren't logged-in. Under LocalSystem with 'Allow service to interact with desktop' option enabled I could see the Firefox started that reports that it's unable to find a printer. Since it wouldn't be practical to require an opened user session for the pdf server to run, is there any workaround for this except running the whole thing from a virtual machine?

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• Complicated conditional SQL query

  - by DevAno1

  I'm not even sure if it's possible but I need it for my Access database. So I have following db structure : Now I need to perform a query that takes category_id from my product and do the magic : - let's say product belongs to console (category_id is in table Console) - from console_types take type_id, where category_id == category_id - but if product belongs to console_game (category_id is in table console_game) - from console_game take game_cat_id, where category_id == category_id I'm not sure if mysql is capable of such thing. If not I'm really f&%ranked up. Maybe there is a way to split this into 2,3 separate queries ?

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• Leak caused by fread

  - by Jack

  I'm profiling code of a game I wrote and I'm wondering how it is possible that the following snippet causes an heap increase of 4kb (I'm profiling with Heapshot Analysis of Xcode) every time it is executed: u8 WorldManager::versionOfMap(FILE *file) { char magic[4]; u8 version; fread(magic, 4, 1, file); <-- this is the line fread(&version,1,1,file); fseek(file, 0, SEEK_SET); return version; } According to the profiler the highlighted line allocates 4.00Kb of memory with a malloc every time the function is called, memory which is never released. This thing seems to happen with other calls to fread around the code, but this was the most eclatant one. Is there anything trivial I'm missing? Is it something internal I shouldn't care about? Just as a note: I'm profiling it on an iPhone and it's compiled as release (-O2).

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• migrate database from sybase to mysql

  - by jindalsyogesh

  I have been trying to migrate a database from sybase to Mysql. This is my approach: Generate pojo classes from my sybase database using hibernate in eclipse Use these pojo classes to generate the schema in mysql database Then somehow migrate the data from sybase to mysql I guess this approach should work??? Please let me know if there is any better or easier approach. The thing is I am not even able to get the first step done. I added hibernate plugin in eclipse from this link: [http://download.jboss.org/jbosstools/updates/stable/][1] I added sybase jar file to my project classpath Then I added hibernate console configuration file Then I added hibernate configuration file Then I added hibernate code generation configuration When I try to run the code generation configuration file, I am getting java.lang.NullPointerException and I have no idea how to fix it. I searched a lot of forums, tried to google it, but I not able to find any solution. Can anybody tell me what mistake I am making here or point to some hibernate tutorial for eclipse??

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• Is there a pattern that allows a constructor to be called only from a specific factory and from nowh

  - by willem

  We have a class, say LegacyUserSettingsService. LegacyUserSettingsService implements an interface, IUserSettingsService. You can get an instance of the IUserSettingsService by calling our ApplicationServicesFactory. The factory uses Spring.NET to construct the concrete LegacyUserSettingsService. The trouble is that new developers sometimes do their own thing and construct new instances of the LegacyUserSettingsService directly (instead of going via the factory). Is there a way to protect the constructor of the concrete class so it can only be called from the factory? A well-known pattern perhaps? Note that the concrete class resides in a different assembly (separate from the Factory's assembly, so the internal keyword is not a solution). The factory assembly references the other assembly that contains the concrete class. Any ideas?

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• Is it bad practice to have a long initialization method?

  - by Paperflyer

  many people have argued about function size. They say that functions in general should be pretty short. Opinions vary from something like 15 lines to "about one screen", which today is probably about 40-80 lines. Also, functions should always fulfill one task only. However, there is one kind of function that frequently fails in both criteria in my code: initialization functions. For example in an audio application, the audio hardware/API has to be set up, audio data has to be converted to a suitable format and the object state has to properly initialized. These are clearly three different tasks and depending on the API this can easily span more than 50 lines. The thing with init-functions is that they are generally only called once, so there is no need to re-use any of the components. Would you still break them up into several smaller functions would you consider big initialization functions to be ok?

