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• Adding Colours (Colors) Together like Paint (Blue + Yellow = Green, etc)

  - by glenstorey

  I'm making an iOS game using cocos2d libraries. Lets say you have two objects that have two separate colours - defined in RGB as Blue: 0,0,255 Yellow: 255,255,0 I want to add blue and yellow to make green. To over complicate things, let's say that the Blue object is bigger than the Yellow object (for the sake of argument let's say that the ratio is 2:1), I'm adding twice as much blue as yellow - how to I calculate this new (light green) colour correctly. I understand LAB * Color Space is useful for this sort of 'natural colour' kind of thing, but I'm not sure how to use it - especially in the context of a cocos2d object which (AFAIK) is limited to using RGB in its colour schemes. I'd really appreciate practical help on how to implement this. Thanks heaps!

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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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• How do you store sets in Cassandra?

  - by Ben W

  I'd like to convert this JSON to a data model in Cassandra, where each of the arrays is a set with no duplicates: var data = { "data1": { "100": [1, 2, 3], "200": [3, 4] }, "data2": { "k1", [1], "k2", [4, 5] } } I'd like to query like this: data["data1"]["100"] to retrieve the sets. Anyone know how you might model this in Cassandra? (The only thing I came up with was columns whose name was a set value and the value of the column was an empty string, but that felt wrong.) It's not OK to serialize the sets as JSON or some other string, which would make this much easier. Also, I should note that it's OK to split data1 and data2 into separate ColumnFamilies, it's not necessary that they're keys in the same one.

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• Trouble with creating WPF window extended on the title area (like Office 2007/2010)

  - by Rikker Serg

  I want to make WPF window extended on the title area (like Office 2007/2010). I implemented DwmWindow (see DwmTest.zip) where I put required stuff. Commonly, it works fine except one disgusting thing: the window appears as white rectangle (see DwmIssue.png) and after a few second this rectangle disappears and the content of the window is shown (see DwmIssueCorrect.png). This bug is essential only for my window. If I remove this lines it works fine (without it aero will not showed on title): HwndSource mainWindowSrc = HwndSource.FromHwnd(handle); if (mainWindowSrc != null) mainWindowSrc.CompositionTarget.BackgroundColor = Colors.Transparent; NativeMethods.MARGINS margins = new NativeMethods.MARGINS(0, 50, 0, 0); NativeMethods.DwmExtendFrameIntoClientArea(handle, margins); How can I eliminate this white rectangle? (To run a sample DwmTest.zip WinVista/7 with DWM enabled and .NET 4.0 is required. To compile sample you will need Visual Studio 2010)

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• general things developer must know having 2+ years of exp?

  - by Salil

  Hi All, I have 2 years of experience in Ruby on Rails. I have basic knowledge (Very Basic) of mysql such as data insertion, join, select from more than one table. But now i want to know more about it cause my friends are having trouble in interview when ask questions like 1] What is the trigger. 2] which trigger call when 3] what's views in mysql? etc....... are this questions for developers?is it basic database? Also what other things developer should know having experience of 2 years or more. I am in double mind as i have over two years of exp. in ruby and i am learning new thing everyday in ruby only. if someone ask me to rate yourself i can't give more than 5 out of 10 in ROR only. So my question is What are the general things developer must know having 2+ years of exp? Regards, Salil Gaikwad

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• Using thread in aspx-page making a webrequest

  - by Mike Ribeiro

  Hi, I kind of new to the hole threading stuff so bare with me here.. I have a aspx-page that takes some input and makes a reqest: HttpWebRequest request = (HttpWebRequest)WebRequest.Create(string.Format("{0}?{1}", strPostPath, strPostData)); request.Method = "GET"; request.Timeout = 5000; // set 5 sec. timeout request.ProtocolVersion = HttpVersion.Version11; try { HttpWebResponse response = (HttpWebResponse)request.GetResponse(); /do some with response } catch (WebException exce) { //Log some stuff } The thing is that this function is used ALOT. Is there any advantage to make every request in a separate thread and exactly how would that look like? Thx!

