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  • 3D effect to distort paper

    - by donpal
    This may be a little hard to describe since I don't have a sample. I'm trying to find a math function or full 3d function in php or a similar language that can help me with the following effect: imagine if you were to take a flat sheet or paper and glue it on a glass of water. It wouldn't be flat any more. It would have a curve, and one of its sides might end up being slightly hidden. Anyone can refer me to a good library or resource on the web where such functions can be found?

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  • C or Ada for engineering computations?

    - by yCalleecharan
    Hi,as an engineer I currently use C to write programs dealing with numerical methods. I like C as it's very fast. I don't want to move to C++ and I have been reading a bit about Ada which has some very good sides. I believe that much of the software in big industries have been or more correctly were written in Ada. I would like to know how C compares with Ada. Is Ada fast as C? I understand that no language is perfect but I would like to know if Ada was designed for scientific computing. Thanks a lot...

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  • Tag/Keyword based recommendation

    - by Hellnar
    Hello I am wondering what algorithm would be clever to use for a tag driven e-commerce enviroment: Each item has several tags. IE: Item name: "Metallica - Black Album CD", Tags: "metallica", "black-album", "rock", "music" Each user has several tags and friends(other users) bound to them. IE: Username: "testguy", Interests: "python", "rock", "metal", "computer-science" Friends: "testguy2", "testguy3" I need to generate recommendations to such users by checking their interest tags and generating recommendations in a sophisticated way. Ideas: A Hybrid recommendation algorithm can be used as each user has friends.(mixture of collaborative + context based recommendations). Maybe using user tags, similar users (peers) can be found to generate recommendations. Maybe directly matching tags between users and items via tags. Any suggestion is welcome. Any python based library is also welcome as I will be doing this experimental engine on python language.

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  • Expression Tree : C#

    - by nettguy
    My understanding of expression tree is : Expression trees are in-memory representation of expression like arithmetic or boolean expression.The expressions are stored into the parsed tree.so we can easily transalate into any other language. Linq to SQL uses expression tree.Normally when our LINQ to SQL query compiler translates it to parsed expression trees.These are passed to Sql Server as T-SQL Statements.The Sql server executes the T-SQL query and sends down the result back.That is why when you execute LINQ to SQL you gets IQueryable<T> not IEnumetrable<T>.Because IQuerybale contains public IQueryable:IEnumerable { Type Element {get;} Expression Expression {get;} IQueryaleProvider Provider {get;} } Questions : Microsoft uses Expression trees to play with LINQ-to-Sql.What are the different ways can i use expression trees to boost my code. Apart from LINQ to SQL,Linq to amazon ,who used expression trees in their applications? Linq to Object return IEnumerable,Linq to SQL return IQueryable ,What does LINQ to XML return?

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  • How to embed a progressbar into a HTML form?

