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• How to make an application scriptable in Linux

  - by arx

  I've written an application in C++ that takes a complex binary file format and translates it into human-readable text. Having edited the text you can recompile it back into the binary file format. This would be more useful if the application's internal object model was scriptable. On Windows I'd expose the objects using COM or .Net but I want this to work on Linux. I could embed a scripting language but that's a fair bit of work, and limits users to the scripting language I choose. Ideally, I'm looking for some way of exposing a scriptable DOM from my application that is: Widely support in scripting languages (without writing language-specific wrappers) Cross-platform (but Linux support is most important) In-process (but this isn't essential)

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• Is Android reference at android.com good enough

  - by the100rabh

  Hi, I am a C++ developer, but have a fair idea of Java as I learnt it in college 5years ago. I have been trying to learn programming for android. But instead of rushing to buy books, I have tried to read through the Android Dev Guide and learn from there making use of the sample applications. Thats besides SO ofcourse. I am trying to make some apps based on ideas I have. So my question is, Is it suitable or possible to learn android programming this way. Or is there something that I will be missing in all this.

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• Handling JSON and HTML templates in jQuery

  - by Toby Hede

  I have an ajax-enabled site that presents a lot of dynamic content by interpolating JSON values with HTML. This all works fine. BUT it means I have significant amounts of HTML all through my JavaScript. For example: var template = "<div>Foo: {bar}</div><div>Blah: {vtha}</div>"; template.interpolate({bar:"bar",blah:"vtha"}); I have cut this down a fair bit - some of my dynamic elements have quite a lot of HTML and a lot going on. I am using jQuery and I am building on Rails, so if there is something smart in either framework, that would be great. For reference, the String interpolation function used above is: String.prototype.interpolate = function (o) { return this.replace(/{([^{}]*)}/g, function (a, b) { var r = o[b]; return typeof r === 'string' || typeof r === 'number' ? r : a; } ); };

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• WebService Security

  - by LauzPT

  Hello, I'm developing an project, which consists in a webservice and a client application. It's a fair simple scenario. The webservice is connected to a database server, and the client consumes from the webserver in order to get information retrieved from the database. The thing is: 1. The client application can only display data after a previous authentication; 2. All the data transferred between Web Service and clients must be confidential; 3. Data integrity shouldn’t be compromised; I'm wondering what is the best way to achieve these requirements. The first thing I thought about, was sending the server a digital signature containing a client certificate, to be stored in the server, and used as comparison for authentication. But I investigated a little about webservice security, and I'm no longer certain that this is the best option. Can anyone give me an opinion about this? TIA

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• Ruby/python Script to convert html text to plain text in csv file

  - by Miau

  Hi all: So i have a large(ish) file in a csv format, that contains a column that has html and i need to transform that to plain text (ie readable by people ,ie with no script tags) I dont have much experience with ruby, but it seems like the perfect language to do this The File should still be in a cv format after the parsing ( ie, other columns should nto be disturbed) Helpz? Fair enough, I thought there might be a library that does that as long as the html was valid. The file looks something liek this "xxxx-15454ss", "xome name", "<div class=""myClass""><strong>The Vintage Junior </strong>offers the same specs as the Vintage Series but only in 3/4 Size ideal for Kids. the 57 Model is great value for a good quality guitar. For more info go to <a href=""www.somehting.com"">something</a> </div> " I m trying to include the common html tags we would be using Thanks

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• Django - Check users messages every request

  - by Hanpan

  Hi, I want to check if a user has any new messages each time they load the page. Up until now, I have been doing this inside of my views but it's getting fairly hard to maintain since I have a fair number of views now. I assume this is the kind of thing middleware is good for, a check that will happen every single page load. What I need it to do is so: Check if the user is logged in If they are, check if they have any messages Store the result so I can reference the information in my templates Has anyone ever had to write any middleware like this? I've never used middleware before so any help would be greatly appreciated.

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• Should all presentational images be defined in CSS?

  - by Grant Crofton

  I've been learning (X)HTML & CSS recently, and one of the main principles is that HTML is for structure and CSS for presentation. With that in mind, it seems to me that a fair number of images on most sites are just for presentation and as such should be in the CSS (with a div or span to hold them in the HTML) - for example logos, header images, backgrounds. However, while the examples in my book put some images in CSS, they are still often in the HTML. (I'm just talking about 'presentational' images, not 'structural' ones which are a key part of the content, for example photos in a photo site). Should all such images be in CSS? Or are there technical or logical reasons to keep them in the HTML? Thanks, Grant

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• The C vs. C++ way

  - by amc

  Hi, So I have to write a program that will iterate through an image and record the pixel locations corresponding to each color pixel that appears in it. For example, given http://www.socuteurl.com/fishywishykissy I need to find the coordinates of all yellow, purple, dark pink, etc pixels. In C++ I would use a hash table to do this. I would iterate through the image, check each pixel's value, look up that value and either add to a vector of pixel coordinates if it were found or add a new entry to the table if the value were not already there. The problem is that I may need to write this program in pure C instead of C++. How would I go about doing this in C? I feel like implementing a hash table would be pretty obnoxious and error-prone: should I avoid doing that? I'm pretty inexperienced with C and have a fair amount of C++ experience, if that matters. Thanks.

