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• Is Lightweight Code Generation (LCG) dead?

  - by Greg Beech

  In the .NET 2.0-3.5 frameworks, LCG (aka the DynamicMethod class) was a decent way to emit lightweight methods at runtime when no class structure was needed to support them. In .NET 4.0, expression trees now support statements and blocks, and as such appear to provide sufficient functionality to build just about any functionality you could require from such a method, and can be constructed in a much easier and safer way than directly emitting CIL op-codes. (This statement is borne from today's experimentation of converting some of our most complex LCG code to use expression tree building and compilation instead.) So is there any reason why one would use LCG in any new code? Is there anything it can do that expression trees cannot? Or is it now a 'dead' piece of functionality?

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• Store time of the day in SQL

  - by nute

  How would you store a time or time range in SQL? It won't be a datetime because it will just be let's say 4:30PM (not, January 3rd, 4:30pm). Those would be weekly, or daily meetings. The type of queries that I need are of course be for display, but also later will include complex queries such as avoiding conflicts in schedule. I'd rather pick the best datatype for that now. I'm using MS SQL Server Express 2005. Thanks! Nathan

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• Should I create subclass NSManagedObject or not?

  - by TP

  Hi, I have spent a few days learning and writing NSCoding and finally got it working. However, it took very long to archive and unarchive the (quite complex) object graph, which is unacceptable. After searching the internet for some time, I think the better way is to use core data. Do you recommend that 1) I should rewrite all my classes as subclasses of NSManagedObject or 2) should I create an instance variable of NSManagedObject in each of my class so that any changes to the class also updates its core data representation? Doing either way will need significant changes to the exiting classes and I think I have to update lots of unit test cases as well if it changes the way the classes are initialized. What do you recommend? I really don't want to head to the wrong approach again... Thanks!

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• Hibernate Criteria: Return different entity type than rooted entity?

  - by Gilean

  I have entities similar to: ProductLine: id, name ProductLineContents: content_id, product_line_id Content: id, text, updated_time What I'd like to do is: for each product line, get the latest content (so if theres two content entries associated to one product line, the latest updated_time is rturned, and if one content item is associated to two product lines, it is returned twice). Something similar to: select content.* from productline inner join productlinecontents inner join content; However I can't seem to figure out how to have Hibernate Criteria return a different entity than the original one it was created with. So if I wanted to start the criteria at the product line with createCriteria(ProductLine.class) along with the proper joins, then it only returns ProductLine objects, but I need Content objects. What's the best way to accomplish this? The actual data model is much more complex and can't be modified

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• Forcing positive sign on double in .Net String.Format

  - by Max Yaffe

  Context: .Net, C# I want to print a complex number made from two doubles. The sign needs to show on the imaginary part. I'd like to use the default double formatting for each part to minimize the number of characters. I tried using String.Format("{0:+G;-G}{1:+G;-G}j", real, imaginary) but this ended up printing: "+G-Gj". Not quite what I wanted. Is there any way to do this using the G specifier or do I need to do a custom format which would sacrifice auto-switching the exponent, e.g. {1:+#.######e###;-#.######e###}j"

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• Translate imperative control flow with break-s/continue-s to haskell

  - by dorserg

  Consider the following imperative code which finds the largest palindrome among products of 3-digit numbers (yes, it's the one of the first tasks from "Project of [outstanding mathematician of 18th century]" site): curmax = 0 for i in range(999,100): for j in range(999,100): if ((i*j) < curmax): break if (pal(i*j)): curmax = i*j break print curmax As I'm learning Haskell currently, my question is, how do you translate this (and basically any imperative construct that contains something more complex than just plain iteration, e.g. breaks, continues, temporary variables and all this) to Haskell? My version is maxpal i curmax | i < 100 = curmax | otherwise = maxpal (i-1) (innerloop 999) where innerloop j | (j < 100) || (p < curmax) = curmax | pal p = p | otherwise = innerloop (j-1) where p = i*j main = print $ maxpal 999 0 but this looks like we're still in imperative uglytown. So what could you advise, what are the approaches of dealing with such cases FP-style?

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• How to automate testing of a browser-based app?