    - by Noah Brainey
    I have this code below and want it to show the progress of a form submission of a file upload. I want it to work on my website visit it through this IP (24.148.156.217). So if you saw the website I want the progress bar to be displayed when the user fills in the information and then hits the submit button. Then the progress bar displays with the time until it's finished. <style> <!-- .hide { position:absolute; visibility:hidden; } .show { position:absolute; visibility:visible; } --> </style> <SCRIPT LANGUAGE="JavaScript"> //Progress Bar script- by Todd King ([email protected]) //Modified by JavaScript Kit for NS6, ability to specify duration //Visit JavaScript Kit (http://javascriptkit.com) for script var duration=3 // Specify duration of progress bar in seconds var _progressWidth = 50; // Display width of progress bar. var _progressBar = "|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||" var _progressEnd = 5; var _progressAt = 0; // Create and display the progress dialog. // end: The number of steps to completion function ProgressCreate(end) { // Initialize state variables _progressEnd = end; _progressAt = 0; // Move layer to center of window to show if (document.all) { // Internet Explorer progress.className = 'show'; progress.style.left = (document.body.clientWidth/2) - (progress.offsetWidth/2); progress.style.top = document.body.scrollTop+(document.body.clientHeight/2) - (progress.offsetHeight/2); } else if (document.layers) { // Netscape document.progress.visibility = true; document.progress.left = (window.innerWidth/2) - 100+"px"; document.progress.top = pageYOffset+(window.innerHeight/2) - 40+"px"; } else if (document.getElementById) { // Netscape 6+ document.getElementById("progress").className = 'show'; document.getElementById("progress").style.left = (window.innerWidth/2)- 100+"px"; document.getElementById("progress").style.top = pageYOffset+(window.innerHeight/2) - 40+"px"; } ProgressUpdate(); // Initialize bar } // Hide the progress layer function ProgressDestroy() { // Move off screen to hide if (document.all) { // Internet Explorer progress.className = 'hide'; } else if (document.layers) { // Netscape document.progress.visibility = false; } else if (document.getElementById) { // Netscape 6+ document.getElementById("progress").className = 'hide'; } } // Increment the progress dialog one step function ProgressStepIt() { _progressAt++; if(_progressAt > _progressEnd) _progressAt = _progressAt % _progressEnd; ProgressUpdate(); } // Update the progress dialog with the current state function ProgressUpdate() { var n = (_progressWidth / _progressEnd) * _progressAt; if (document.all) { // Internet Explorer var bar = dialog.bar; } else if (document.layers) { // Netscape var bar = document.layers["progress"].document.forms["dialog"].bar; n = n * 0.55; // characters are larger } else if (document.getElementById){ var bar=document.getElementById("bar") } var temp = _progressBar.substring(0, n); bar.value = temp; } // Demonstrate a use of the progress dialog. function Demo() { ProgressCreate(10); window.setTimeout("Click()", 100); } function Click() { if(_progressAt >= _progressEnd) { ProgressDestroy(); return; } ProgressStepIt(); window.setTimeout("Click()", (duration-1)*1000/10); } function CallJS(jsStr) { //v2.0 return eval(jsStr) } </script> <SCRIPT LANGUAGE="JavaScript"> // Create layer for progress dialog document.write("<span id=\"progress\" class=\"hide\">"); document.write("<FORM name=dialog id=dialog>"); document.write("<TABLE border=2 bgcolor=\"#FFFFCC\">"); document.write("<TR><TD ALIGN=\"center\">"); document.write("Progress<BR>"); document.write("<input type=text name=\"bar\" id=\"bar\" size=\"" + _progressWidth/2 + "\""); if(document.all||document.getElementById) // Microsoft, NS6 document.write(" bar.style=\"color:navy;\">"); else // Netscape document.write(">"); document.write("</TD></TR>"); document.write("</TABLE>"); document.write("</FORM>"); document.write("</span>"); ProgressDestroy(); // Hides </script> <form name="form1" method="post"> <center> <input type="button" name="Demo" value="Display progress" onClick="CallJS('Demo()')"> </center> </form> <a href="javascript:CallJS('Demo()')">Text link example</a>

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  • HTML character reference display problems.

    - by Bren
    Hey folks, I'm currently developing a site in Joomla, and one of the components I'm using makes use of a PHP file to administer the language. (english.php, spanish.php) The problem I'm having is that if I use the plain text version of eg. "á", it will show up in the browser tab title ok, but as a ? in the body of the page. But if I use a character reference (&#225;), the reverse happens! Any ideas? Thanks bren

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  • PHP convert latin1 to utf8 Persian txt

    - by root
    I now work on a web-base PHP app to work with a MySQL Server database . database is with Latin1 Character set and all Persian texts don't show properly . database is used with a windows software Show and Save Persian texts good . I don't want to change the charset because windows software work with that charset . Question: how can convert latin1 to utf8 to show and utf8 to latin1 for saving from my web-base PHP app , or using Persian/Arabic language on a latin1 charset database without problem ? note: one of my texts is ???? ?????? when save from my windows-based software save as ÇÍãÏ ÑÍãÇäí and still show with ???? ?????? in my old windows-based software image : image of database , charsets,collation and windows-based software

