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• How can I make a DateTimePicker display an empty string?

  - by brass-kazoo

  I would like to be able to display a DateTimePicker that has a default value of nothing, i.e. no date. For example, I have a start date dtTaskStart and an end date dtTaskEnd for a task, but the end date is not known, and not populated initially. I have specified a custom format of yyyy-MM-dd for both controls. Setting the value to null, or an empty string at runtime causes an error, so how can I accomplish this? I have considered using a checkbox to control the enabling of this field, but there is still the issue of displaying an initial value.. Edit: Arguably a duplicate of the question DateTimePicker Null Value (.NET), but the solution I found for my problem is not a solution for that question, so I think it should remain here for others to find..

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• Vim syntax highlighting: make region only match on one line

  - by sixtyfootersdude

  Hello I have defined a custom file type with these lines: syn region SubSubtitle start=+=+ end=+=+ highlight SubSubtitle ctermbg=black ctermfg=DarkGrey syn region Subtitle start=+==+ end=+==+ highlight Subtitle ctermbg=black ctermfg=DarkMagenta syn region Title start=+===+ end=+===+ highlight Title ctermbg=black ctermfg=yellow syn region MasterTitle start=+====+ end=+====+ highlight MasterTitle cterm=bold term=bold ctermbg=black ctermfg=LightBlue I enclose all of my headings in this kind of document like this: ==== Biggest Heading ==== // this will be bold and light blue ===Sub heading === // this will be yellow bla bla bla // this will be normally formatted However right now when ever I use an equals sign in my code it thinks that it is a title. Is there anyway that I can force a match to be only on one line?

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• NHibernate, the Parallel Framework, and SQL Server

  - by andy

  hey guys, we have a loop that: 1.Loops over several thousand xml files. Altogether we're parsing millions of "user" nodes. 2.In each iteration we parse a "user" xml, do custom deserialization 3.finally, in each iteration, we send our object to nhibernate for saving. We use: .SaveOrUpdateAndFlush(user); This is a lengthy process, and we thought it would be a perfect candidate for testing out the .NET 4.0 Parallel libraries. So we wrapped the loop in a: Parallel.ForEach(); After doing this, we start getting "random" Timeout Exceptions from SQL Server, and finally, after leaving it running all night, OutOfMemory unhandled exceptions. I haven't done deep debugging on this yet, but what do you guys think. Is this simply a limitation of SQL Server, or could it be our NHibernate setup, or what? cheers andy

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• Basic refactoring features (e.g., Rename) unavailable when editing code in an aspx/ascx files

  - by DanM

  I was just editing some C# code between <% %> tags in an .ascx file, and I noticed that the Refactor contextual menu is unavailable. And even if I manually add items from this menu to a custom toolbar, they are disabled when viewing aspx/ascx files. I usually only have small snippets of C# code in my aspx/ascx files, but it would still be nice to be able to perform refactoring operations on any code that exists between <% %> tags. I feel like I'm going back to the dark ages when I have to use find/replace to change the name of a variable. Questions Is there a way to enable Visual Studio's refactoring features while viewing aspx/ascx files in Visual Studio? Are there any Visual Studio plug-ins (preferably free) that offer this kind of functionality?

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• Lucene search taking TOOO long.

  - by Josh Handel

  I;m using Lucene.net (2.9.2.2) on a (currently) 70Gig index.. I can do a fairly complicated search and get all the document IDs back in 1 ~ 2 seconds.. But to actually load up all the hits (about 700 thousand in my test queries) takes 5+ minutes. We aren't using lucene for UI, this is a datastore between processes where we have hundreds of millions of pre-cached data elements, and the part I am working on exports a few specific fields from each found document. (ergo, pagination doesn't make since as this is an export between processes). My question is what is the best way to get all of the documents in a search result? currently I am using a custom collector that does a get on the document (with a MapFieldSelector) as its collecting.. I've also tried iterating through the list after the collector has finished.. but that was even worse. I'm open to ideas :-). Thanks in advance.

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• Filtering by category in Magento 1.4

  - by Sam

  Hi All I have a custom module I made to show featured products on the homepage. I set it up to show products that are in a ‘featured’ category. It works fine in 1.3, but now in 1.4 I get the following error: SQLSTATE[42S22]: Column not found: 1054 Unknown column ‘e.category_ids’ in ‘where clause’ Here’s my code: $_productCollection = Mage::getResourceModel('reports/product_collection') ->addAttributeToSelect('*') ->addAttributeToFilter('visibility', $visibility) ->addAttributeToFilter('category_ids',array('finset'=>$featuredcategory)) $_productCollection->load(); The featured category is specified from the admin. Anyone any ideas what might be up?

