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• split double in c wihout any libary

  - by DoomStone

  Hello I have a question for a c programmer out there, we have a tast at school to create a soft real time system in an operation system made by our teacher. Well that is all fine and dandy, we have chosen to create a system that calcuate how many unites of medicine a diabetic need based on his or hers blood sugar. It does not need to be correct just that we have the idea of a real time system :D But we have hit a little snag our formula for calculating the units of medicine is [blood sugar] * 1.2 But the only way we can send messages between processes is via a structure that contains 8 longs, but here is where my knowledge of c ends, we need for some way to split this double into 2 longs, example: the whole number in long 0 and the decimals in long 1 and then assemble it on the other side. But I have no idea who to do this, and therefore need a little help. We have tried but we do not have access to c standard libraries

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• How to build Object Oriented Skills?

  - by cedar715

  Being a core developer for couple of years, coding applications seeing the class diagrams, sequence diagrams, I decided to improve my self, taking the next step of designing. As I'm an OO developer, I'm interested in improving my design skills. For Example, I had a hard time designing a currency converter. My questions to the SO: Is it by experience the design skills can be acquired? Will learning books/blog/material over internet etc help? Is it that one needs the domain knowledge of the application being developed? Knowing Design patterns, principles? Studying 'Code Complete' book ? Need to have Problem-solving skills? In short, given a problem, I just want to solve it in Object-oriented way??

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• What is a good programming language for testers who are not great programmers?

  - by Brian T Hannan

  We would like to create some simple automated tests that will be created and maintained by testers. Right now we have a tester who can code in any language, but in the future we might want any tester with a limited knowledge of programming to be able to add or modify the tests. What is a good programming language for testers who are not great programmers, or programmers at all? Someone suggested LUA, but I looked into LUA and it might be more complicated that another language would be. Preferably, the language will be interpreted and not be compiled. Let me know what you think.

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• Learning about version control systems, Git, SVN

  - by anijhaw

  I am a basic SVN user now trying to learn GIT for a new position. I am trying the usual reading docs and watching videos. However after doing all that I still feel that there is a lot that I do not know. I was wondering if there is a place like project Euler for programming languages, that provides a series of exercises that you can do just to increase your confidence and test your knowledge about a version control system. Something thats generic enough and gets you up to speed with how to do basic things. This could also serve as a comparison point of sorts between multiple VCSs, that would show what things are easy in which VCS. If there is nothing I was planning to document my journey in learning GIT and the create an exercise of this sort.

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• How to use a dynamic smarty variable in foreach loop

  - by P Kumar

  Hi, Can anyone tell me how to use dynamic variables in smarty foreach loop. I am trying to create a module in prestashop and m very close to get it done. here's my code: //file name index.php foreach($subCategories as $s) { $foo = intval($s['id_category']); $k = new Category($foo); $var1 = "subSubCategories.$foo"; $var1 = $k-getSubCategories(1); $smarty-assign(array('foo'.$foo = $var1)); } //file name:index.tpl {assign var=foo value=$foo$cat} //where $cat is a variable that counts the number of categories {if isset($foo) AND $foo} {foreach from=$foo item=subCategories name=homesubCategories} <p>{$subCategories.name}</p> {/foreach} {else} <p>{l s='test failed'}</p> {/if} I've exhausted all of my resources and knowledge and feeling quite helpless at this moment. so plz help me out.

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• Failed to convert parameter value from a Guid to a String

  - by user320460

  Hello, I am at the end of my knowledge and googled for the answer too but no luck :/ Week ago everything worked well. I did a revert on the repository, recreated the tableadapter etc... nothing helped. When I try to save in my application I get an SystemInvalidCastException at this point: PersonListDataSet.cs: partial class P_GroupTableAdapter { public int Update(PersonListDataSet.P_GroupDataTable dataTable, string userId) { this.Adapter.InsertCommand.Parameters["@userId"].Value = userId; this.Adapter.DeleteCommand.Parameters["@userId"].Value = userId; this.Adapter.UpdateCommand.Parameters["@userId"].Value = userId; return this.Update(dataTable); **<-- Exception occurs here** } } Everything is stuck here because a Guid - and I checked the datatable preview with the magnifier tool its really a true Guid in the column of the datatable - can not be converted to a string ??? How can that happen?

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• Discovered: Run A Video In An Image

  - by Moon .

  okay i have found the way to run a video in a image.... the procedure as given below 1 - Run a video in Windows Media Player 2 - While the video running, Press Print Screen 3 - Paste it in MS Paint 4 - Save the image in JPEG or BMP format 5 - Run any video in Windows Media Player again 6 - Now open that image, in Windows Page\Fax Viewer or ACDsee etc. 7 - at this time the win. media player is playing and the image is open 8- Switch to image (focus on image) and you will see the currently running video in the image can anybody with extensive knowledge of windows tell me why does this happen. Well this doesn't work in all versions of windows and media players. i tried this on the follwing setup Windows Media Player 10 Windows XP 2006 SP2

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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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• How is the ">" operator implemented (on 32 bit integers)?

