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• Multiple View application and Navigation Bar

  - by byronh

  Hi. I'm working in a iphone view-based application. The application works this way: First view is a welcome view with buttons for load other views. Second view is a map that shows the location using gps. Third view is a search engine that loads some information to show on the map and on a list (This has two button to load map or table). Fourth view is a table view that shows the results and then loads the detail on another view and load a web site on another view. My problem is with this view, because i don't know how can implement a navigation bar in this view that loads the detail and the web view. Thanks for your help. Byron H.

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• Minimizing Java Thread Context Switching Overhead

  - by binil

  I have a Java application running on Sun 1.6 32-bit VM/Solaris 10 (x86)/Nahelem 8-core(2 threads per core). A specific usecase in the application is to respond to some external message. In my performance test environment, when I prepare and send the response in the same thread that receives the external input, I get about 50 us advantage than when I hand off the message to a separate thread to send the response. I use a ThreadPoolExecutor with a SynchronousQueue to do the handoff. In your experience what is the acceptable delay between scheduling a task to a thread pool and it getting picked up for execution? What ideas had worked for you in the past to try improve this?

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• How is load balancing in big systems implemented?

  - by uther-lightbringer

  Hello, I'm wondering how is implemented load balancing in realy big applications like google or facebook. I know that in normal scenario there may be machine dedicated to this task, but I would like to know how is it resolved in realy big aplication with hundreds of thousans people accessing it in any given time. I am just wondering how exactly when one types google.com will that request find its way to concrete computer (are there multiple load balancers? and how is it set up and implemented that user's request will find the way to concrete balancer out of many others). I will realy appreciate if someone enlightens me this issue, thank you.

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• How to handle large table in MySQL ?

  - by Frantz Miccoli

  I've a database used to store items and properties about these items. The number of properties is extensible, thus there is a join table to store each property associated to an item value. CREATE TABLE `item_property` ( `property_id` int(11) NOT NULL, `item_id` int(11) NOT NULL, `value` double NOT NULL, PRIMARY KEY (`property_id`,`item_id`), KEY `item_id` (`item_id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci; This database has two goals : storing (which has first priority and has to be very quick, I would like to perform many inserts (hundreds) in few seconds), retrieving data (selects using item_id and property_id) (this is a second priority, it can be slower but not too much because this would ruin my usage of the DB). Currently this table hosts 1.6 billions entries and a simple count can take up to 2 minutes... Inserting isn't fast enough to be usable. I'm using Zend_Db to access my data and would really be happy if you don't suggest me to develop any php side part. Thanks for your advices !

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• Disabling Tool tip of the controls

  - by Dilse Naaz

  Hi I am using one DataGrid with templatecolumn of Asp:Label Control. In Design Page i used Tool tip for this control, But in the ItemDatabound event, it will checks the number of characters of the text of this label. If the character is less than 40, i have to disable the tooltip for that control only.. But i couldn't finalize this task. How it will be done? Please help me. Thanks in advance..

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• C# Windows Service Intermittent Method Call

  - by Goober

  Scenario I have a C# Windows Service that essentially subscribes to some events and if anything is triggered by the events, it carries out a few tasks. The Thing... ....is that these events are monitoring processes, which I need to restart at certain times of the day. Question What's the best way I can go about performing this task at an exact time? Thoughts so far are: 1)To use a timer that checks what time it is every few minutes. 2)Something that isn't a timer and doesn't suck as an implementation. Help greatly appreciated.

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• Possible to sort via two time stamps and display same row twice.

  - by jamiethompson90

  I'm looking at creating a time table solution. I have a task sheet that looks like Area 1 item 1 startTime endTime Area 1 item1 startTime endTime I wish to create a display where I can view what even is happening next, either endTime or startTime i.e. Newcastle reel 16:45 18:45 Newcastle reel2 17:45 19:45 would output Newcastle reel 16:45 Newcastle reel 17:45 Newcastle reel 18:45 Newcastle reel 19:45 More so, I would like to detect if the time is a startTime or an endTime would I have to enter two rows for each activity (time,area,item, start|end). I can make the interface to the creation of two rows. I just wondered if there was a better solution. Any input is appreciated, Thanks, Jamie

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• Problem with running a program from flashdrive

  - by rajivpradeep

  I have a USB drive with two partitions in it, one hidden and one normal. I have an application which swaps the memory and runs the flash application in hidden zone. The problem is that the application works fine on Windows 7 and when run on Win XP, it swaps the partitions but doesn't run the flash applications but just keeps running in the background. I can see it in task manager. But, when I copy the application to desktop and run, it runs with no glitch. I was facing the same problem on Win 7 too, but it was running as required when I ran it using "Run in XP mode" and then I applied a SHIM and is running since then as required. The application is built using VC++ 2008. does anyone know the solution?

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• Can I improve performance by refactoring SQL commands into classes?

