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  • Open source software

    - by Maurizio Reginelli
    What is your opinion about open source software? It is helpful in many situation, for example a community can correct many bugs. But I also think that it can be dangerous for a software developer. If you develop an application and share its source code, a lot of applications can grow with a little effort, simply copying part of your code. For example, if you develop a library in WPF which can be used to create charts, and share your code, this can be dangerous for companies which main business is WPF component developing. And obviously it is dangerous for a software developer who works in that company. What do you think about this?

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  • What makes a bad programming language bad?

    - by sub
    We have all seen things like the typing system of JavaScript (There is a funny post including a truth table somewhere around here). I consider this one of the main things that makes a programming language bad. Other things that spring to mind: Bad Error messages (Either obfuscated so you can't figure out whats wrong, not existing or simply too long and red) The language wasn't planned and just grew uncontrolled in all directions (PHP?) The language encourages bad programm(er/ing) habits such as: Global variables everywhere, bad variable names Inconsistent naming conventions inside the language I can't come up with any more at the moment and would be very happy to read what you think about this. What shouldn't be missing in a language created to be as bad (from the perspectives of the programmer, the company that hires to programmer, the team leader and the customer) as possible? (I ask this because I'm designing a bad, experimental language at the moment)

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  • How to secure connection between PHP and Android

    - by Elad Cohen
    I am developing an application for the Android that requires a connection with PHP pages in order to add sensitive data to a database that will affect the application. Since it's very easy to reverse engineer an android app, one can simply find the url where the data is sent to and manipulate it. I thought about creating a registration based on IMEI, but one can still able to manipulate it for his malicious purposes. I have also checked OAuth but I didn't really understand how it works and if it can help in my condition. What can I do to fully secure my application? Thanks in advance! EDIT: By the way, what I am mostly trying to achieve here is to make sure the requests are being sent from an Android and not from any other device.

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  • ServiceTracker in OSGi r4.1

    - by Schildmeijer
    Im using a org.osgi.util.tracker.ServiceTracker (PrintableServiceTracker implements ServiceTrackerCustomizer and simply prints when a new service is added). Filter filter = bc.createFilter("(objectClass=se.enea.print.Printable)"); tracker = new ServiceTracker(bc, filter, new PrintableServiceTracker(bc)); I've read about "pseudo registration" in the new ebook "OSGi in action" and I wonder if I have to do pseudo registration explicitly or if the framwork handles this automatically? (Will already installed Printable services be caught by the ServiceTracker. will ServiceTracker.addingService(ServiceReference) be called for each of the pre installed Printable services)

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  • Django ORM QuerySet intersection by a field

    - by Sri Raghavan
    These are the (pseudo) models I've got. Blog: name etc... Article: name blog creator etc User (as per django.contrib.auth) So my problem is this: I've got two users. I want to get all of the articles that the two users published on the same blog (no matter which blog). I can't simply filter the Article model by both users, because that would yield the set of Articles created by both users. Obviously not what I want. but can I filter somehow to get all of the articles where a field of the object matches between the two querysets?

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  • Running Perl Scripts on servers that don't have the modules

    - by envinyater
    I need to run a perl script to gather system information that will be deployed and executed on different unix servers. Right now I am writing it and testing it, and I'm receiving this error. Can't locate XML/DOM.pm in @INC (@INC contains: /usr/local/lib64/perl5 /usr/local/share/perl5 /usr/lib64/perl5/vendor_perl /usr/share/perl5/vendor_perl /usr/lib64/perl5 /usr/share/perl5 .) at test.pl line 7. BEGIN failed--compilation aborted at test.pl line 7. So I am simply using XML::DOM which should be part of Perl but it isn't for this version on this particular server which is 5.10.1. Anyways, is there a way I can create and design my script and package modules into it while keeping the .pl extension, which is the requirement for this script?

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  • TreeMap not properly returning values

    - by smessing
    I have the following TreeMap: TreeMap<String, Integer> distances = new TreeMap<String, Integer>(); and it contains both strings, "Face" and "Foo", with appropriate values, such that: System.out.println(distances); Yields: {Face=12, Foo=2} However, distances.get(Face) returns null, even though distances.get(Foo) properly returns 2. Previously, distances.get(Face) worked, but for some reason, it stopped working. Note I print out the map right before calling get() for both keys, so I haven't accidentally changed Face's value to null. Has anyone else every encountered this problem? Is there anything I can do? I'm having a terrible time simply trying to figure out how to debug this problem.