  - by mawg

  If it were a windows program, I would use Auto it to automate testing. Is there something similar for browser-based apps? Nothing too complex, it should just allow scripting (preferable for me to macro-recording) to simulate human interaction with the browser, which means being able to identify fields of a form by name, inject text into some, simulate mouse-click on others, etc and then, after submitting a form, should be able to read text certain named controls, check the status of others (checked, radio group index, read-only, etc). While I do appreciate a full featured product, I don't appreciate a steep learning curve. so something as simple as the scripting of Auto It woudl be fine. I don't know if it makes a difference which browser is used, but I could live with MSIE 6 or higher (maybe 7 or higher at a push).

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• WYSIWYG text editor in Java

  - by Aaron Digulla

  I'd like to collect all WYSIWYG text editors for Java here. Some rules for entries: There must be a link to the project/product You must state whether it's open source or commercial Is it possible to extend the editor (add new features like a "violet centered sudoku")? Is that simple or complex? Does it come with lots of features (fancy character and paragraph styles with online spell checking for several languages in the same document) or just the basics (bold, italics, no underline)? List important dependencies (does it run on bare Java with Swing? SWT? MacOS?) Your personal opinion This list should help developers determine which editor to choose. I'm not looking for "the best" but more "what's there".

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• A linq join combined with a regex

  - by Geert Beckx

  Is it possible to combine these 2 queries or would this make my code too complex? Also I think there should be a performance gain by combining these queries since I think in the near future my source table could be over 11000 records. This is what i came up with so far : Dim lit As LiteralControl ' check characters not in alphabet Dim r As New Regex("^[^a-zA-Z]+") Dim query = From o In source.ToTable _ Where r.IsMatch(o.Field(Of String)("nam")) lit = New LiteralControl(String.Format("letter: {0}, count: {1}<br />", "0-9", query.Count)) plhAlpabetLinks.Controls.Add(lit) Dim q = From l In "ABCDEFGHIJKLMNOPQRSTUVWXYZ".ToLower.ToCharArray _ Group Join o In source.ToTable _ On l Equals o.Field(Of String)("nam").ToLowerInvariant(0) Into g = Group _ Select l, g.Count ' iterate the alphabet to generate all the links. For Each letter In q.AsEnumerable lit = New LiteralControl(String.Format("letter: {0}, count: {1}<br />", letter.l, letter.Count)) plhAlpabetLinks.Controls.Add(lit) Next Kind regards, G.

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• Best practice for partial updates in a RESTful service

  - by magiconair

  I am writing a RESTful service for a customer management system and I am trying to find the best practice for updating records partially. For example, I want the caller to be able to read the full record with a GET request. But for updating it only certain operations on the record are allowed, like change the status from ENABLED to DISABLED. (I have more complex scenarios than this) I don't want the caller to submit the entire record with just the updated field for security reasons (it also feels like overkill). Is there a recommended way of constructing the URIs? Do I use GET, POST, PUT or is there no agreed way of doing these kind of things? When reading the REST books RPC style calls seem to be frowned upon. Thanks Frank

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• How to pass associative Array parameter from javascript to ActiveX object?

  - by Rory

  I'd like to pass an associative array (or simply an object with property names & values) to my ActiveXObject. I can't find anyone who has successfully and simply passed complex data from javascript to an ActiveX object. My ActiveX object is being loaded in IE, and it's mine so I can change the method signature & code to whatever will work. I also have control over the structure of the javascript. Without a simple way of doing this I'm thinking of url-encoding the data and sending it as a string. But that does seem a little silly if it's possible just to pass an object. The ActiveX object is coded in C# if that makes any difference...

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• Returning from method inside a @synchronized block

  - by Michael Waterfall

  I'd just like to know if it's advised to return from a method within a @synchronized block? For example: - (id)test { @synchronized(self) { if (a) return @"A"; else return @"B"; } } As opposed to: - (id)test { NSString *value; @synchronized(self) { if (a) value = @"A"; else value = @"B"; } return value; } This sample is rather simplistic, but sometimes in a complex method it would make things simpler to be able to return from within a @synchronized block.