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• NHibernate mapping one table on two classes with where selection

  - by Rene Schulte

  We would like to map a single table on two classes with NHibernate. The mapping has to be dynamically depending on the value of a column. Here's a simple example to make it a bit clearer: We have a table called Person with the columns id, Name and Sex. The data from this table should be mapped either on the class Male or on the class Female depending on the value of the column Sex. In Pseudocode: create instance of Male with data from table Person where Person.Sex = 'm'; create instance of Female with data from table Person where Person.Sex = 'f'; The benefit is we have strongly typed domain models and can later avoid switch statements. Is this possible with NHibernate or do we have to map the Person table into a flat Person class first? Then afterwards we would have to use a custom factory method that takes a flat Person instance and returns a Female or Male instance. Would be good if NHibernate (or another library) can handle this.

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• Calling C function from DTrace scripts

  - by dmeister

  DTrace is impressive, powerful tracing system originally from Solaris, but it is ported to FreeBSD and Mac OSX. DTrace uses a high-level language called D not unlike AWK or C. Here is an example: io:::start /pid == $1/ { printf("file %s offset %d size %d block %llu\n", args[2]->fi_pathname, args[2]->fi_offset, args[0]->b_bcount, args[0]->b_blkno); } Using the command line sudo dtrace -q -s <name>.d <pid> all IOs originated from that process are logged. My question is if and how it is possible to call custom C functions from a DTrace script to do advanced operations with that tracing data during the tracing itself.

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• Is there a good charting library for iPhone?

  - by Mike Akers

  I have a need to render and display charts (bar charts for now, but more types may be needed later) in an iPhone app I'm working on. I've done some looking around and it doesn't look like there are any really good, mature charting libraries for iPhone yet. I've also looked for something written for Cocoa on the Mac that can be adapted, but haven't found anything great yet. Anybody dealt with this before? Any recommendations? I did find Core Plot, but it seems to be in the early stages of development. Edit to add some details of requirements (as they currently stand ;) ) Bar Charts Horizontal bar charts Double stacked bar charts Axis labels (including rotated 90 degrees on the y axis) Labels above each bar on the chart Shaded or custom backgrounds

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• Link to audio in XHTML/EPUB

  - by wxs

  I'm looking into synchronizing an ebook in epub format (so the content is in XHTML) to an audio file. I'm thinking of putting something along the lines of: <a class="audiolink" href="sound.ogg?t=1093"></a> into the body of the document, and then have a custom epub reader that recognizes those tags and synchronizes the audio accordingly. That does seem like a bit of a hack to me though, especially the use of a special class name. Does anyone have any pointers to how this may be done in a more standards-compliant manner (or somewhere where it has been done before)? Ebooks with audio annotation seem like an idea that may already be out there.

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• Mootools not loading fast enough IE6

  - by Tom

  Very random and annoying problem with IE6. We keep our common JS files on a resources server so we only have to update them in one place. As well as our custom classes we also keep our build of mootools and more on the resources server and link to it in the head of our sites. This is fine in all the browsers accept IE6. In IE6 it seems to not loads the core quick enough from the external link before trying to process the mootools code in my site.js file. It will go wrong on the first line "windows.addEvent". If i put a mootools core in a folder where the site is though its fine. Does anyone know why it might be doing this and if so a way around it, but still keeping the files on the resources domain? Thanks Tom

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• Drawbacks to using background-repeat only for colors?

  - by ineedtosleep

  So I need some custom colors on a layout, but I'm looking for a better way of doing it other than just slapping a giant picture with (background: url(something.jpg)) in the layout. Mostly I'm thinking of getting a color palette (i.e. from Adobe Kuler, colourlovers, etc.), getting a 5x5 sample of each color and sticking them in an array for CSS sprites or just as separate files and accessing them through: .color-one {transparent url(./one.gif) repeat} and just reusing that whenever I'd like to use the color. Are there any drawbacks to doing it this way? And if there are should I just stick with web-safe colors or is there a better way of doing this?

