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  • Strict doctype - form and input element

    - by David
    Does anyone know the reasoning behind the strict doctype not allowing input elements to be direct descendents of a form element. I find it annoying that i have to wrap a submit button which is a block level element inside another block level element say a fieldset or a div. However, I cannot find an answer anywhere as to why this actually is.

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  • What's the performance penalty of using isKindOfClass in Objective C?

    - by durcicko
    I'm considering introducing: if ([myInstance isKindOfClass:[SomeClass class]]) { do something...} into a piece of code that gets called pretty often. Will I introduce a significant performance penalty? In Objective C, is there a quicker way of assessing whether a given object instance is of certain class type? For example, is the following quicker? (I realize the test is somewhat different) if (myInstance.class == [SomeClass class]) { do something else...}

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  • How to get debugging of an App Engine application working?

    - by Chris Lacy
    I've got 10+ years in C/C++, and it appears Visual Studio has spoilt me during that time. In Visual Studio, debbuging issimple: I just add a breakpoint to a line of code, and as soon as that code is executed, my breakpoint triggers, at which point I can view a callstack, local/member variables, etc. I'm trying to achieve this functionality under App Engine. I assume that is possible? All the searching I've done to this point has led me to using Pydev in Eclipse. As best I can tell, I am successfully launching my simple 'hello world' program in Debug mode. But the IDE doesn't even seem to have an option to set a breakpoint? I must be missing something. I've googled long and hard about this, but am having no luck. Most results trace back to the same old threads that don't deal directly with my issue. Can anyone shed some light on how you get basic debugging setup using Pydev/Eclipse with App Engine? Alternatively, if there's an easier way to debug App Engine than using Pydev/Eclipse, I'd love to hear about it. Thanks in advance.

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  • How to setup OpenGL camera for a racing game

    - by vian
    I need the view to show the road polygon (a rectangle 3.f * 100.f) with a vanishing point for a road being at 3/4 height of the viewport and the nearest road edge as a viewport's bottom side. See Crazy Taxi game for an example of what I wish to do. I'm using iPhone SDK 3.1.2 default OpenGL ES project template. I setup the projection matrix as follows: glMatrixMode(GL_PROJECTION); glLoadIdentity(); glFrustumf(-2.25f, 2.25f, -1.5f, 1.5f, 0.1f, 1000.0f); Then I use glRotatef to adjust for landscape mode and setup camera. glMatrixMode(GL_MODELVIEW); glLoadIdentity(); glRotatef(-90, 0.0f, 0.0f, 1.0f); const float cameraAngle = 45.0f * M_PI / 180.0f; gluLookAt(0.0f, 2.0f, 0.0f, 0.0f, 0.0f, 100.0f, 0.0f, cos(cameraAngle), sin(cameraAngle)); My road polygon triangle strip is like this: static const GLfloat roadVertices[] = { -1.5f, 0.0f, 0.0f, 1.5f, 0.0f, 0.0f, -1.5f, 0.0f, 100.0f, 1.5f, 0.0f, 100.0f, }; And I can't seem to find the right parameters for gluLookAt. My vanishing point is always at the center of the screen.

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  • Php/Mysql Simple survey

    - by creativz
    I want to make a little php poll. The script should ask the users a question they can only answer by numbers from 0-999. After pressing the submit button the data should be stored into mysql. So I just want to know how much users choosed the same number (in percent). It's a simple poll but I don't want any output to be shown.

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  • What is the basic pattern for using (N)Hibernate?

    - by Vilx-
    I'm creating a simple Windows Forms application with NHibernate and I'm a bit confused about how I'm supposed to use it. To quote the manual: ISession (NHibernate.ISession) A single-threaded, short-lived object representing a conversation between the application and the persistent store. Wraps an ADO.NET connection. Factory for ITransaction. Holds a mandatory (first-level) cache of persistent objects, used when navigating the object graph or looking up objects by identifier. Now, suppose I have the following scenario: I have a simple classifier which is a MSSQL table with two columns - ID (auto_increment) and Name (nvarchar). To edit this classifier I create a form which contains a single gridview and two buttons - OK and Cancel. The user can nearly directly edit the table in the gridview, and when he hits OK the changes he made are persisted to the DB (or if he hits cancel, nothing happens). Now, I have several questions about how to organize this: What should the lifetime of my ISession be? Should I create a single ISession for my whole application; an ISession for each of my forms (the application is single-threaded MDI); or an ISession for every DB operation/transaction? Does NHibernate offer some kind of built-in dirty tracking or must I do this myself? The manual mentions something like it here and there but does not go into details. How is this done? Is there not a huge overhead? Is it somehow tied with the cache(s) that NHibernate has? What are these caches for? Are they not specific to a single ISession? That is, if I use a seperate ISession for every transaction, won't it break the dirty tracking? How does the built-in dirty tracking detect deleted objects?