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  • How can I show SQL Server LOGS (2005)

    - by Marcin Rybacki
    Hello, I'm trying to track the error thrown by SQL Server 2005. The problem is SQL Server reports it in my native language so it's hard for me to google it. I think that the core issue would be avialable in English in SQL Server LOGS. I'm running SQL Server Management Studio Express, going to "Management" node, and then SQL Server Logs. I can see the list of logs but I cannot enter them, the only available option in context menu is Refresh. Could you help me to show the contents of those logs?

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  • How do you go from an abstract project description to actual code?

    - by Jason
    Maybe its because I've been coding around two semesters now, but the major stumbling block that I'm having at this point is converting the professor's project description and requirements to actual code. Since I'm currently in Algorithms 101, I basically do a bottom-up process, starting with a blank whiteboard and draw out the object and method interactions, then translate that into classes and code. But now the prof has tossed interfaces and abstract classes into the mix. Intellectually, I can recognize how they work, but am stubbing my toes figuring out how to use these new tools with the current project (simulating a web server). In my professors own words, mapping the abstract description to Java code is the real trick. So what steps are best used to go from English (or whatever your language is) to computer code? How do you decide where and when to create an interface, or use an abstract class?

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  • Flags with border on hover

    - by Alpan67
    Hello I have 3 flags (Italian, german, english) with the purpose to change language for the whole site in future. How can I make a border on a hover effect that could alxo work with IE ? this is the CCS .miniflags { float:right margin : 5px 20px; padding-right:10px; } and here the HTML <div id="bandiere"> <a><img src="ita.png" class="miniflags" /></a> <a><img src="ger.png" class="miniflags" /></a> <a><img src="eng.png" class="miniflags" /></a> </div> Thanx for help Alex

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  • Xaml not WPF

    - by xan
    I am interested in using Xaml with expression blend for creating user interfaces in an application. However, because of the limitations of the target architecture, I cannot use WPF or C#. So, what I am interested in is in any examples / existing projects or advice from anyone who has experiance of this technology on the use of Xaml in it's "Pure" form as a specification language not tied to WPF. Specific questions: 1) Is it possible to use Blend + Xaml without the WPF elements, or without C# backing classes? 2) Are there any other implementations of Xaml parsers etc. which use different architectures, and can they work with blend or similar tools. 3) Are there alternative editor / designer tools which can help in this situation? I am aware of the MyXaml and MycroXaml projects, and have found a lot of resources on the web about Xaml, but 99% of it relates directly to WPF. This is fine for understanding the concepts of Xaml, but doesn't help with the implimentation I need. Many thanks!

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  • I'm starting a new project in Perl, how should I begin?

    - by Brad Gilbert
    The question is about how to start a new Perl project. How should I create the skeleton of the Project? What should the directory layout look like? How do I start testing? What build system should I use? Should I even use a build system? I have been writing Perl programs for a while now. I only started to run tests on my recent programs. I know Perl the language fairly well, now it is time to learn the way to build full blown Perl projects. I already add these to the beginning of every Perl file: use strict; use warnings; # and occasionally use autodie; I have also used Moose.

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  • Why does Excel expose an 'Evaluate' method at all?

    - by jtolle
    A few questions have come up recently involving the Application.Evaluate method callable from Excel VBA. The old XLM macro language also exposes an EVALUATE() function. Both can be quite useful. Does anyone know why the general expression evaluator is exposed, though? My own hunch is that Excel needed to give people a way to get ranges from string addresses, and to get the value of named formulas, and just opening a portal to the expression evaluator was the easiest way. But of course you don't need the ability to evaluate arbitrary expressions just to do that. Application.Evaluate seems kind of...unfinished. It isn't very well documented, and there are quite a few quirks and limitations (as described by Charles Williams here: http://www.decisionmodels.com/calcsecretsh.htm) with what is exposed. I suppose the answer could be simply "why not expose it?", but I'd be interested to know what design decisions led to this feature. Failing that, I'd be interested to hear other hunches.