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  • Including libraries in project. Best practise.

    - by mridang
    Hi guys, I'm writing a Python open-source app. My app uses some open source Python libraries. These libraries in turn use other open-source libraries. I intend to release my code at Sourceforge or Google Code but do I need to include the sources of the other libraries? Is this a good practice? ...or should I simply write this information into a README file informing the use about the other required libraries. I've placed all these libraries into a libs sub folder in my source directory. When checking my code into SVN, should I use something called svn:externals to link to other sources? Is there a way to dynamically update my libraries to the latest version or is this something I have to do manually when I release a new version. My sincerest apologies if my question sounds vague but I'm pretty lost in this matter and I don't know what to Google for. Thanks all.

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  • Stubbing ActiveRecord result arrays

    - by Matthias
    Using Ruby 1.8.6, stubbing a finder method to return an Array does not work when the code under test calls the 'count' method on the result: User.any_instance.stubs(:friends).returns([user1, user2]) That's because Array.count has only been added in Ruby 1.8.7. Rails also adds a count method dynamically, I believe through the ActiveRecord::Calculations module. Is there any way to turn this result array into something that behaves exactly as the special Array kind returned by a Rails finder method? When paginating results, it's easy: I can simply call [].paginate. But that doesn't work with normal finder results. I tried [].extend(ActiveRecord::Calculations) but that doesn't work either.

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  • jQuery AJAX not redirecting?

    - by MidnightLightning
    I have a simple PHP page (for testing) that simply calls header("Location: http://www.example.com");exit;, which resides on the same server, in the same directory as another file with the following jQuery Javascript: $(document).ready(function() { jQuery.ajax({ type : 'GET', url : 'bounce.php', error : function(xhr, status, error) { console.log("ERROR: ", xhr, xhr.status, xhr.getAllResponseHeaders()); }, complete : function(xhr, status) { // Get headers of the response console.log("COMPLETE: ", xhr, xhr.status, xhr.getAllResponseHeaders()); } }); }); I was expecting (from several other StackOverflow responses) for the xhr.status to return "302", but instead the AJAX call is triggering the "error" event (and then the "complete" event), and xhr.status is returning 0 (zero), and .getAllResponseHeaders() is coming back null (in both the error, and complete functions). Firebug is showing the "302 Moved Temporarily", and the response headers. So why is this triggering the error event, and not passing along the proper 302 code, and headers? Is this something to do with the Same Origin since the bouncing script and the fetching script are both on the same server? Is this jQuery or Javascript's fault?

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  • Changing Render Kits in Browser

    - by John
    I'm working on a project to develop a cross-browser testing web app. Simply put, I'm tired of having to maintain multiple browsers on the same system and IE in VMware solely for the purpose of testing. Does anyone know if there is any way to change the render kit programmatically? For example, if I insert a URL, I would be able to load the URL and switch the browser render within a frame of some assortment. I am experienced with PHP, JS, and RoR if there is a solution using any of those. Thank you! John

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  • BigDecimal serialization in GWT

    - by Domchi
    What is your preferred approach to serializing BigDecimal in GWT? Are there any clever workarounds, or do you simply use Double or String? Of all of the GWT pains this is so far the biggest; I'd hate to create two models, one for server and one for GWT, and transform data from one to the other. On the other hand, while I don't care much about using String instead of, say, javax.xml.datatype.Duration, I have to use BigDecimal on the server because of the calculations, which means either two models and conversion, or tons of tiny conversions to BigDecimal for every calculation.

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  • best way to externalize HTML in GWT apps?

    - by Limbic System
    What's the best way to externalize large quantities of HTML in a GWT app? We have a rather complicated GWT app of about 30 "pages"; each page has a sort of guide at the bottom that is several paragraphs of HTML markup. I'd like to externalize the HTML so that it can remain as "unescaped" as possible. I know and understand how to use property files in GWT; that's certainly better than embedding the content in Java classes, but still kind of ugly for HTML (you need to backslashify everything, as well as escape quotes, etc.) Normally this is the kind of thing you would put in a JSP, but I don't see any equivalent to that in GWT. I'm considering just writing a widget that will simply fetch the content from html files on the server and then add the text to an HTML widget. But it seems there ought to be a simpler way.