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  • Speed vs security vs compatibility over methods to do string concatenation in Python

    - by Cawas
    Similar questions have been brought (good speed comparison there) on this same subject. Hopefully this question is different and updated to Python 2.6 and 3.0. So far I believe the faster and most compatible method (among different Python versions) is the plain simple + sign: text = "whatever" + " you " + SAY But I keep hearing and reading it's not secure and / or advisable. I'm not even sure how many methods are there to manipulate strings! I could count only about 4: There's interpolation and all its sub-options such as % and format and then there's the simple ones, join and +. Finally, the new approach to string formatting, which is with format, is certainly not good for backwards compatibility at same time making % not good for forward compatibility. But should it be used for every string manipulation, including every concatenation, whenever we restrict ourselves to 3.x only? Well, maybe this is more of a wiki than a question, but I do wish to have an answer on which is the proper usage of each string manipulation method. And which one could be generally used with each focus in mind (best all around for compatibility, for speed and for security). Thanks.

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  • Simple way to embed an MP3 audio file in a (static) HTML file, starting to play at a specifc time?

    - by Marcel
    Hi all, I want to produce a simple, static HTML file, that has one or more embedded MP3 files in it. The idea is to have a simple mean of listening to specific parts of an mp3 file. On a single click on a visual element, the sound should start to play; However, not from the beginning of the file, but from a specified starting point in that file (and play to the end of the file). This should work all locally from the client's local filesystem, the HTML file and the MP3 files do not reside on a webserver. So, how to play the MP3 audio from a specific starting point? The solution I am looking for should be as simple as possible, while working on most browsers, including IE, Firefox and Safari. Note: I know the <embed> tag as described here, but this seems not to work with my target browsers. Also I have read about jPlayer and other Java-Script-based players, but since I have never coded some JavaScript, I would prefer a HTML-only solution, if possible.

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  • iPhone SDK reload UIView's content

    - by Matt S.
    I have two views, one view takes the whole screen, the second view covers only a little portion. What I want is for that second view to be on the first view (which I already have done), but the problem is, when I set values (in this case UILabel's) the label on the screen doesn't display that new value. I know for a fact the method gets called, but for some reason it won't change the label's value.

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  • Internet Explorer and onMouseOver/onMouseOut

    - by Thorbjørn Reimann-Andersen
    Hi all, I have tried looking a similar question on here but couldnt find one so here it comes: I have this html (ignore the "+whatever+@", its in a codebehind file so im putting some variables that im getting from there): <div id='ReferenceContainer"+UniqueID+@"' style='background-color:"+BackcolourOFF+@"; width:"+CompWidth+@"; height:"+CompHeight+@";'> <div id='Reference"+UniqueID+@"' style='width:"+CompWidth+@"; height:"+CompHeight+@"; '> <div id='RefTextContainer"+UniqueID+@"' style='float:left; width:"+CompWidth+@"; height:"+CompHeight+@"; ' > <div id='RefTitleCon' style='margin-top:"+RefTitleMargin+@"px; color:"+RefTitleColor+@"; z-index:-1;' ><p><b>"+RefTitle+@"</b></p> </div> <div id='RefTextCon'><p>"+RefText+@"</p></div> </div> <div id='RefPicContainer"+UniqueID+@"' style='float:right;'> <img id='RefImg"+UniqueID+@"first' class='first' name='RefImg"+UniqueID+@"' src=" + StartImg + @" style='position:absolute;' ></img> <img id='RefImg"+UniqueID+@"second' class='second' name='RefImg"+UniqueID+@"' src=" + AltImg + @" style='display:none;' ></img> </div> </div> <div id='ScriptContainer"+UniqueID+@"' style='width:"+CompWidth+@"; height:"+CompHeight+@"; position:relative; top:-"+CompHeight+@"px; left:0px;' onMouseOver='ChangeBackcolourON"+UniqueID+@"()' onMouseOut='ChangeBackcolourOFF"+UniqueID+@"()'></div> </div> Now in firefox, everything works just perfect. The div "ScriptContainer" sits in front of the whole thing and when the mouse enters or leaves the functions work exactly as they should. But IE8 places the text in front of everything and then the functions do not work as i would like them to. "ChangeBackcolourOFF" gets called every time the mouse enters the text, which sits in front of everything and "ChangeBackcolourON" gets called every time the mouse enters the "Scriptcontainer" from the text. So i either need to figure out how to force the text to be placed behind the "Scriptcontainer" or some other solutions. I appreciate you answers

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  • Django: Implementing a referral program

    - by Hellnar
    Hello, I have an ecommerce website that works in a classical way: people sign up, buy a product with their CC. It uses the default Django auth system for users and registration and session framework. Now I want to implement a referral system to my system where people can invite other people by giving their referral link (ie mysite.com/referral/123123/ ) and if a person signs up AND buys an item, the inviter gets 5$. How can this the implemented ?