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  • Scala and the Java Memory Model

    - by Ben Lings
    The Java Memory Model (since 1.5) treats final fields differently to non-final fields. In particular, provided the this reference doesn't escape during construction, writes to final fields in the constructor are guaranteed to be visible on other threads even if the object is made available to the other thread via a data race. (Writes to non-final fields aren't guaranteed to be visible, so if you improperly publish them, another thread could see them in a partially constructed state.) Is there any documentation on how/if the Scala compiler creates final (rather than non-final) backing fields for classes? I've looked through the language specification and searched the web but can't find any definitive answers. (In comparison the @scala.volatile annotation is documented to mark a field as volatile)

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  • How can I get a file's upload size using simple Javascript?

    - by Pankaj Khurana
    I have upload file functionality on one of the page. I check for the extension of the file using JavaScript. Now i want to restrict the user from uploading file greater than 1 MB. Is there any way i can check the file upload size using JavaScript. My code currently look like this: <script language="JavaScript"> function validate() { var filename = document.getElementById("txtChooseFile").value; var ext = getExt(filename); if(ext == "txt" || ext == "csv") return true; alert("Please upload Text files only."); return false; } function getExt(filename) { var dot_pos = filename.lastIndexOf("."); if(dot_pos == -1) return ""; return filename.substr(dot_pos+1).toLowerCase(); } </script>

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  • Programming a loopback-device consisting of several files in Linux

    - by dubbaluga
    Hej, it is relatively easy to use a file for emulating a block-device using losetup in Linux: http://www.walkernews.net/2007/07/01/create-linux-loopback-file-system-on-disk-file/ Can anyone please give me a hint on what to look for in case I want to program my own block-device which is based on several files I'm taking content from? For your understanding, I would like to let's say take bytes 1-500 and 1.000-3.000 from file1 and bytes 501-999 and bytes 3.001 to 5.000 from file2 to offer them as a combined block-device. My prefered programming language is Python and I want to write my program in user-space as much as possible. For Windows I found such an implementation. It's called FileDisk and HttpDisk and it can be found here: http://www.acc.umu.se/~bosse/ Thanks in advance and regards, Rainer

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  • Interview - Program on Computer

    - by Gilad Naor
    Spent some time searching, couldn't find exactly what I'm after. We like giving hands-on programming exercises as part of the interview process. The interviewee gets a laptop, with the editor and compiler of his choice. He or she then get a programming exercise and has about an hour to code it. Depending on the nature of the question, internet access is either allowed or forbidden. I'm looking for good general questions for a junior developer. I don't care what language they choose to program in. C++ is as good as Python or Scheme, as long as (s)he can program in it (this rules out "can you write a correct copy-constructor" style questions). I just want to see how they code, if their code is self-documenting, if they write tests, check edge-cases, etc. What kind of questions would you ask?

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  • Tools and ways to generate HTML help for built-in help system (QtHelp)?

    - by BastiBense
    Hello, I'm in the progress of implementing a built-in help system based on QtHelp into my application. Since QtHelp is based on Qt's help collection files, I need to produce a set of HTML pages. Since I won't be writing the documentation alone (a few of my colleagues will write, too), I am looking for the best way to produce these files. We are internally using a Wiki, and I know that the documentation should be written in some kind of markup language instead of giving all authors a WYSIWYG HTML editor. So my question is, are there tools out there which help with the process of generating documentation that can be exported as a set of HTML files, and possibly, as PDFs, too?. Thanks in advance! Update: I'm already using Doxygen for C++ documentation generation. But I'm not exactly looking for an API-Documentation generator, but something like LaTeX, which allows you to format the documentation contents like a markup document (much like a Wiki).