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• Any ideas for developing a Risc Processor friendly string allocator?

  - by Richard Fabian

  I'm working on some tools to enable high throughput data-oriented development, and one thing that I've not got an immediate answer for is how you go about allocating strings quickly. On risc processors you've got another problem of implementation that the CPU doesn't like branching, which is what I'm trying to minimise or avoid. Also, cache coherence is important on most CPUs, so that's gotta be influential in the design too. So, how would you go about reducing the overhead for a generic string allocator? Sometimes it's easier to solve a more explicit problem, so any ideas for string sizes of 5-30?

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• How can I "slide up" a view on android from the bottom of a screen?

  - by Jakub Arnold

  I'm trying to make a really simple slide up list view, which is displayed when a user clicks on a button at the bottom of the screen. Here's how it should look: And a complete implementation in HTML/JS http://jsbin.com/utAQOVA/1/edit I've tried to use RelativeLayout to position the list just below the button, and put that whole thing into a wrapper and then animate that up/down (same as in the JSBin above). The problem is that the bottom part which isn't visible in the beginning is somehow clipped, even if I slide it up. Evern if I initially show a portion of the list as the screenshow below shows, the bottom part gets clipped when it moves up and only the part that was initially visible is displayed. What would be a proper approach to do this kind of animation? Here's a relevant portion of the layout

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• Eclipse, Android ndk, source files, and library project dependencies

  - by Android Noob

  In Microsoft Visual Studio 2010, it is possible to create a Solution with multiple projects and set dependencies between projects. I'm trying to figure out if the same thing can be done using Eclipse via the NDK. More specifically, I want to know if it is possible to create C source files in an ordinary Android project that can reference C header files in an Android library project. For example: Android library project: Sockets Ordinary Android project: Socket_Server Sockets contains all the C header/source files that are needed to do socket I/O. Socket_Server contains test code that makes calls to the functions that are defined in Sockets library project. This test code requires a header file that contains the function declaration of all API calls. I already set the library dependencies between the projects via: Properties > Android > Library > Add

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• Receive and Process Email with ASP.NET / C# [closed]

  - by Arthur Chaparyan

  Possible Duplicates: Recommendations for a .NET component to access an email inbox coding for how to receive a mail in windows apllication What methods are there for having .NET code run and handle e-mails as they arrive? I'm developing a social networking site that will allow users to send an email to an email address that is for posting. This is the same thing Blogger does. This allows me to take a picture with my phone and send it to [email protected] and have it posted to my profile. The site is running IIS6 and I have full access to the server. Emails are currently being processed using the SMTP service that comes with Windows 2003 Server, but I can switch to another system without any issues. I am assuming I would have to somehow have the incoming emails either go into a folder that my application is watching or cause incoming emails to trigger a script. can anyone point me in the right direction?

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• What is the algorithm used by the memberwise equality test in .NET structs?

  - by Damian Powell

  What is the algorithm used by the memberwise equality test in .NET structs? I would like to know this so that I can use it as the basis for my own algorithm. I am trying to write a recursive memberwise equality test for arbitrary objects (in C#) for testing the logical equality of DTOs. This is considerably easier if the DTOs are structs (since ValueType.Equals does mostly the right thing) but that is not always appropriate. I would also like to override comparison of any IEnumerable objects (but not strings!) so that their contents are compared rather than their properties. This has proven to be harder than I would expect. Any hints will be greatly appreciated. I'll accept the answer that proves most useful or supplies a link to the most useful information. Thanks.

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• String.Format in javascript?

  - by chobo2

  Hi this is driving me nuts. I believe I asked this exact same question but I can't find it anymore(I used stackoverflow search, google search, manually searched my posts, searched my code). I wanted something that would be like the C# String.Format where you could do something like string format = String.Format("Hi {0}",name); just for javascript of course and one person gave me a simple answer it was not like a jquery plugin or anything but I think you made some json thing or something and it worked and was simple to use. I for the life of me can't find this post.