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• Annotation Title/Subtitle under Pins

  - by ludo

  Hi, I use the Map to display some pin location from my database, everything is working fine. After that I use a pickerView to let the user display some specific pins. So I remove all the Pins first with [mapView removeAnnotations:mapView.anotations]; and display new Pins. There is like 100 of news pins, my problem is when I click on a Pin, the Title and subtitle are display under the others pins. Someone got the same problem? Thanks, P.S: Don't know if its relevant but I add a custom image for the pins.

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• API access to a manually-created Google Map

  - by rutherford

  I have a number of public custom Google Maps created via http://maps.google.com/ - obviously associated with my google account. Can I access these maps via the Google Maps javascript api? The api doesn't appear to work with the manually created maps located on maps.google.com from what I can tell? And if not, is there another way to store overlay data (markers, etc) that the javascript api can grab and load into the map on the client's browser? Am thinking a service like dabbleDB, except that I don't think they offer write access via javascript (this would be necessary for the user adding markers to the map, for example) Obviously I could create a db layer on my server, but am looking for a 'cloud' solution that removes the strain from my databases!!

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• What's the simplest way to ask for user input through Modal in Win Form

  - by Refracted Paladin

  What is the simplest way to implement a Modal(popup) MessageBox that allows a custom value to be entered and returned. In my case, a String. Maybe I am over thinking this but I figured I'd ask. I plan to just create a new Form. Add a label, a textbox, two buttons. Assign the textbox to a property and from my main form call a ShowDialog() on it. Will I be able to still access the property that way or should I somehow return the value? Is this a decent way of doing this?

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• jQuery Validation Engine with Mime

  - by Diego Pucci

  I have this custom rule with tje jQuery validation Engine: "validateMIME": { "func": function(field, rules, i, options){ var fileInput = field[0].files[0]; var MimeFilter = new RegExp(rules[3],'i'); if (fileInput) { return MimeFilter.test(fileInput.type); } else { return true;} }, "alertText": "* Estensione non supportata" }, The problem is that this is working ONLY if the field is required. But in my case the field is not required, but if filled then the Mime type needs to be checked. How do I edit this function to work with non required fields? what's wrong with it? Thanks

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• Django as S3 proxy

  - by schneck

  Hi there, I extended a ModelAdmin with a custom field "Download file", which is a link to a URL in my Django project, like: http://www.myproject.com/downloads/1 There, I want to serve a file which is stored in a S3-bucket. The files in the bucket are not public readable, and the user may not have direct access to it. Now I want to avoid that the file has to be loaded in the server memory (these are multi-gb-files) avoid to have temp files on the server The ideal solution would be to let django act as a proxy that streams S3-chunks directly to the user. I use boto, but did not find a possibility to stream the chunks. Any ideas? Thanks.

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• ASP.NET MVC authorization & permission to use model classes

  - by Tomek

  Hi, This is my first post here, so hello :) Okey, let's get to the point... I am writing my first app in ASP.NET MVC Framework and i have a problem with checking privileges to use instances of model classes (read, edit). Sample code looks like this: // Controller action [CustomAuthorize(Roles="Editor, Admin")] public ActionResult Stats(int id) { User user = userRepository.GetUser(id); if (user == null || !user.Activated || user.Removed) return View("NotFound"); else if (!user.IsCurrentSessionUserOwned) return View("NotAuthorized"); return View(user); } So far authorize attribute protects only controller actions, so my question is: how to make (custom) authorize attribute to check not only user role, usernames but also did i.e. resources instantiated in action methods (above: User class, but there are other ORM objects like News, Photos etc.) All of these object to check have their unique ID's, so user have own ID, News have their ID and UserID field referecned to Users table (i mean these objects are LINQ2SQL classes). How should i resolve that problem?

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• Problem with signals and slots

  - by Jen

  I am creating a class with custom slots in Qt: class CustomEdit : public QTextEdit { Q_OBJECT public: CustomEdit(QWidget* parent); public slots: void onTextChanged (); }; However, I'm getting thise linker error: undefined reference to 'vtable for CustomEdit' The documentation says: if you get compiler errors along the lines of "undefined reference to vtable for LcdNumber", you have probably forgotten to run the moc or to include the moc output in the link command. ... but it is not obvious what that means. Is there something I need to add to my class, or to the .pro file?

