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  • Many-to-many relations in RDBMS databases

    - by Industrial
    What is the best way of handling many-to-many relations in a RDBMS database like mySQL? Have tried using a pivot table to keep track of the relationships, but it leads to either one of the following: Normalization gets left behind Columns that is empty or null What approach have you taken in order to support many-to-many relationships?

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  • Microsoft.Practices.ServiceLocation and TryGetInstance

    - by Feryt
    Why Microsoft.Practices.ServiceLocation.IServiceLocator does not offer TryGetInstance()? I need to get generic validator instance ServiceLocator.Current.GetInstance<IEntityValidator<TEntity>>() but not all Entities has registered validator. The only solution i found is to use try{}catch{} block, but i dont like this approach.

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  • Externalizing Grails Datasource configuration

    - by miek
    Grails 1.x allows using external configuration files by setting the grails.config.locations directive. Is there a similar approach available for externalizing the database configuration in Datasource.groovy (without setting up JNDI)? It would prove helpful to be able to configure DB credentials in a simple configuration file outside the application. Thanks in advance!

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  • Dataflow Programming - Patterns and Frameworks

    - by Styrac
    I just came across the proposed Boost::Dataflow library. It seems like an interesting approach and I was wondering if there are other such alternative frameworks for C++, and if there are any related design patterns. I have not ruled out Boost::Dataflow, I am just looking into any available alternatives so I can understand the domain and my options better (or roll my own if necessary).

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  • PHP real time chat with ajax polling

    - by xRobot
    I need to create a chat similar to facebook chat. I am thinking to use ajax polling ( to send request every 2-3 seconds ). Is this a good approach ? Or I need to use other server side languages like erlang and server-comet ?

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  • Using QT to build a WYSIWYG Editor for a Custom Markup Language

    - by Aaron
    I'm new to QT, and am trying to figure out the best means of creating a WYSIWYG editor widget for a custom markup language that displays simple text, images, and links. I need to be able to propagate changes from the WYSIWYG editor to the custom markup representation. As a concrete example of the problem domain, imagine that the custom markup might have a "player" tag which contains a player name and a team name. The markup could look like this: Last week, <player id="1234"><name>Aaron Rodgers</name><team>Packers</team></player> threw a pass. This text would display in the editor as: Last week, Aaron Rodgers of the Packers threw a pass. The player name and the team name would be editable directly within the editor in standard WYSIWYG fashion, so that my users do not have to learn any markup. Also, when the player name is moused-over, a details pop-up will appear about that player, and similarly for the team. With that long introduction, I'm trying to figure out where to start with QT. It seems that the most logical option would be the Rich Text API using a QTextDocument. This approach seems less than ideal given the limitations of a QTextDocument: I can't figure out how to capture navigation events from clicking on links. Following links on click seems to only be enabled when the QTextEdit is readonly. Custom objects that implement QTextObjectInterface are ignored in copy-and-paste operations Any HTML-based markup that is passed to it as Rich Text is retranslated into a series of span tags and lots of other junk, making it extremely difficult to propagate changes from the editor back to the original custom markup. A second option appears to be QWebKit, which allows for live editing of HTML5 markup, so I could specify a two-way translation between the custom markup and HTML5. I'm not clear on how one would propagate changes from the editor back to the original markup in real-time without re-translating the entire document on every text change. The QWebKit solutions looks like awfully bulky to me (Learning WebKit along with QT) to what should be a relatively simple problem. I have also considered implementing the WYSIWYG with a custom class using native QT containers, labels, images, and other widgets manually. This seems like the most flexible approach, and the one most likely not to run into unresolvable problems. However, I'm pretty sure that implementing all the details of a normal text editor (selecting text, font changes, cut-and-paste support, undo/redo, dragging of objects, cursor placement, etc.) will be incredibly time consuming. So, finally, my question: are there any QT gurus out there with some advice on where to start with this sort of project? BTW, I am using QT because the application is a desktop application that needs platform independence.