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  • Getting weird python error when I run a simple django script in Eclipse, not happening in console

    - by Rhubarb
    I am running a basic script that sets up the django environment by itself, to enable me to test the ORM features of django without having to implement web pages. The script then imports one of the types defined in my models. This error doesn't happen when I run this script from iPython, only from eclipse. Simply doing this import causes a weird exception like the following: Exception AttributeError: "'NoneType' object has no attribute 'print_exc'" in <bound method Signal._remove_receiver of <django.dispatch.dispatcher.Signal object at 0x026802B0>> ignored My script is as follows: from django.core.management import setup_environ import settings setup_environ(settings) from stats.models import Person for p in Person.objects.all(): print p.Name

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  • C# .NET 4.0 and Generics

    - by Mr Snuffle
    I was wondering if anyone could tell me if this kind of behaviour is possible in C# 4.0 I have an object hierarchy I'd like to keep strongly typed. Something like this class ItemBase {} class ItemType<T> where T : ItemBase { T Base { get; set; } } class EquipmentBase : ItemBase {} class EquipmentType : ItemType<EquipmentBase> {} What I want to be able to do to have something like this ItemType item = new EquipmentType(); And I want item.Base to return type ItemBase. Basically I want to know if it's smart enough to strongly typed generic to a base class without the strong typing. Benefit of this being I can simply cast an ItemType back to an EquipmentType and get all the strongly typedness again. I may be thinking about this all wrong...

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  • How is Magento when it comes to adding custom functionality?

    - by ohsnapy
    hi, How is working with Magento when it comes to adding custom functionality? From an outsiders view the framework looks very complicated and it's hard to gage what is and is not possible. What are your experiences? Is it a difficult framework to get it to do what you want? Are there things that simply cannot be customized in Magento? How difficult is it to manage customizations when upgrading to latest versions,etc.. Any feedback/personal experiences would be great. Examples of highly customized Magento sites would be great too. Thanks for your help.

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  • JQuery UI Drop Disable on selected elements

    - by Suneth Kalhara
    i want to add drop limit on circles, i wrote a scrit for dragging circles the problem is user can drop circle on another circle, i don't want to allow it, simply i need to revert if the user drag and drop circle on another circle. i write some codes for this. but this not working for me, it always revert the dropped circle. here is my example url http://webxtreams.net/demoprofiles004/circledragger.html here is js code i run on fire bug $(".circle").draggable({ revert: 'invalid' }); $(".circle").droppable({ accept: function(el) { return el.hasClass('.circle'); } }); please help me to do that. have another little question - can we track the reverting event on this, i need to repaint the lines when reverting the circle :)

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  • Regular expression replace in PL/pgSQL

    - by dreamlax
    If I have the following input (excluding quotes): "The ancestral territorial imperatives of the trumpeter swan" How can I collapse all multiple spaces to a single space so that the input is transformed to: "The ancestral territorial imperatives of the trumpeter swan" This is going to be used in a trigger function on insert/update (which already trims leading/trailing spaces). Currently, it raises an exception if the input contains multiple adjacent spaces, but I would rather it simply transforms it into something valid before inserting. What is the best approach? I can't seem to find a regular-expression replace function for PL/pgSQL. There is a text_replace function, but this will only collapse at most two spaces down to one (meaning three consecutive spaces will collapse to two). Calling this function over and over is not ideal.

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  • Attempt to set foreign key to nonexistent table, sf_guard_user!

    - by Stick it to THE MAN
    I am using SF 1.3.2 with Propel ORM on Ubuntu 9.10. I created a new SF project and simply copied the sfGuard plugin folder from a pre-existing SF 1.32 project. I manually edited the schema.yml in the new project, adding a user table that reference the the sfGuard table. When I run propel:build-sql, I got the task failed, with the error message: Attempt to set foreign key to nonexistent table, sf_guard_user! I'm not sure why this error is occurring, (the error dosent make sense to me, since the sfGuard plugin works fine with the previous project, with no changes made. what am I missing?? BTW, I have not created any apps in the project yet. I am just running the build-sql task first, to make sure that Propel has no problems with parsing my yml files etc.