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• Why is it preferable to call a static method statically from within an instance of the method's clas

  - by javanix

  If I create an instance of a class in Java, why is it preferable to call a static method of that same class statically, rather than using this.method()? I get a warning from Eclipse when I try to call static method staticMethod() from within the custom class's constructor via this.staticMethod(). public MyClass() { this.staticMethod(); } vs public MyClass() { MyClass.staticMethod(); } Can anyone explain why this is a bad thing to do? It seems to me like the compiler should already have allocated an instance of the object, so statically allocating memory would be unneeded overhead.

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• Cropping an image, saving output to a new file and get crop coordinates

  - by synic

  I'm interfacing with a service that allows you to upload an image, and also upload coordinates of a thumbnail of that image. I'm thinking that (if there isn't some sort of prefab Activity specifically for this) that I can use Android's crop utility. The only problem is that I can't overwrite the original file, the crop window needs to have a custom message (instead of "crop image"), and I'll need the coordinates of the crop. Is this possible? Is there another way to do this without writing my own Activity?

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• insertNewObjectForEntityForName: inManagedObjectContext: returning NSNumber bug?

  - by beinstein

  I'm relatively well versed in CoreData and have been using it for several years with little or no difficulty. All of a sudden I'm now dumbfounded by an error. For the life of me, I can't figure out why insertNewObjectForEntityForName:inManagedObjectContext: is all of a sudden returning some sort of strange instance of NSNumber. GDB says the returned object is of the correct custom subclass of NSManagedObject, but when I go to print a description of the NSManagedObject itself, I get the following error: *** -[NSCFNumber objectID]: unrecognized selector sent to instance 0x3f26f50 What's even stranger, is that I'm able to set some relationships and attributes using setValue:forKey: and all is good. But when I try to set once specific relationship, I get this error: *** -[NSCFNumber entity]: unrecognized selector sent to instance 0x3f26f50 Has anyone ever encountered anything like this before? I've tried clean all targets, restarting everything, even changing the model to the relationship in question is a to-one instead of a to-many. Nothing makes any difference.

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• how to run phantomjs on heroku?

  - by mathieurip

  I am trying to run phantomjs on the heroku cedar stack. I am using a phantomjs buildpack for heroku https://github.com/stomita/heroku-buildpack-phantomjs. However I followed the instructions but still cannot make it work. When I run the command heroku run bash and type phantomjs --version it says phantomjs: command not found I read things about LD_LIBRARY_PATH that needs to be set to "/usr/local/lib:/usr/lib:/lib:/app/vendor/phantomjs/lib", this is what i did but without success. Is there something that i am missing ? Where does the buildpack install the phantomjs binary exactly ? Is there a way to know the path where the binary is ? I am using ruby 1.9.2 Thanks a lot for your help. EDIT: To be more precise, i want to combine ruby and phantomjs, so i am using this custom buildpack: https://github.com/ddollar/heroku-buildpack-multi, but when i push to heroku i get "Heroku push rejected, failed to compile Multipack app"

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• jqGrid formatter and sortable column - doesn't sort

  - by HeavyWave

  I am using a custom formatter for my jqGrid columnModel and I can't get sorting to work with formatter functions. If I remove formatter column sorts normally. colModel: [ { name: 'status', index: 'status', width: 18, sorttype: 'int', align: 'center', formatter: function(cellvalue, options, rowObject) { return cellvalue == 1 ? "<img src='images/agent_green_s.png' alt='Ready' title='Ready' />" : cellvalue == 3 ? "<img src='images/agent_red_s.png' alt='Busy' title='Busy' />" : "<img src='images/agent_orange_s.png' alt='Pending Ready' title='Pending Ready' />"; } How do I get sorting to work properly?

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• Adding STI to Existing Table...

  - by keruilin

  I want to add STI to an existing table using a custom type column. Let's call this taste_type whose corresponding model is Fruit. In the Fruit model I have: set_inheritance_column :taste_type In my migration to add STI I have: class AddSTI < ActiveRecord::Migration def self.up add_column :fruits, :taste_type, :string, :limit => 100, :null => false Fruit.reset_column_information Fruit.find_by_id(1).update_attributes({:taste_type => 'Sour'}) end def self.down remove_column :fruits, :taste_type end end When I run the migration, I get the following error: Mysql::Error: Column 'taste_type' cannot be null: ... Any idea what's going? I can get the migration to run if I comment the set_inheritance_column in the Fruit model, then uncomment it after I run the migration. Obviously, I don't want to do this, however.

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