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  • GWT 1.4 TO 2.0 UiBinder

    - by manu sinha
    Hi I am upgrading a project with around 60 java classes, from 1.4 to 2.0 . Apart from replacing deprecated functions, adding generics, will converting the whole project into UI Binder approach i.e. XML and Corresponding working Java classes, be recommended. Or shall i go on adding new UI requirments using Ui Binder and leaving the existing code as it is?

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  • Phone Application For .Net

    - by Terry
    Hello guys, As a .net developer main c#, I want to know what would be the best approach for me to develop Phone application that runs on major phones. Just to let you know Iphone is out of the question because of the costs that are involved, not ready to buy Mac book. I want something I can develop within Windows operating system, Android could have been the best option but it does not integrated well with .net. Any idea please ? Terry

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  • URL rewriting IIS6

    - by GigaPr
    Hi i was using HttpModule to Perform Extension-Less URL Rewriting as explained at http://weblogs.asp.net/scottgu/archive/2007/02/26/tip-trick-url-rewriting-with-asp-net.aspx Approach 3: works perfectly in IIS7, now i just published the solution to the live environment it doesnt work. the reason seems to be the fact that they are running IIS6 the question is does anyone now any quick solution to make it work in IIS6 without having to change all the code? thanks

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  • When using a mocking framework and MSPEC where do you set your stubs

    - by Kev Hunter
    I am relatively new to using MSpec and as I write more and more tests it becomes obvious to reduce duplication you often have to use a base class for your setup as per Rob Conery's article I am happy with using the AssertWasCalled method to verify my expectations, but where do you set up a stub's return value, I find it useful to set the context in the base class injecting my dependencies but that (I think) means that I need to set my stubs up in the Because delegate which just feels wrong. Is there a better approach I am missing?

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  • LINQ To objects: Quicker ideas?

    - by SDReyes
    Do you see a better approach to obtain and concatenate item.Number in a single string? Current: var numbers = new StringBuilder( ); // group is the result of a previous group by var basenumbers = group.Select( item => item.Number ); basenumbers.Aggregate ( numbers, ( res, element ) => res.AppendFormat( "{0:00}", element ) );

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  • Using icons in Android preferences

    - by hgpc
    I would like some of my preferences to have icons, like the Settings app. I guess one way of doing this would be to copy all the relevant code and resources from the Settings app, but it seems like overkill for a couple of icons. Also I don't like the idea of having to duplicate the code and resources in each project that requires settings icons. Has anyone solved this already with a simpler or resource-free approach?

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  • iPhone niche applications

    - by user104295
    Hi there, we want to develop a small utility for the iPhone for a very small set of users... We're thinking about developing it with PhoneGap/html/javascript as we want to make it available under other mobile platforms. Given that it's only for a small number of users within a particular organisation, would we submit that to AppStore? Is App Store meant for general public applications? Any recommendations on how to approach this? thanks

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  • Apache + Codeigniter + New Server + Unexpected Errors