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• Passing objects by reference or not in C#

  - by Piku

  Suppose I have a class like this: public class ThingManager { List<SomeClass> ItemList; public void AddToList (SomeClass Item) { ItemList.Add(Item); } public void ProcessListItems() { // go through list one item at a time, get item from list, // modify item according to class' purpose } } Assume "SomeClass" is a fairly large class containing methods and members that are quite complex (List<s and arrays, for example) and that there may be a large quantity of them, so not copying vast amounts of data around the program is important. Should the "AddToList" method have "ref" in it or not? And why? It's like trying to learn pointers in C all over again ;-) (which is probably why I am getting confused, I'm trying to relate these to pointers. In C it'd be "SomeClass *Item" and a list of "SomeClass *" variables)

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• How can I make the Rails 3 router localize URLs using localization files?

  - by edgerunner

  What I'd like to be able to do is: in config/routes.rb resources :posts in config/locale/en.yml en: resources: posts: "posts" new: "new" edit: "edit" in config/locale/tr.yml tr: resources: posts: "yazilar" new: "yeni" edit: "duzenle" and get I18n.locale = :en edit_post_path(3) #=> /posts/3/edit I18n.locale = :tr edit_post_path(3) #=> /yazilar/3/duzenle I'd also like Rails to match any of these routes anytime and pass the associated locale in the params hash such that when I navigate to /yazilar , the request should be routed to the posts#index action with the :tr locale in the params hash. Any simple or complex way of doing that?

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• parser the xml and build a ui for user

  - by hguser

  Hi: Now I have to handle some xml in my java swing application. I have to build a swing ui according to the special schema ,then user can fill some values.After user completed,I will collect the information,validate the value and then build a xml file. For building xml file I can use the xmlbeans,however how to parse the schema and build a swing ui? Since the schema is rather complex. A schema can be found here: example schema I have to parser this schema,for the LiteralInputType ,a JTextArea should be built. However there are other types "complexType" and etc.. These types may not occur at the sametime. Some times only the LiteralInputType is needed,somethimes the ComplexType is needed,also maybe all of them are needed. So, how to implement it? Anyone can help me?

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• MVVM and division of amongst multiple developers

  - by nlawalker

  Can anyone speak to the ease of dividing work amongst multiple developers when designing and building a medium- to large-complexity Silverlight or WPF application? My team is finding it difficult to cleanly split work when you've got, for example, a number of controls that provide different visualizations of a Model/ViewModel that's fairly complex and has a lot of properties and methods for interacting with data. It seems like a very big portion of the work ends up being the design and build of the Model/ViewModel, and much less inside each of the controls, which are naturally what are easy to ration out to multiple people.

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• How can I consume a WSDL (SOAP) web service in Python?

  - by DavidM

  I want to use a WSDL SOAP based web service in Python. I have looked at the Dive Into Python code but the SOAPpy module does not work under Python 2.5. I have tried using suds which works partly, but breaks with certain types (suds.TypeNotFound: Type not found: 'item'). I have also looked at Client but this does not appear to support WSDL. And I have looked at ZSI but it looks very complex. Does anyone have any sample code for it? The WSDL is https://ws.pingdom.com/soap/PingdomAPI.wsdl and works fine with the PHP 5 SOAP client.

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• C#: Why only integral enums?

  - by JamesBrownIsDead

  I've been writing C# for seven years now, and I keep wondering, why do enums have to be of an integral type? Wouldn't it be nice to do something like: enum ErrorMessage { NotFound: "Could not find", BadRequest: "Malformed request" } Is this a language design choice, or are there fundamental incompatibilities on a compiler, CLR, or IL level? Do other languages have enums with string or complex (i.e. object) types? What languages? (I'm aware of workarounds; my question is, why are they needed?) EDIT: "workarounds" = attributes or static classes with consts :)

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• What is wrong with my Basic Authentication in FireFox?

  - by Pure.Krome

  Hi folks, i'm trying to goto the following url :- http://user1:pass1@localhost:1234/api/users?format=xml nothing to complex. Notice how i've got the username/password in the url? this, i believe, is for basic authentication. When i do that, the Request Headers are MISSING the 'Authorize' header. Er... that's not right :( I have anonymous authentication only setup on the site. I don't want to have anon off and basic turned on .. because not all of the site requires basic.. only a few action methods. So .. why is this not working? Is this something to do with the fact my code is not sending a 401 challenge or some crap? For What It's Worth, my site is ASP.NET MVC1 running on IIS7 (and the same thing happens when i run it on cassini).