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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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• Update Message on ASP.NET ModelPopupExtender

  - by John

  Hi, I have a form in a MS AJAX ModalPopup Extender, which is in a UpdatePanel (for async loading). Everything works as expected. There is one thing that I am trying to do but not sure how to do it. On form submission, there is server side validation on top of client side validation. My question is: what is the best way to display validation error messages if any? It would be ideal if the messages could be written to the popup asynchronously so that the popup is still there. If this is not possible, I am thinking of displaying the messages using the JavaScript alert box. Any insight and suggestions are greatly appreciated. John

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• ASP.NET ListView: how to insert "particular" item each N items ?

  - by stighy

  Hi at all, i would like to do a "weird" thing with the asp.net listview control. I would like to insert advertising each 8-10 item of the listview (databounded with a database table) : for example each 8-10 item insert the google adwords jscript code. I've googoled but i haven't found anything. Someone know if it's possible to "tell the listview: each 8 items, show this item (google jscript code). Excuse me for my poor english. Hope to be explained, thanks!

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• How can I by using the FormHelper ,or some other method, render an image link that runs javascript w

  - by chiggsy

  Background: I want to render this: <a href="javascript:myfunction('Somevar')"><img src="some.png" width="20" height="20" border="0" /></a> in a cakephp app. Note: this link is not associated with a model at all, it's just part of a form going off-site. I'm unsure of how to proceed: I've seen this on the cakephp site, but with all that goes on in cake, I'm not sure about the whole javascript calling business. What's the best way to create such a thing?

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• Excel Spreadsheet - Best way to perform an Oracle Query on a cell

  - by Jamie

  Hi there, I have an Excel Spreadsheeet. There is a cell containing a concatenated name and surname (don't ask why), for example: Cell A2 BLOGGSJOE On this cell, I would like to run the following SQL and output it to cell A3, A4 and A5 SELECT i.id, i.forename, i.surname FROM individual i WHERE UPPER(REPLACE('" & A2 & "', ' ', '')) = UPPER(REPLACE(i.surname|| i.forename, ' ', '')) AND NVL(i.ind_efface, 'N') = 'N' Any idea how I could perform an oracle query on each cell and return the result? I have enabled an oracle datasource connection in Excel, just not sure what to do now. Is this a stupid approach, and can you recommend a better more proficient way? Thanks muchly! I lack the necessary experience in this type of thing! :-) EDIT: I am aware that I could just write a simple ruby/php/python/whatever script to loop through the excel spreadsheet (or csv file), and then perform the query etc. but i thought there might be a quick way in excel itself.

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• Communicating from website to desktop application (not vice-versa)

  - by chakrit

  I am designing an application such that it will have to react to certain actions required by the website, mostly the same way Last.FM client does (if you have used one) The way Last.FM client works is that, it will register a custom protocol in Windows (lastfm://) and on their website, they use that protocol to trigger certain action on the player, e.g.: lastfm://artist//similarartists will actually direct any Last.FM client running to load up similar artists. I would like to do the same thing for my application. Is this a good idea? Is there any good alternatives to send a message from a website to a desktop client in this manner?

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• Handle Enter Key on Website (ASP and VB)

  - by Andrew

  So I have a website with multiple asp controls. When I press enter inside by login form, the search function runs because it's the first thing found on the page. How would I handle the enter button so that when the active textbox is for the login form, the loginbutton code actually runs rather than the searchbutton. One last problem is that the login controls are inside a loginview so the hierarchy shows that the asp:textbox and asp:button for logging in are inside 3 tags like so: <loginview> <login> <logintemplate> //controls are here. </logintemplate> </login> Just a note that all controls are asp and that all code is prefered in VB. Thanks

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• Resharper 5 - enable/disable on the fly

  - by Cristi Diaconescu

  I want to disable ReSharper 5 when debugging - it slows things down more than I'm willing to take. Is there an automatic way to do this? The next best thing would be a toolbar button to manually enable/disable it. On the Tools - Options - ReSharper page there's a comment that the VS command Resharper_ToggleSuspended would do just this. The problem is, I can't find the command when I right-click a toolbar - Customize... - 'Commands' tab - Choose 'Resharper' category. Am I missing something?