    - by ngl5000
    Alright here is the situation: I use to have my codeigniter site at bluehost were I did not have root access, I have since moved that site to rackspace. I have not changed any of the PHP code yet there has been some unexpected behavior. Unexpected Behavior: http://mysite.com/robots.txt Both old and new resolve to the robots file http://mysite.com/robots.txt/ The old bluehost setup resolves to my codeigniter 404 error page. The rackspace config resolves to: Not Found The requested URL /robots.txt/ was not found on this server. **This instance leads me to believe that there could be a problem with my mod rewrites or lack there of. The first one produces the error correctly through php while it seems the second senario lets the server handle this error. The next instance of this problem is even more troubling: 'http://mysite.com/search/term/9 x 1-1%2F2 white/' New site results in: Bad Request Your browser sent a request that this server could not understand. Old site results in: The actual page being loaded and the search term being unencoded. I have to assume that this has something to do with the fact that when I went to the new server I went from root level htaccess file to httpd.conf file and virtual server default and default-ssl. Here they are: Default file: <VirtualHost *:80> ServerAdmin webmaster@localhost ServerName mysite.com DocumentRoot /var/www <Directory /> Options +FollowSymLinks AllowOverride None </Directory> <Directory /var/www> Options -Indexes +FollowSymLinks -MultiViews AllowOverride None Order allow,deny allow from all RewriteEngine On RewriteBase / # force no www. (also does the IP thing) RewriteCond %{HTTPS} !=on RewriteCond %{HTTP_HOST} !^mysite\.com [NC] RewriteRule ^(.*)$ http://mysite.com/$1 [R=301,L] RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule ^(.+)\.(\d+)\.(js|css|png|jpg|gif)$ $1.$3 [L] # index.php remove any index.php parts RewriteCond %{THE_REQUEST} /index\.(php|html) RewriteRule (.*)index\.(php|html)(.*)$ /$1$3 [r=301,L] # codeigniter direct RewriteCond $0 !^(index\.php|assets|robots\.txt|sitemap\.xml|favicon\.ico) RewriteRule ^.*$ index.php [L] </Directory> ScriptAlias /cgi-bin/ /usr/lib/cgi-bin/ <Directory "/usr/lib/cgi-bin"> AllowOverride None Options +ExecCGI -MultiViews +SymLinksIfOwnerMatch Order allow,deny Allow from all </Directory> ErrorLog ${APACHE_LOG_DIR}/error.log # Possible values include: debug, info, notice, warn, error, crit, # alert, emerg. LogLevel warn CustomLog ${APACHE_LOG_DIR}/access.log combined Alias /doc/ "/usr/share/doc/" <Directory "/usr/share/doc/"> Options Indexes MultiViews FollowSymLinks AllowOverride None Order deny,allow Deny from all Allow from 127.0.0.0/255.0.0.0 ::1/128 </Directory> </VirtualHost> Default-ssl File <IfModule mod_ssl.c> <VirtualHost _default_:443> ServerAdmin webmaster@localhost ServerName mysite.com DocumentRoot /var/www <Directory /> Options +FollowSymLinks AllowOverride None </Directory> <Directory /var/www> Options -Indexes +FollowSymLinks -MultiViews AllowOverride None Order allow,deny allow from all RewriteEngine On RewriteBase / RewriteCond %{SERVER_PORT} !^443 RewriteRule ^ https://mysite.com%{REQUEST_URI} [R=301,L] RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule ^(.+)\.(\d+)\.(js|css|png|jpg|gif)$ $1.$3 [L] # index.php remove any index.php parts RewriteCond %{THE_REQUEST} /index\.(php|html) RewriteRule (.*)index\.(php|html)(.*)$ /$1$3 [r=301,L] # codeigniter direct RewriteCond $0 !^(index\.php|assets|robots\.txt|sitemap\.xml|favicon\.ico) RewriteRule ^.*$ index.php [L] </Directory> ScriptAlias /cgi-bin/ /usr/lib/cgi-bin/ <Directory "/usr/lib/cgi-bin"> AllowOverride None Options +ExecCGI -MultiViews +SymLinksIfOwnerMatch Order allow,deny Allow from all </Directory> ErrorLog ${APACHE_LOG_DIR}/error.log # Possible values include: debug, info, notice, warn, error, crit, # alert, emerg. LogLevel warn CustomLog ${APACHE_LOG_DIR}/ssl_access.log combined Alias /doc/ "/usr/share/doc/" <Directory "/usr/share/doc/"> Options Indexes MultiViews FollowSymLinks AllowOverride None Order deny,allow Deny from all Allow from 127.0.0.0/255.0.0.0 ::1/128 </Directory> # SSL Engine Switch: # Enable/Disable SSL for this virtual host. SSLEngine on # Use our self-signed certificate by default SSLCertificateFile /etc/apache2/ssl/certs/www.mysite.com.crt SSLCertificateKeyFile /etc/apache2/ssl/private/www.mysite.com.key # A self-signed (snakeoil) certificate can be created by installing # the ssl-cert package. See # /usr/share/doc/apache2.2-common/README.Debian.gz for more info. # If both key and certificate are stored in the same file, only the # SSLCertificateFile directive is needed. # SSLCertificateFile /etc/ssl/certs/ssl-cert-snakeoil.pem # SSLCertificateKeyFile /etc/ssl/private/ssl-cert-snakeoil.key # Server Certificate Chain: # Point SSLCertificateChainFile at a file containing the # concatenation of PEM encoded CA certificates which form the # certificate chain for the server certificate. Alternatively # the referenced file can be the same as SSLCertificateFile # when the CA certificates are directly appended to the server # certificate for convinience. #SSLCertificateChainFile /etc/apache2/ssl.crt/server-ca.crt # Certificate Authority (CA): # Set the CA certificate verification path where to find CA # certificates for client authentication or alternatively one # huge file containing all of them (file must be PEM encoded) # Note: Inside SSLCACertificatePath