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  • Rotating text in postscript

    - by Mrgreen
    I have the following postscript code: /outputtext { /data exch def /rot exch def /xfont exch def /Times-Roman findfont xfont scalefont setfont /y1 exch def /x1 exch def x1 y1 moveto rot rotate data show } def % x y fontsize rotation (text) outputtext 20 300 12 0 (text1) outputtext 20 400 12 90 (text2) outputtext 20 500 12 90 (text3) outputtext 20 600 12 0 (text4) outputtext showpage The function simply outputs text based on a x, y co-ords and the text to display, there is also a variable for rotation. For some reason when I output text with a rotation of 0 degrees, all other text that comes after that will not work, I can't seem to figure out why this is the case. In the example above, 'text1' and 'text2' will display, but not 3 and 4.

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  • How to document an XML Schema?

    - by lucas clemente
    I have developed a XML schema for an application I wrote. Now I want to document the valid structure for the end user, however I can't come up with any natural way to do this. I've seen things like xs3p, which essentially converts a xsd schema to a HTML representation, however that doesn't look like good documentation to me; the user shouldn't need to know anything about schemas to understand what he is allowed to do. Any ideas how to document this? Any programs / editors / graphical solutions or simply concepts I can build on?

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  • C++0x regex in GCC

    - by rwallace
    The following code: #include <regex> using namespace std; (snippage) regex_search(s, m, re); works in Microsoft C++, but GCC 4.4.3 gives the following error message: /usr/include/c++/4.4/tr1_impl/regex:2255: warning: inline function ‘bool std::regex_search(_Bi_iter, _Bi_iter, std::match_results<_Bi_iter, _Allocator&, const std::basic_regex<_Ch_type, _Rx_traits&, std::regex_constants::match_flag_type) [with _Bi_iter = __gnu_cxx::__normal_iterator, std::allocator , _Allocator = std::allocator, std::allocator , _Ch_type = char, _Rx_traits = std::regex_traits]’ used but never defined Of course it wouldn't surprise me if regex were simply one of the C++0x features still on the to-do list for GCC, but what I'm scratching my head over is, in that case, why does it happily take the include directive, variable declarations etc. and only trip over the function call (which it even seems to understand). Is there something I'm missing?

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  • MS Word paste into tinymce - retain tabulators

    - by jdog
    Hi, I have a 5 year old web application which runs tinymce 2.0.5.1 In this version it is possible - in IE 6,7,8 only to paste from MS Word and retain the tab characters. What we have done is to add a callback: paste_insert_word_content_callback : "findtabs" function findtabs(type, content) { if (type == "before"){ content = content.replace(/( This functionality is important to the client as they have 100s of MS Word documents of quote templates which use tabulators for formatting. Because of another problem suspected to be caused by TinyMCE, we'd like to upgrade to the current TinyMCE version 3.2.7 However in this version the resulting paste code does not contain anything that seems to 100% link to a tabulator. If pasted into an empty textarea, I get something like , if pasted into a I simply a space character. Can anyone recommend how to detect tabulators when pasting from MS Word?

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  • issue writing to spreadsheet using EPPlus

    - by Andy
    I'm simply trying to edit a spreadsheet that has text already written into to change the text to be blank. However its not working. the method seems to do nothing. my code is: public static void ClearCells(string SpreadsheetFilePath) { var SpreadsheetPath = new FileInfo(SpreadsheetFilePath); var package = new ExcelPackage(SpreadsheetPath); ExcelWorkbook workBook = package.Workbook; if (workBook != null) { if (workBook.Worksheets.Count > 0) { ExcelWorksheet currentWorksheet = workBook.Worksheets.First(); currentWorksheet.SetValue(1, 1, "hello123"); } } } There is no runtime error. It runs, completes and the spreadsheet is unchanged. I don't know why.

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  • Including a pyd directly in a setup.py file

    - by Philippe Beaudoin
    I have a complex build process to generate a couple of python extension modules (.pyd). I want to include these in my setup.py for use with distutils. The distutils page talks in length about how to add extension modules from source, but I'd want to simply package these precompiled .pyd. What is the best practice to do this? Eventually, I'd also like to freeze everything in an executable with py2exe. Will I be able to do this if I directly specify the .pyd?

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