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  • MySQL efficiency as it relates to the database/table size

    - by mlissner
    I'm building a system using django, Sphinx and MySQL that's very quickly becoming quite large. The database currently has about 2000 rows, and I've written a program that's going to populate it with another 40,000 rows in a couple days. Since the database is live right now, and since I've never had a database with this much information in it, I'm worried about some things: Is adding all these rows going to seriously degrade the efficiency of my django app? Will I need to go back through it and optimize all my database calls so they're doing things more cleverly? Or will this make the database slow all around to the extent that I can't do anything about it at all? If you scoff at my 40k rows, then, my next question is, at what point SHOULD I be concerned? I will likely be adding another couple hundred thousand soon, so I worry, and I fret. How is sphinx going to feel about all this? Is it going to freak out when it realizes it has to index all this data? Or will it be fine? Is this normal for it? If it is, at what point should I be concerned that it's too much data for Sphinx? Thanks for any thoughts.

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  • Quote POSIX shell special characters in Python output

    - by ??O?????
    There are times that I automagically create small shell scripts from Python, and I want to make sure that the filename arguments do not contain non-escaped special characters. I've rolled my own solution, that I will provide as an answer, but I am almost certain I've seen such a function lost somewhere in the standard library. By “lost” I mean I didn't find it in an obvious module like shlex, cmd or subprocess. Do you know of such a function in the stdlib?

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  • Can a standalone ruby script (windows and mac) reload and restart itself?

    - by user30997
    I have a master-workers architecture where the number of workers is growing on a weekly basis. I can no longer be expected to ssh or remote console into each machine to kill the worker, do a source control sync, and restart. I would like to be able to have the master place a message out on the network that tells each machine to sync and restart. That's where I hit a roadblock. If I were using any sane platform, I could just do: exec('ruby', __FILE__) ...and be done. However, I did the following test: p Process.pid sleep 1 exec('ruby', __FILE__) ...and on Windows, I get one ruby instance for each call to exec. None of them die until I hit ^C on the window in question. On every platform I tried this on, it is executing the new version of the file each time, which I have verified this by making simple edits to the test script while the test marched along. The reason I'm printing the pid is to double-check the behavior I'm seeing. On windows, I am getting a different pid with each execution - which I would expect, considering that I am seeing a new process in the task manager for each run. The mac is behaving correctly: the pid is the same for every system call and I have verified with dtrace that each run is trigging a call to the execve syscall. So, in short, is there a way to get a windows ruby script to restart its execution so it will be running any code - including itself - that has changed during its execution? Please note that this is not a rails application, though it does use activerecord.

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  • Mysql storing quotes as &#39;

    - by Click Upvote
    I have some PHP code which stores whatever is typed in a textbox in the databse. If I type in bob's apples, it gets stored in the database as bob&#39;s apples. What can be the problem? The table storing this has the collation of latin1_swedish_ci.

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  • how to displaying pivot in matrix reporting service?

    - by Chandradyani
    Dear All, I have problem relating to pivot query and matrix reporting. I don't know how to display it on matrix reporting service so it will dynamic column. Can any body help me to show how to configure the matrix table? or could you give the link where can I find the answer of my problem? I'm newbie in reporting service.

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  • Which View Engine are you using with ASP.NET MVC?, and Why?

    - by Sosh
    Hi, I'm thinking of experimenting with alternative View Engines for ASP.NET MVC, and would like to know what other people are using. Please let me know 1) Which View Engine you use, and 2) Why. The standard 'web-forms' view engine is of course a valid answer, but please say so only if you have decided to use it for a reason, not just 'Becuase I can't be bothered to change it' ;) Thank you!

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  • XML Node replacement in Actionscript 3

    - by Andreas
    Hi, A couple of days ago I asked a question about how to replace and edit values in an xml file with c#. The question got a great answer. Now I wonder how to do this in Actionscript and if there is an as simple way as in c#. The question can be found here: http://stackoverflow.com/questions/2856459/advanced-replace-in-c Thanks

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  • Force import module from Python standard library instead of PYTHONPATH default

    - by jrdioko
    I have a custom module in one of the directories in my PYTHONPATH with the same name as one of the standard library modules, so that when I import module_name, that module gets loaded. If I want to use the original standard library module, is there any way to force Python to import from the standard library rather than from the PYTHONPATH directory, short of renaming the custom module and changing every reference to point to the new name?

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  • How to split a git repository while preserving subdirectories?

    - by Thomas
    What I want is similar to this question. However, I want the directory that is split into a separate repo to remain a subdirectory in that repo: I have this: foo/ .git/ bar/ baz/ qux/ And I want: foo/ .git/ bar/ baz/ quux/ .git/ qux/ # Note: still a subdirectory How to do this in git? I could use the method from this answer if there is some way to move all the new repo's contents into a subdirectory, throughout history.

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  • Read Response.write in another Page

    - by Sri Kumar
    Hello All, I have a page www.senderdomain.com/sender.aspx, from which i need to write a string to another page in other domain www.receiverdomain.com/receiver.aspx In sender.aspx i have written Response.Write("Hello"); Response.Redirect(Request.UrlReferrer.ToString()); It gets redirected to respective receiver.aspx page, but I am not sure how to get the text "Hello" in receiver.aspx page. Can any pl help on this?

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