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• iPhone 4.0 Screen Resolution and writing robust code...

  - by Magic Bullet Dave

  Does anyone know what will happen with existing apps when they run on the iPhone 4.0 in terms of the new screen resolution? I am assuming, just like developing for the iPad that there should be no hard coded screen resolutions in your code. I'd also like advice on the best way of writing robust code to work well on any device. For instance, detecting the screen resolution is not enough - on the iPad the screen is physically bigger so you can display more items on it. On the new iPhone the screen is the same physical size but higher resolution, so the likely thing is that you wont want to display more items, just higher resolution versions of them. Any help would be useful, Regards Dave EDIT: I have read the other similar posts, I guess what I really would like to know is what is the recommended way to write code for all App Store devices in a robust way so they a) all work b) make best use of the device.

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• javascript table - update on data request

  - by flyingcrab

  Hi, I am trying to update a table based on a json request. The first update / draw works fine - but any subsequent changes to the variables (the start and end date) do not show up - even though the json pulled from the server seems to be correct (according to firebug). AFAIK the code below should re-initialize everything - no sure what is going on (I'm using the Google vizulization api)? function handleQueryResponse(response) { if (response.isError()) { //alert('Error in query: ' + response.getMessage() + ' ' + response.getDetailedMessage()); return; } visualization = new google.visualization.Table(document.getElementById('visualization')); visualization.draw(response.getDataTable(), null); } One more thing: I'm working on a page that displays textbased tables and currently trying to decide between the google table (viz api) and a jQuery alternative I came across jqGrid any good ones I am missing?

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• Screen scraping an application window and interacting with the mouse and keyboard

  - by ccook

  The other day I found myself addicted to a flash game and frustrated by the thing at the same time. In a moment of frustration with the game I thought I would make a 'bot' to beat it for me. Well, I really wouldn't, but it made me realize: I don't know how to interact with another application in a way to do this. Which brings me to the question, how would one take screenshots of another running application and interact with it with the keyboard and mouse. Ideally the solution would be in a managed language like c#. When doing the background reading the net was drowning with articles on scrapping HTML. There were not many articles on actually screen scrapping an application. Diverse answers are appreciated as I’m really looking at surveying what’s out there.

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• If handcoded webpage displays the same as WYSIWYG generated page, what did I gain? Can I compete wit

  - by CrazyJugglerDrummer

  My friend uses DreamWeaver to create web pages and doesn't know any HTML at all. I know HTML inside and out and can hand code from the ground up. But our web pages look similar and he can get paid for his WYSIWYG generated sites. What have I gained from learning HTML and hand-coding? Can I compete with people using DreamWeaver or other WYSIWYG editors? I know that for something like JavaScript or PHP the only way to go is to hand-code the whole thing yourself, no tools can do that for you, but is HTML in the same position?

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• yahoo doesn't accpet emails i send to it

  - by hd

  i am writing a sendmail module to email some things to my site users. for testing it i use my own email at yahoo to receive this email. but some thing woeful happend. about 1200 sent to my email address at yahoo at a moment and yahoo sent all of them to spam box. now i can't send any email to yahoo addresses and my server gives me this message in mailq: "delivery temporarily suspended: host g.mx.mail.yahoo.com[98.137.54.238] refused to talk to me..." how can i solve this problem?? many users of my site have yahoo email address. my server uses postfix. thanks for helping .

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• C++ Asymptotic Profiling

  - by Travis

  I have a performance issue where I suspect one standard C library function is taking too long and causing my entire system (suite of processes) to basically "hiccup". Sure enough if I comment out the library function call, the hiccup goes away. This prompted me to investigate what standard methods there are to prove this type of thing? What would be the best practice for testing a function to see if it causes an entire system to hang for a sec (causing other processes to be momentarily starved)? I would at least like to definitively correlate the function being called and the visible freeze. Thanks

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