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• Why do so many mathematicians format code so poorly? [closed]

  - by marcog

  I have done a fair amount of programming together with mathematicians. Now I am even teaching some high school kids coming from a mathematics background how to program. Most of these people format their code so hideously it's hard to believe. I've even worked with and taught mathematicians who will fight the auto-indenter! Why is this so common amongst mathematicians? BTW, this is one reason I have started teaching Python. Yet still they find ways other than indentation to produce whacked coding styles!

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• PHP> Sort query results by name while letting each letter be on the top sometimes

  - by Don

  Hi, I'm currently working on a site that will display a list of online shops, Each shop will be stored on my database and I'll be using PHP to select and display them. But since those shops will pay me, I want to let each shop to be on the top of the list sometimes, (for example if the shop name starts with a "Z", they will probably complain for being on the bottom of the list all the time, so I want to keep it fair). So I thought about letting each letter be on the top of the list for an hour, but i have no idea how to do that.. Is that even possible? Thanks in advance!

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• New to Drupal -- how should I create a main page with a mix of dynamic and static content?

  - by Erode

  I apologize for the terribly basic question but I'm not even a particularly adept web dev. I've read that Drupal is great if you know exactly what you want to do (then the API is handy) but I don't even know what I need yet. That is what I am hoping to gain from this discussion. I want a main content page which has a fancy content slider (using jQuery or something) which will be a selector for showing some basic information on these 2 or 3 subjects. I'm stuck on where I should be writing this mix of markup. In the template? Create "content" through a content type? Since there's a fair share of CSS and markup required to do this, I don't know if I can do that through the "basic page" content type that was there. I'm looking for pointers that can teach me how I would become aware of what Drupal can and can not do. Thanks for reading, let me know if I need to clarify anything.

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• Best Online C++ Refresher

  - by Bill

  It's been a longtime since I've done any C++ (probably about 13 years, since I graduated college). I've developing in various others languages since then. My new gig uses a fair bit of C++. Any recommendations for getting bootstrapped? To clarify -- I don't need an "into to programming" book. E.g., what's a variable, flow control, etc. I understand the concepts of OO having implemented them, etc. I'm looking for the best way to get to the specifics of C++.

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• Preparing for a C#, ASP.NET, JavaScript interview

  - by halivingston

  I have an interview I'm prepping for, I've written A LOT of code, specifically in C# and ASP.NET. I've written fair amounts of JavaScript, but no OO stuff in it. So I'm definately going to brush up on that. I remember for a previous job interview, I was asked Java questions, like not super intricate, but detailed stuff. Now I'm looking for a book maybe that I can read through in a day (or two) and known all the crannies of C#, ASP.NET and JavaScript. Different books obviously I'll be honest, for the Java interview, I actually read The J2EE certification book, and it helped A LOT!

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• Is this a correct json format....

  - by chandru_cp

  I want to get a fair idea about json format... I am using php in which i have converted my result array to json like this $result = mysql_query("select dStud_id,dMarkObtained1,dMarkObtained2, dMarkObtained3,dMarkTotal from tbl_internalmarkallot"); $JsonVar = json_encode($res); echo "<input type='text' name='json' id='json' value ='$JsonVar'>"; And the text box shows {"0":"101","dStud_id":"101","1":"60","dMarkObtained1":"60","2":"80", "dMarkObtained2":"80","3":"80","dMarkObtained3":"80","4":"220","dMarkTotal":"220"} Is this a correct json format....

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• Eclipse + CVS use custom commit

  - by WizKiranPuttur

  Hi All, My admin has set up the "cvs commit" in a very non traditional way, instead of typing "cvs commit" I use the admin provided "scriptname modified file" to checkin the file to CVS. I am using Eclipse to my day to day work and till now I am using the Eclipse CVS Plugin to checkout the repo,update,compare,etc and use the command line to checkin. I am getting annoyed by having to go to command line to do the commit, is there any way I can make Eclipse accept when I say commit it invokes the admin script instead of "cvs commit" ? I spoke to Admin and moving the under the cvs pre-commit hooks is not an option. What can I do ? I know fair amount of "Java" I am willing to do some changes to CVS plugin if I know how and where. Thanks

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• Is there a major downside to using .htaccess files in your svn/git repository?

  - by Rob

  If our .htaccess files are purely for mod rewrites, is there a security / development downside to committing .htaccess files alongside other files in your repository? For various reasons (our SEO optimisers like to add pretty urls as new promotions occur, etc) we need a fair few rewrite rules inside these files. Would I be better off pushing the routing into php-land and dealing with it there? Or is reading from a .htaccess via apache fine? The .htaccess files are not exposed via the web server, so that's not a security risk.

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• Separate one-off code paths

  - by DeadMG

  I'm implementing an application with different code paths that shall be chosen once at startup and then fixed forevermore for that execution- for example, choosing D3D11 or D3D9 rendering path. Obviously I don't want to duplicate all my other code. Is run-time inheritance (no virtual inheritance) a fair solution? I don't want to waste a bunch of performance making virtual lookups when the type was fixed long ago. Not just that, but it makes me nervous that the functions can't be inlined and whether or not it affects RVO and NRVO and such. Am I just being over-concerned about this?