you need hash symlinks # to point to the certificate files. Use the provided # Makefile to update the hash symlinks after changes. #SSLCACertificatePath /etc/ssl/certs/ #SSLCACertificateFile /etc/apache2/ssl.crt/ca-bundle.crt # Certificate Revocation Lists (CRL): # Set the CA revocation path where to find CA CRLs for client # authentication or alternatively one huge file containing all # of them (file must be PEM encoded) # Note: Inside SSLCARevocationPath you need hash symlinks # to point to the certificate files. Use the provided # Makefile to update the hash symlinks after changes. #SSLCARevocationPath /etc/apache2/ssl.crl/ #SSLCARevocationFile /etc/apache2/ssl.crl/ca-bundle.crl # Client Authentication (Type): # Client certificate verification type and depth. Types are # none, optional, require and optional_no_ca. Depth is a # number which specifies how deeply to verify the certificate # issuer chain before deciding the certificate is not valid. #SSLVerifyClient require #SSLVerifyDepth 10 # Access Control: # With SSLRequire you can do per-directory access control based # on arbitrary complex boolean expressions containing server # variable checks and other lookup directives. The syntax is a # mixture between C and Perl. See the mod_ssl documentation # for more details. #<Location /> #SSLRequire ( %{SSL_CIPHER} !~ m/^(EXP|NULL)/ \ # and %{SSL_CLIENT_S_DN_O} eq "Snake Oil, Ltd." \ # and %{SSL_CLIENT_S_DN_OU} in {"Staff", "CA", "Dev"} \ # and %{TIME_WDAY} >= 1 and %{TIME_WDAY} <= 5 \ # and %{TIME_HOUR} >= 8 and %{TIME_HOUR} <= 20 ) \ # or %{REMOTE_ADDR} =~ m/^192\.76\.162\.[0-9]+$/ #</Location> # SSL Engine Options: # Set various options for the SSL engine. # o FakeBasicAuth: # Translate the client X.509 into a Basic Authorisation. This means that # the standard Auth/DBMAuth methods can be used for access control. The # user name is the `one line' version of the client's X.509 certificate. # Note that no password is obtained from the user. Every entry in the user # file needs this password: `xxj31ZMTZzkVA'. # o ExportCertData: # This exports two additional environment variables: SSL_CLIENT_CERT and # SSL_SERVER_CERT. These contain the PEM-encoded certificates of the # server (always existing) and the client (only existing when client # authentication is used). This can be used to import the certificates # into CGI scripts. # o StdEnvVars: # This exports the standard SSL/TLS related `SSL_*' environment variables. # Per default this exportation is switched off for performance reasons, # because the extraction step is an expensive operation and is usually # useless for serving static content. So one usually enables the # exportation for CGI and SSI requests only. # o StrictRequire: # This denies access when "SSLRequireSSL" or "SSLRequire" applied even # under a "Satisfy any" situation, i.e. when it applies access is denied # and no other module can change it. # o OptRenegotiate: # This enables optimized SSL connection renegotiation handling when SSL # directives are used in per-directory context. #SSLOptions +FakeBasicAuth +ExportCertData +StrictRequire <FilesMatch "\.(cgi|shtml|phtml|php)$"> SSLOptions +StdEnvVars </FilesMatch> <Directory /usr/lib/cgi-bin> SSLOptions +StdEnvVars </Directory> # SSL Protocol Adjustments: # The safe and default but still SSL/TLS standard compliant shutdown # approach is that mod_ssl sends the close notify alert but doesn't wait for # the close notify alert from client. When you need a different shutdown # approach you can use one of the following variables: # o ssl-unclean-shutdown: # This forces an unclean shutdown when the connection is closed, i.e. no # SSL close notify alert is send or allowed to received. This violates # the SSL/TLS standard but is needed for some brain-dead browsers. Use # this when you receive I/O errors because of the standard approach where # mod_ssl sends the close notify alert. # o ssl-accurate-shutdown: # This forces an accurate shutdown when the connection is closed, i.e. a # SSL close notify alert is send and mod_ssl waits for the close notify # alert of the client. This is 100% SSL/TLS standard compliant, but in # practice often causes hanging connections with brain-dead browsers. Use # this only for browsers where you know that their SSL implementation # works correctly. # Notice: Most problems of broken clients are also related to the HTTP # keep-alive facility, so you usually additionally want to disable # keep-alive for those clients, too. Use variable "nokeepalive" for this. # Similarly, one has to force some clients to use HTTP/1.0 to workaround # their broken HTTP/1.1 implementation. Use variables "downgrade-1.0" and # "force-response-1.0" for this. BrowserMatch "MSIE [2-6]" \ nokeepalive ssl-unclean-shutdown \ downgrade-1.0 force-response-1.0 # MSIE 7 and newer should be able to use keepalive BrowserMatch "MSIE [17-9]" ssl-unclean-shutdown httpd.conf File Just a lot of stuff from html5 boiler plate, I will post it if need be Old htaccess file <IfModule mod_rewrite.c> # index.php remove any index.php parts RewriteCond %{THE_REQUEST} /index\.(php|html) RewriteRule (.*)index\.(php|html)(.*)$ /$1$3 [r=301,L] RewriteCond $1 !^(index\.php|assets|robots\.txt|sitemap\.xml|favicon\.ico) RewriteRule ^(.*)/$ /$1 [r=301,L] # codeigniter direct RewriteCond $1 !^(index\.php|assets|robots\.txt|sitemap\.xml|favicon\.ico) RewriteRule ^(.*)$ /index.php/$1 [L] </IfModule> Any Help would be hugely appreciated!!