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• Insert fixed elements in editable iframe

  - by swarnendude

  Hi, I have an editable iframe and I want to insert two DIVs at the [b]top [/b]and [b]bottom [/b]part(as header/footer) of iframe body respectively. Now, the question is : how to insert a div [b]at the top of iframe body[/b] and fix it there? (Will insertFirst() work?) Also, how to fix the footer div always [b]at the bottom of the iframe body[/b]? I tried make its position absolute and gave a margin top/bottom, but the problem comes when the body height of the iframe increases and footer DIV position does not change. I want the same thing google docs does, i.e. fixing separate part for header/footer (though google docs page is not an iframe). Any work around? Regards, Swarnendu

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• Float over two elements

  - by eWolf

  My problem is rather complex to explain, so I'll show you an example: http://ewolf.bplaced.de/misc/float.htm I want to have a floated element (the blue box) to be be placed over two other elements (red and green) and I want the whole thing to be fixed-width and centered (done by the box with the black border) while the background of the red and green box should fill the whole width. I'm actually not quite sure if the way I've done it now is XHTML/CSS valid, but it works - at least in Firefox. In IE6, the green box expands to fit the whole blue box - how can I fix this in IE6 or find another solution to show it correctly in all browsers?

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• Making a Link Appear if a Condition is Met

  - by John

  Hello, The PHP code below echoes a link if the "loginid" of the logged-in user is on a list determined by getEditorList();. It works fairly well, but I think it might work better if I were to do it with Javascript instead. How could I accomplish the same thing with Javascript? Thanks in advance, John $editors = getEditorsList(); foreach($editors as $editor) { $editorids[] = $editor['loginid']; } if(in_array($_SESSION['loginid'], $editorids)) { echo "<div class='footervote'><a href='http://www...com/.../footervote.php'>Vote</a></div>"; } Login function: <?php if (!isLoggedIn()) { if (isset($_POST['cmdlogin'])) { if (checkLogin($_POST['username'], $_POST['password'])) { show_userbox(); } else { echo "Incorrect Login information !"; show_loginform(); } } else { show_loginform(); } } else { show_userbox(); } ?>

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• jQuery Ajax: Copy - Paste thingy

  - by tsiger

  Hi everyone, I have a form where a check an input field for its value and then i do an Ajax call using the typewatch plugin ( a small little thing which detects that the user has stopped typing after a predefined interval ). It works great. As this field is a "coupon discount" in an order form, the value could be entered by copy pasting the "coupon code" from an email or something. It also works with Ctrl+C - Ctrl+V for Copy and paste but not when a user selects the text with the mouse, clicks copy from the context menu and then paste from this menu. Is there a way in jQuery to check for this kind of behaviour in jQuery somehow?

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• How hard is it for a .NET programmer to learn Objective C and Cocoa?

  - by rsteckly

  Hi, I'm trying to build a dual platform application for a company of my own I'm trying to start at night. I have the .NET version done, but have not finished the UI part. I'm thinking of buying some 3rd party controls. If I buy these controls, however, they clearly will only work in my Windows version. I'm wondering if I should try to do the UI in GTK# and use Mono with CocoaSharp or just build the thing in MS technology and teach myself the Mac side? I'm just really unfamiliar with the Mac world and am wondering how much of a learning curve there might be. I've thought perhaps of rewriting my core logic in Ruby or Python. This why I could use the .NET version with .NET controls and presumably hook the same code up on the Mac. It's an educational app targeted at consumers. As such, it shouldn't require a lot of technical sophistication to install.