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• How-to handle errors in Vim Script ?

  - by ereOn

  In my .vimrc file, I have the following function, which folds the licensing information on the top of some .hpp and .cpp files: " Skip license function! FoldLicense() if !exists("b:foldedLicense") let b:foldedLicense = 1 1;/\*\//fold endif endfunction au BufRead *.hpp call FoldLicense() au BufRead *.cpp call FoldLicense() This works well, but if I open a .cpp file which doesn't have any licensing information block, Vim complains that the pattern is not found. Fair enough, but is there a way so that he stops complaining and just does nothing if the pattern is not found ? Thanks !

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• Performance improvement to a big if clause in SQL Server function

  - by Miles D

  I am maintaining a function in SQL Server 2005, that based on an integer input parameter needs to call different functions e.g. IF @rule_id = 1 -- execute function 1 ELSE IF @rule_id = 2 -- execute function 2 ELSE IF @rule_id = 3 ... etc The problem is that there are a fair few rules (about 100), and although the above is fairly readable, its performance isn't great. At the moment it's implemented as a series of IF's that do a binary-chop, which is much faster, but becomes fairly unpleasant to read and maintain. Any alternative ideas for something that performs well and is fairly maintainable?

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• What is the absolute fastest way to implement a concurrent queue with ONLY one consumer and one producer?

  - by JohnPristine

  java.util.concurrent.ConcurrentLinkedQueue comes to mind, but is it really optimum for this two-thread scenario? I am looking for the minimum latency possible on both sides (producer and consumer). If the queue is empty you can immediately return null AND if the queue is full you can immediately discard the entry you are offering. Does ConcurrentLinkedQueue use super fast and light locks (AtomicBoolean) ? Has anyone benchmarked ConcurrentLinkedQueue or knows about the ultimate fastest way of doing that? Additional Details: I imagine the queue should be a fair one, meaning the consumer should not make the consumer wait any longer than it needs (by front-running it) and vice-versa.

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• Upgrading IIS web sever framework 2.0 to 3.5 considerations

  - by Grant

  Hi, i will be responcible for upgrading an IIS web server from the Microsoft .NET framework v2.0 to v3.5. I am wondering if there is anything special i need to know or any caveats i should be aware of before proceding? The site gets a fair number of hits per day and I will be taking it down and performing the upgrade at an off-peak time. Aside from double clicking the installer is there anything i need to know? Will the server need to be rebooted afterwards, does the installer handle all of the configuration changes? etc.. Thanks.

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• C++ DWORD* to BYTE*

  - by NomeSkavinski

  My issue, i am trying to convert and array of dynamic memory of type DWORD to a BYTE. Fair enough i can for loop through this and convert the DWORD into a BYTE per entry. But is their a faster way to do this? to take a pointer to DWORD data and convert the whole piece of data into a pointer to BYTE data? such as using a memcpy operation? I feel this is not possible, im not requesting an answer just an experienced opinion on my approach, as i have tried testing both approaches but seem to fail getting to a solution on my second solution. Thanks for any input, again no answers just a point in the right direction. Nor is this a homework question, i felt that had to be mentioned.

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• Broadcast message or file to nearby Bluetooth devices

  - by Medjeti

  Hiya, A client of ours is attending a business fair and would like to push some sort of "welcome message" to people visiting their space. I'm not too familiar with Bluetooth, so I have a few questions: What kind of content can you transfer via Bluetooth? (Is it files only or is it possible to send a simple text message?) Is it possible to push content only to recipients within a certain distance? (ie. based on signal strength or similar) Can anybody recommend a piece of software that can do some or all of the above? If necessary we could program a custom solution ourselves (.NET), but I'm sure there must be a program out there that can do the job. I've googled a bit and came across the 32feet.NET framework - does anybody have any experience with this framework? Thanks in advance for any suggestions!

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• Capturing Mac OS X System Audio output with Python

  - by richbs

  Hello, I've been trying to "hijack" the Mac OS X system audio using PyAudio and save to a wav in python. That is, I do not want to record from an input device such as a microphone. I want to grab the sound output from any or all applications. I have followed the tutorials on the PyAudio site but these do not appear to cover my use case and when I try to read from the output stream I unsurprisingly get the paCanNotReadFromAnOutputOnlyStream exception. Fair enough! Is there a way to do what I am proposing with the PyAudio or other FOSS Python Library?

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• C++ - Where do i start?

  - by richzilla

  Hi All, As a bit of a side project while I'm on my summer break from uni, I've decided to have a look at C++, and get the hang of the basics. I'm by no means a programming novice, I've done web development before with PHP and Ruby, and I've done a fair bit of work with compiled languages (Java / C#). However, C++ seems to be a more significant undertaking. Basically I'm wanting pointers to the best resources for learning C++, as well as some idea as to areas I could do with reading up on (That I might not have come across before). Any help would be hugely appreciated. Thanks

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