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• How does one SELECT block another?

  - by Krip

  I'm looking at output of SP_WhoIsActive on SQL Server 2005, and it's telling me one session is blocking another - fine. However they both are running a SELECT. How does one SELECT block another? Shouldn't they both be acquiring shared locks (which are compatible with one another)? Some more details: Neither session has an open transaction count - so they are stand-alone. The queries join a view with a table. They are complex queries which join lots of tables and results in 10,000 or so reads. Any insight much appreciated.

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• What's the best technology for a medium complexity web application?

  - by naveed

  I'm planning to work on a web application of reasonable complexity and am wondering what technology to go with. It will probably start with one person, but there will be 2 or 3 more eventually. My first requirement is to be able to do this as quickly as possible - preferably with as less code as possible. Secondly requirement is that it should be able to scale easily. I have worked with .NET and PHP. So, I am thinking about ASP .NET MVC or CakePHP. It appears to me that CakePHP might be quicker. I did look at Ruby on Rails, but the learning curve is a little steep (which is not an issue if I can be convinced that this is the best tool for the task), I'm not too crazy about the huge number of files generated and I have heard about scalability issues as well as it's applicability to complex situations. I look forward to your opinions on your favorite technology and why.

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• iPhone SDK: My server doesn't support range header requests, does that mean it's impossible for me t

  - by Jessica

  I am currently developing an iPhone app, in which involves downloads of up to 300 mb. I have been told by my hosting service that my server does not support range header requests. However, when I download a file from my server using a download client, like safari download manager, resume options are available and work. Does this mean that they have a work around for servers that don't support range header requests and that I could possibly implement into my iPhone app? Or are they using a technique too complex to implement into the iPhone. If you know of a technique code samples will be greatly appreciated.

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• Top x rows and group by (again)

  - by Tibor Szasz

  Hello, I know it's a frequent question but I just can't figure it out and the examples I found didn't helped. What I learned, the best strategy is to try to find the top and bottom values of the top range and then select the rest, but implementing is a bit tricky. Example table: id | title | group_id | votes I'd like to get the top 3 voted rows from the table, for each group. I'm expecting this result: 91 | hello1 | 1 | 10 28 | hello2 | 1 | 9 73 | hello3 | 1 | 8 84 | hello4 | 2 | 456 58 | hello5 | 2 | 11 56 | hello6 | 2 | 0 17 | hello7 | 3 | 50 78 | hello8 | 3 | 9 99 | hello9 | 3 | 1 I've fond complex queries and examples, but they didn't really helped.

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• Breaking the SQL Compact 8K Limit?

  - by David Veeneman

  I am creating a desktop application that stores rich text documents to a SQL Compact database. Documents are converted to a byte array and stored as a Binary column, and I am running into SQL Compact's 8K limit for Binary field length. Is there a simple way to get around the 8K limit? I can come up with lots of complicated ways to do it, such as parsing into 8K chunks for storage and reassembling on fetch. But before I get into something that complex, I would like to make sure I can't solve the problem more simply, such as by changing data type. If there is no simple way of getting around the 8K limit, is thare a best practice for storing documents greater than 8K? Thanks for your help.

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• Best practice to pass a value from pop up control on iPad.

  - by Tattat

  It is an iPad app based on SDK 3.2. I have a MainUIView, that is subclass from UIView, it have a UIButton and a UILabel. When user press the UIButton, the pop up control will be appeared with a table view. When the user select a cell from the table view, the UILabel changes content base on the user click, and the pop up table view will disappear. The question is, how can I pass the "selected cell" to the UILabel. I am thinking making a "middle man" object. When the user click the UIButton, and the "middle man" will pass to the table. When the cell is selected, the "middle man" will store the idx, and call the UILabel change content from the value of "middle man". But I think it is pretty complex to implement, is there any easier way to implement it? thz u.

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