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• Poll: Require Semicolons and Forbid Tables?

  - by George Bailey

  There are a few very serious but opinionated and subjective arguments that I know of. Two of them are Whether or not to use semicolons in the event they are optional. There is a vote as here that also includes reasons Whether or not to use tables for non tabular data. There more information here Since the semicolon question arises often in JavaScript and the tables thing in HTML then there are probably many who run into both. I sort of expect a person who is strict with semicolons also to be strict about avoiding tables. I will post four CW answers here to vote on. Please vote what you think is right. If you want to talk about the reasons then please use Semicolons: Do you recommend using semicolons after every statement in JavaScript? Tables: Start your own question under the polls tag and follow the design of the semicolons question.

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• how to modify a textbox using remoting

  - by danutz0119

  I am trying to modify a textBox found in the server Form using remoting from the client side. i have tried some solutions i found, but none of them work. the remoting part works propperly, the only thing that I am not able to figure out is this: this is what i have: client side: ... private void btn_b1_Click(object sender, EventArgs e) { ... myFunc.update(string s); ... } ... sharedLibs: public interface myInterf { void update(string s); } server side: here i have 2 classes in the same namespace class class1 : MarshalByRefObject, myInterf { public void update(string s) { //what do i write here to modify textBox1? } } public partial class class2 : Form { ... // here is the textBox i am trying to alter; }

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• How can I make Access combo boxes unfurl on arrow key down?

  - by Matt Parker

  With combo box controls, I'm used to being able tab to them, click the down arrow key to open up the options, and then use the up and down arrow keys to navigate those options. In an Access form I've designed, pressing down while a combo box is active moves to the next control. I already have tab for that, so how can I get the down arrow to behave as I expect? These combo boxes are the only thing between me and a mouse-free form, which I consider essential for data entry. Thanks in advance for your help!

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• illegal charcters in facebook graph api

  - by user1465888

  i was trying to get how many facebook likes an url got, through facebook graph api. to get the likes i need to get the content from this url: http://graph.facebook.com/?id=URL for example, try to get into this url: "graph.facebook.com/?id=http://stackoverflow.com" you will see how many "shares" the url got. shares is the sum of shares and likes, so every thing was working good when i was trying to this. the problem start when i use special charcters. when i using the "?" charcter everything work okey. but when i use "&" charcter the url cuts itself. try this: "graph.facebook.com/?id=http://stackoverflow.com?p=blabla&a=fsdf" you can see in this page that the id actullay cut itself when it get to the "&" charcter and the page ends like this: { "id": "http://stackoverflow.com?p=blabla" } sorry for my bad english...

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• Remove items from SWT tables

  - by Dima

  This is more of an answer I'd like to share for the problem I was chasing for some time in RCP application using large SWT tables. The problem is the performance of SWT Table.remove(int start, int end) method. It gives really bad performance - about 50msec per 100 items on my Windows XP. But the real show stopper was on Vista and Windows 7, where deleting 100 items would take up to 5 seconds! Looking into the source code of the Table shows that there are huge amount of windowing events flying around in this call.. That brings the windowing system to its knees. The solution was to hide the damn thing during this call: table.setVisible(false); table.remove(from, to); table.setVisible(true); That does wonders - deleting 500 items on both XP & Windows7 takes ~15msec, which is just an overhead for printing out time stamps I used. nice :)

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• How I can make Recycle Bin for Database ?Application?

  - by Wael Dalloul

  Hi, I have database application, I want to allow the user to restore the deleted records from the database, like in windows we have Recycle bin for files I want to do the same thing but for database records, Assume that I have a lot of related tables that have a lot of fields. Edit: let's say that I have the following structures: Reports table RepName primary key ReportData Users table ID primary key Name UserReports table RepName primary key UserID primary key IsDeleted now if I put isdeleted field in UserReports table, the user can't add same record again if it marked as deleted, because the record is already and this will make duplication.

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