  - by Ron Klein

  Let's say that the environment is x86. How do compilers compile the "" operator on 32 bit integers. Logically, I mean. Without any knowledge of Assembly. Let's say that the high level language code is: int32 x, y; x = 123; y = 456; bool z; z = x > y; What does the compiler do for evaluating the expression x > y? Does it perform something like (assuming that x and y are positive integers): w = sign_of(x - y); if (w == 0) // expression is 'false' else if (w == 1) // expression is 'true' else // expression is 'false' Is there any reference for such information?

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• Help System.Web.Compilation.BuildManager find a type in a non-referenced assembly

  - by asbjornu

  I'm trying to write a plug-in system where assemblies can be dropped in a folder that ASP.NET has no knowledge about. This plug-in system works fine for ASP.NET MVC based assemblies, but for old-school WebForm assemblies (where the .aspx files Inherits the System.Web.UI.Page derived classes) System.Web.Compilation.BuildManager is responsible for compiling the .aspx file into a dynamic assembly. My problem is that the BuildManager knows nothing about the assemblies within my plug-in folder and it seems to be absolutely nothing I can do to help it. If I do: BuildManager.GetType("Type.Defined.In.Plugin.Assembly", true, true) it throws. If I first get a reference to the Type and then try: var instance = BuildManager.CreateInstanceFromVirtualPath(path, type); it still throws, even though I've now passed in the specific type it needs to compile the .aspx file. Is there anything I can do to help BuildManager find the types it needs to compile the .aspx file?

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• if you have written programming book, what prompted you?

  - by aaa

  I noticed that quite a few authors visit the website. First of all, thank everybody who shared their knowledge. Now the question, what prompted you to write a book? was it desire to educate people, just wanted to write the book, financial gains, something else? was writing a book your idea or you were approached to write the book? were you happy with your final work, after editors have their say what feedback did you receive, positive negative neutral? I am warned this is maybe subjective question, I rest decision to close with moderators.

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• building a website

  - by Ant

  Not sure if this is the right place to post this, or if it should be under programmers.stackexchange... Anywho, a couple of my friends run a business and they asked me to build them a public website. It will only be used for information about the company with soe pictures. No transactions will be involved. Right now I work for a company where I build internal websites, and do alot of backend programming in C#. I understand html, css, jquery, etc. so I feel like I am completely capable of building a website for them. However, I do not know all the basic knowledge to building one. For example, where should we host the files, what type of security issues do I need to be aware of, what's the best software to use for developing websites (I use visual studio at work), where can I find some design techniques, etc. Any help is appreciated.

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• Developing browser plug-ins?

  - by JavaMan

  I have a project that I'd like to try that involves developing an internet browser plug-in. I have knowledge in Java and DHTML, but nothing in the world of browser plug-in development. I thought I would just ask here then what is the most efficient way to develop a browser plug-in? If possible, I'd like to streamline the process so that getting the plug-in to work in different browsers involves as little work as possible. Can this be done? I'm not asking for a tutorial like the trolls do, just a few pointers that's all. I don't waste mine or anyone else's time.

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• Any book that covers internals of recent versions of Unix OS

  - by claws

  This summer I'm getting into UNIX (mostly *BSD) development. I've graduate level knowledge about operating systems. I can also understand the code & read from here and there but the thing is I want to make most of my time. Reading books are best for this. From my search I found that these two books The Design and Implementation of the 4.4 BSD Operating System (1996) "Unix Internals: The New Frontiers" by Uresh Vahalia (1996) (See here for 2nd edition) are like established books on UNIX OS internals. But the thing is these books are pretty much outdated. So, Is there any recent books that covers internals of recent Unix OS? How about books on other Unix operating systems? They seem to be recent than above books but how close are they to OpenBSD/FreeBSD? Solaris 10 and OpenSolaris Kernel Architecture, 2 edition (July 20, 2006) HP-UX 11i Internals (February 1, 2004) I really don't prefer HP-UX as its not open source.

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• CMS + Blog engines for personal website

  - by Shawn Mclean

  I want to create a personal website where I show off my work, write blog posts, etc. I dont want to create my own, but I'm seeking one flexible enough for me to write my own codes for it if needed. For eg, I'd like to create a page with jquery functionality and backend code. Features I'm looking for: Blog engine similiar to wordpress OpenId login (comments, etc) Exporting content in an event I want to switch engines. I have alot of knowledge in .net and small amount in php, so any of these frameworks can work for me.