  - by Matthew Jones

  Currently, my entire website does updating from SQL parameterized queries. It works, we've had no problems with it, but it can occasionally be very slow. I was wondering if it makes sense to refactor some of these SQL commands into classes so that we would not have to hit the database so often. I understand hitting the database is generally the slowest part of any web application For example, say we have a class structure like this: Project (comprised of) Tasks (comprised of) Assignments Where Project, Task, and Assignment are classes. At certain points in the site you are only working on one project at a time, and so creating a Project class and passing it among pages (using Session, Profile, something else) might make sense. I imagine this class would have a Save() method to save value changes. Does it make sense to invest the time into doing this? Under what conditions might it be worth it?

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• Is my code really not unit-testable?

  - by John

  A lot of code in a current project is directly related to displaying things using a 3rd-party 3D rendering engine. As such, it's easy to say "this is a special case, you can't unit test it". But I wonder if this is a valid excuse... it's easy to think "I am special" but rarely actually the case. Are there types of code which are genuinely not suited for unit-testing? By suitable, I mean "without it taking longer to figure out how to write the test than is worth the effort"... dealing with a ton of 3D math/rendering it could take a lot of work to prove the output of a function is correct compared with just looking at the rendered graphics.

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• Rails 2.3.5 table populated by fixtures at end of test run rather than at start

  - by rlandster

  I start with a test database containing the schema but with no data in the tables. I run a test like so cd test/ ruby unit/directive_test.rb I get failures indicating that the code found no data in the data tables. However, I look at the tables after running that test and the data is now in the the table. In fact, if I immediately run the test again I get no failures. So it appears that the fixture is being loaded into the table too late for one of my modules to find it. When are the fixtures loaded? After or before the app/model/*.rb files are executed? If it is after the models are executed is there a way to delay the loading? This issue is also relevant when running rake test:units since that task clears the test data after it finished.

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• Conceptually, how does replay work in a game?

  - by SnOrfus

  I was kind of curious as to how replay might be implemented in a game. Initially, I thought that there would be just a command list of every player/ai action that was taken in the game, and it then 're-plays' the game and lets the engine render as usual. However, I have looked at replays in FPS/RTS games, and upon careful inspection even things like the particles and graphical/audible glitches are consistent (and those glitches are generally *in*consistent). So How does this happen. In fixed camera angle games I though it might just write every frame of the whole scene to a stream that gets stored and then just replays the stream back, but that doesn't seem like enough for games that allow you to pause and move the camera around. You'd have to store the locations of everything in the scene at all points in time (No?). So for things like particles, that's a lot of data to push which seems like a significant draw on the game's performance whilst playing.

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• Simple modal div in jQuery?

  - by jasondavis

  I have tried almost all of the jQuery Modal plkugins I can find on the net but they are all much to bulky for what I need. I dont need all the fancy features, I want to be able to open a div and have the background of the page go transparent grey like the photo below and have my div be on top of it, that is all I need to do so I would like to write some jquery to do this instead of using a bulky plugin. Does anyone have any small code that can do this task? Is the transparent background an image or just css?

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• MySQL IDE recommendation?

  - by Maxim Veksler

  Hello, I've been wondering what you guys are using to write,debug,test your SQL queries there days? The requirements are quite simple: Auto-complete Syntax Highlighting SQL Hisotry Good UI There are some tools which are common for this task, each with his own problems. To name a few Mysql Query Browser MySQL Workbench (GA?, Beta?) Eclipse Database development perspective Oracle SQL Developer with Connector/J I won't go into why none of them is perfect, trust me they all have their problems. So, what are you guys using?

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• Android 4.0.3 OpengL ES 2.0 issue

  - by user1662184

  i develop live wallpapers using Opengl ES 2.0 engine. My wallapapers run smooth on 2.x Android Devices , but in 4.03 i see some strange things. 1st seconds (maybe a minute max) lwp runs smooth , but after that starts dropping frames especially when objects passing near camera allmost crashes. But no error on eclipse Log. I watched Eclipse log from the begining of loading the lwp to the point of dropping frames. I ve seen that on My LG optimus 2X , and my Samsung Galaxy S2. Any Idea what to check , or what is going on?? UPDATE i just noticed that changing render mode from dirty to continuously fixed the problem , but until screen orientation changes , or goes of and on. after that renderer freaks out.

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• Application.Idle causes high CPU usage

  - by Neal

  Hello, I use the Application.Idle event to handle toolbar status (enable/disable) etc. quite extensively. As I'm beta testing Norton AntiVirus 2011, it brought to my attention that my app that I'm developing triggered a high CPU usage warning on at least one CPU. Sure enough, I opened the task manager and watched one of the four CPU's (quad core system) go to near 100%. I thought Application.Idle was the way to handle things when the application wasn't performing CPU tasks. Why is Application.Idle spiking the CPU? Here is how I attach to the event: AddHandler Application.Idle, AddressOf OnAppIdle Been using Application.Idle for a long time, never knew it would have this issue. Using VS 2010 .NET 4 Thank you.