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  • Install driver and copying files before Installation runs

    - by Kazoom
    I have created installation package for my project, but before or after installation is complete i need to install some drivers and copy some files to target machine, before my software can run. Is it possible for me to do all this action in the MSI installer setup project of visual studio 2005. One option i have explored is using autoITscript, is there a better approach than that? i feel able to do the whole thing in visual studio would be an ideal way? any suggestions? Thanks

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  • Does multiple cpp files correspond to multiple compilation units?

    - by Rahul
    Hello All, Suppose, we have a big Class. and we don't want to break it. In order to maintain code suppose we have created a multiple example1.cpp, example2.cpp, example3.cpp files for single example.h file for class cexample. Does this correspond to multiple compilations units? What is the best approach to handle such big classes? Any suggestions and comments are appreciated. Thank you, RAHUL

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  • UIWebView Page Control

    - by Jack
    Hi, I would like to use a UIWebView to display some files (PDF, PPT, DOC) and would like to have the ability to scroll using external controls (ie a couple of buttons that, when pressed skip back and forward a page) and display the current page in a UITextView. Is this possible? I have no experience with javascript, but a friend of mine has suggested that this might be a useful approach. Is his suggestion valid? JP

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  • Async Call To Services

    - by Pita.O
    Hi Is there any time it would not be a good idea to call web services async? My data layer is a REST-based interface and I thinking of adopting an async-only approach to all the CRUD in the system. Is there anything I should know?

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