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• Rails gems and plugins usage in Netbeans

  - by LearnRails

  Hi, I am working with rails 2.3 with netbeans 6.5.1 on vista. I want to install more plugins from Git in netbeans like shoulda, cucumber etc. I have these questions: 1) I do not have much knowledge of Git. Is it necessary to install Git to make use of the Git plugins in netbeans? Are gems and plugins dependant on each other? 2) In case Git is needed and I do install msysgit , for example I can use the command ruby script/plugin install http://github.com/thoughtbot/shoulda.git/ to install shoulda plugin. How to make netbeans use this plugin or how to include this plugin in netbeans? 3) Is RubyMine a better IDE for Rails than Netbeans in terms of more gems and plugins availability? Thanks

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• Web Forms 2.0: Editor & Libraries

  - by lacco

  Hi! I would like to build a web application where users can create forms with very few technical knowledge. Since they need "advanced" features like validations, required fields and some more, I am currently evaluating XForms and web forms 2.0 (from HTML 5 spec). Concerning web forms, my research couldn't find any answers for the following questions: Are there any (JavaScript) libraries out there which make web forms fully available in browsers which have currently no support for them (i.e. Firefox)? Is there a "web forms editor" which allows creating input and select fields, with setting attributes like the type, required, ...? It has to be something visual, and must create "nice" html. Any help/ hints would be appreciated!

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• How to Import a .bak file using MySQL?

  - by user682526

  I have no knowledge on MySQL and I have received a .bak file from one of my customer and he asked me to "import" this file using MySQL. I installed MysQL Community Server free download which installs MySQL Command Line Client. Now I don't know how to Import this .bak file and can't read the necessary data that I need. I tried installation of MySQL EE free trial as well but it doesn't give me anything that I can invoke the DB GUI so I can import the .bak file either. I'm frustrated now and can't go anywhere. Can you please help ? Thanks !

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• Reading for a junior ASP.NET C# web developer.

  - by William

  We have a new junior developer and I want him to start reading up on various topics in order to broaden his horizons. I am trying to group these into "areas" so that he can focus on getting a good general knowledge in on subject before moving on to another one. So far I have the following areas: Asp.net with C#, Webforms T-SQL CSS Can you provide good examples of reading material (preferably e-books so I can get them quicker) for him in each of those areas. Other areas and blogs to follow are also welcome.

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• Android equivalent work-around for View.getX() before API 11?

  - by user48998

  I'm using the getX() and getY() method on a view for some special dragging logic (not animation, i.e. I never use setX/Y methods, I just need the getters to check). However, I've come to realize that these are only available post-API 11. The docs for getX() say that is it the addition of the 'left' property and the 'translationX' property. All well and good, except get/setTranslationX() is only around since API 11 as well. I was wondering if there was any knowledge on what this method returns behind the scenes, so I could maybe put in a workaround. Thanks for any help - Chase

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• Learning networking fundamentals

  - by bplus

  Not having a CS degree has left large holes in my programming related knowledge. In particular I'd really like to learn some of the computer networking stuff I would have got in a good CS degree. The problem I really have is "not knowing what I don't know". So far I know I don't know anything about the following (as far as computer networks are concearned) -sockets -ports -internet protocol (the whole IP stack I keep hearing about). Can anyone add more to the list? Can anyone suggest a project (writing a toy web server?) Thanks in advance

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• Base64 encoding in PHP not working for '&' and '#' ?

  - by Angad

  My knowledge about base64 is pretty limited. I am using it as an alternative to string escaping in a content management system, for I had been warned about how weaknesses have been found in mysql_real_escape_string(); and quite sheepishly so, as I am aware of how it buffs text size up. PHP seems to truncate everything after an instance of # or & in the string; please help me out of this one. Also, comment on whether using base64 to maintain the 'trueness' of post content in the CMS is just plain retarded, or a wise move. Thanks for your time :)

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• Does the order of case in Switch statement can vary the performance?

  - by Bipul

  Let say I have a switch statement as below Switch(alphabet){ case "f": //do something break; case "c": //do something break; case "a": //do something break; case "e": //do something break; } Now suppose I know that the frequency of having Alphabet e is highest followed by a, c and f respectively. So, I just restructured the case statement order and made them as follows. Switch(alphabet){ case "e": //do something break; case "a": //do something break; case "c": //do something break; case "f": //do something break; } Will the second Switch statement better perform(means faster) than the first switch statement? If yes and if in my program I need to call this switch statement say many times, will that be a substantial improvement? Or if not in any how can I use my frequency knowledge to improve the performance? Thanks

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• Javascript alert instead of redirect in PHP mail script

  - by JCHASE11

  Thanks to Col. Shrapnel I am using a VERY basic PHP script to send emails. The form is located here. This is the script: <?php mail('[email protected]','Live Date Submission',implode("\n\n",$_POST)); header("Location: thankyou.html"); ?> When a user submits the form, they are redirected to a thankyou.html page. I want to edit the code to display a javascript alert, instead of a redirect. I don't have much PHP knowledge, so how would I edit this code to return a alert instead of a redirect?

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• Hiring a project or development manager: what are good interview questions?

  - by Totophil

  What questions would you ask a candidate applying for a software project or development manager position? Please could you submit one question per answer (with multiple answer if necessary) or a sequence of related questions. This way eventually all questions will get ordered by how good we all think they are. Please also provide a short guidance for evaluating possible answers. UPDATE: It seems that a large proportion of the answers so far are aimed at generic management skills. What would you ask someone who is going to manage software development, let's say in your organisation? What knowledge, skills and attitude will you be looking for in the candidate replies?

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