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• .Net/C# Build Tool - Is NAnt a preferred tool?

  - by Olle

  I'm about to set up an automatic build of a .net/C# project. I've searched the net quite a bit, and there are a lot of references to this tool called 'NAnt'. My questions are: Is NAnt considered a good tool for this, is it still used? Are there other toos that are the de facto standard for such a task? From the information on the projects's sourceforge page, it doesn't seem to have been much development going on the lates years. The same applies to the NAntContrib project. Thanks!

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• Replacing a column in CSV file with another in bash

  - by user2525881

  I have a csv file with a number of columns. I am trying to replace the second column with the second to last column from the same file. For example, if I have a file, sample.csv 1,2,3,4,5,6 a,b,c,d,e,f g,h,i,j,k,l I want to output: 1,5,3,4,5,6 a,e,c,d,e,f g,k,i,j,k,l Can anyone help me with this task? Also note that I will be discarding the last two columns afterwards with the cut function so I am open to separating the csv file to begin with so that I can replace the column in one csv file with another column from another csv file. Whichever is easier to implement. Thanks in advance for any help.

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• Upload and preview image in client side without posting back

  - by Ahmy

  I need to upload an image and then preview it without posting back as i need to have a file upload control(even HTMLinputfile or ASPfileupload) then the user will browse to select image after selecting (browsing) there will a button(HTMLInputButton) that will save the uploaded image and preview it. I have the following code : <div> <input id="UploadInput" type="file" value="Upload" /> <br /> <input id="PreviewBtnInput" type="button" value="Preview" onclick="ShowPreview()" /> <br /> <img id="ImgUploaded" /> </div> So how can i do this task ? Thanks in advance for any reply but please if any one has a link for article that talk about this issue please i need a clear code not article details.

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• Making invisible table rows visible one by one

  - by Roland

  I have the following situation I have a couple of table rows within a table eg <tr><td>One</td></tr> <tr><td>Two</td></tr> <tr><td>Three</td></tr> <tr><td>Four</td></tr> <tr><td>Five</td></tr> Say all of them are invisible Then I have a button to make them visible one by one, so if row 1 is invisible and I press the button then row 1 should be visible, if I press it again it sees that row 1 is already visible then it makes row 2 visible and so it goes on and on and on. How can I do this in Jquery so that jquery can accomplish this task for me. Is it possible?

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• How to correctly handle click events on Widget

  - by www.liveinternet.ruusersilya_bog

  There is a task to make smt like todo list on widget (with dinamic number of elements), how to organize this list for click support on this elements. I only found how add click event on one widget layout element (with setOnClickPendingIntent), and how send text to widget element TextView. But it's unclear how handle click events for sub-elemets, or how get click coordinates(or item) where was click event. I saw widget "Agenda widget" - and it work fine with clicking on different calendar rows. I will be very much appreciated for help.

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• How to retain focus on an editable html after deleting an element.

  - by Lukasz

  Hello, I have a website with design mode on (aka. content editable = true) with some basic text on it. To that site I hooked up a shortcut so that at any point in the text I can insert an input box that serves me as an autocomplete. For that input however I want it to disappear right after I hit ENTER so that I can continue typing. It is an easy task to just make the input box disappear but I always loose focus from my document. I would greatly appreciate any suggestions on how to make this work?

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• Can I improve performance by refactoring SQL commands into C# classes?

  - by Matthew Jones

  Currently, my entire website does updating from SQL parameterized queries. It works, we've had no problems with it, but it can occasionally be very slow. I was wondering if it makes sense to refactor some of these SQL commands into classes so that we would not have to hit the database so often. I understand hitting the database is generally the slowest part of any web application For example, say we have a class structure like this: Project (comprised of) Tasks (comprised of) Assignments Where Project, Task, and Assignment are classes. At certain points in the site you are only working on one project at a time, and so creating a Project class and passing it among pages (using Session, Profile, something else) might make sense. I imagine this class would have a Save() method to save value changes. Does it make sense to invest the time into doing this? Under what conditions might it be worth it?

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• NLP Library in java

  - by user337962

  hi, I need a simple Natural Language Processing library written in java which can be used to process a search query/question. What I want actually is to separate the main subject which is being searched in a query. For an example, considering a query like "What is an apple?", it's perfect if the main search word apple can be extracted. This is for a semantic search engine development purpose. Can anyone please suggest a suitable nlp library for this?? Thank You!!

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• drupal hook just before inserting/updating user info

  - by Senthil

  Hi, I want to hook into drupal's user registration and be able to stop it or allow it to proceed just before database insert. All validations and 3rd party stuff must be done and just before inserting I need to hook in. What is the hook and the operation to do this? I tried 'validate' operation in the hook_user. But, after I check against my logic and let the registration proceed, it should not fail due to some other validation. If I let it proceed, no application logic after that should stop the registration (unless the DB engine fails or something of course). If I stop it, I will set a form error so that nothing happens. How can this be accomplished? P.S. I am using Drupal 6.16

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