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  • #pragma directive and its uses in c

    - by sandy101
    Hello , can anyone tell my what does the #pragma can do in the c language . what are its uses and why the above program is not giving the output 'inside v1'& 'inside v2' in the following program ... include void v1(); void v2(); pragma startup v1 pragma exit v2 int main() { printf("inside main\n"); return 0; } void v1() { printf("inside v1\n"); } void v2() { printf("inside v2\n"); } i also want to know what a are the uses of the #pragma directive .... plz help

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  • License similar to the MIT license but without the ability to sell?

    - by Ben
    I'm trying to decide how I want to license my Wordpress themes to the public. I know that the GPL is recommended to Wordpress theme creators, however I feel it might not be liberal enough for me because I want businesses to be able to use them if they want to. I really like the MIT license, the only thing that gets me is the freedom to sell part. I don't want someone taking my themes and selling them on some theme farm site, they should be free for everyone, however I don't want to require them to republish any changes under the MIT as well, I think that that freedom should remain intact. Is there a license that sort of fits into the terms I specified here? I'm not a lawyer so I have trouble reading through the complicated language of licenses. If there is not a similar license to the MIT but with the terms I have specified, should I just license under a modified MIT? If so, can anyone help me write it? Thanks very much!

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  • How to get distinct values from a column with all its corresponding values in another column

    - by Vishnu
    I know the question is bit confusing. Please read below. I have a table table_categories (id INT(11), cname VARCHAR(25),survey_id INT(11)) I want to retrieve the values for the column cname without duplication, that is distinct values but with all the values in the other column. id cname survey_id -- -------- --------- 1 Trader 2 2 Beginner 2 25 Human 1 26 Human 2 From the above example I want to retrieve distinct cnames with all the values of the survey_id. I don't want to use any programming language. Is there any way by using a single query. Please give me a solution in MySQL.

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  • long integer problem

    - by hopefulLLl
    hello friends,, m a beginner at c language.. m using turbo c ++ compiler 16 bit. nw the max answer obtained by me is aaround 32000.. nw if i want a number larger that that then i use long int.. if i execute the following programme.. #include <stdio.h> void main() { long int x; x=40000; printf("%d", x); } then i get error that constant value is long in function main().. kindly tell me how to get an answer more that 32000 by getting rid of this error! thnx..

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  • How popular is C++ for making websites/web applications?

    - by Vilx-
    I don't know why this is question is bugging me, but time after time I come back to the though - why not make websites in C++? So far I know of none (except a rumor about Yahoo). Most use PHP, Java or ASP.NET. Some are built on Ruby or Python, but even those are minorities. At the same time, looking at StackOverflow, it seems that C++ is still a very popular language with many projects written in it. Why not for webpages? So - what do you know about this subject? Are there any websites written in C++? Are there any framewroks/libraries that help doing this? Have YOU ever done it? If yes, did you run into any fundamental problems and would you recommend this to others?

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  • What are the programming religious wars of the generations before our current generation?

    - by Christopher Altman
    Being 32 years old, I did not follow debates in programming, language design, and platforms in the 1960s, 1970s, 1980s, and most of the 1990s. I sometimes hear glimpse of what the major debates were and how they turned the course of history. It makes me wonder what I take for granted. I am curious, what were the debates. The ones I know are: Procedural vs. Object Orientated Programming Lisp vs. C Software vs. Chips with Embedded Code

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  • jquery form select (if exists in $_POST)

    - by SoulieBaby
    Hi all, I'm trying to redo this in jQuery: <script language="JavaScript" type="text/javascript"> var thisIsSelected = '<?php echo $_POST['image']; ?>'; var sel1= document.getElementById('image'); sel1.value = thisIsSelected; </script> But I seem to keep breaking it lol Basically I want jQuery to check if $_POST['image'] exists and if so make it selected on the form. I'm assuming if it's possibly with javascript, jquery can do it easier ;)

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