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• Difference between Expression<Func<>> and Func<>

  - by Sir Psycho

  As an example, why do most LINQ operators accept Expression<Func<TSource>> and it's equivalent Func<TSource> What's the benefit/reason for using the generic Expression class instead of straight up lamda syntax?

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• How do I program hardware?

  - by Arlen Beiler

  What would I need to program a piece of hardware to do something for me? Let's say I have something with 15 relays (or equivalent) and I want to tell it to turn off relay 10. Or better yet, when sensor 10 is activated, toggle relay 10.

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• How do I compete the transformation matrix needed to transform a rectangle into a trapezium?

  - by Rich Bradshaw

  I'm playing around with css transforms and the equivalent filters in IE, and want to simulate perspective by transforming a 2d rectangle into a trapezium. Specifically, I want the right hand side of the rectangle to stay the same height, and the left hand side to be say 80% of the height, so that the mid points of both sides are horizontally in line with each other. I'm familiar with matrix algebra, but can't think how to determine what matrix will do that.

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• How do I make and use a Queue in Objective-C?

  - by MrDatabase

  I want to use a queue data structure in my Objective-C program. In C++ I'd use the STL queue. What is the equivalent data structure in Objective-C? How do I push/pop items?

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• Why doesn't Apple make private APIs inaccessible?

  - by Howiecamp

  If Apple doesn't want developers using private APIs in the iPhone SDK, why don't they do something like mark the classes and/or methods with whatever the Objective-C equivalent of C#'s "internal" keyword? If the APIs are spread amongst multiple binaries, Apple could refactor them into dedicated private-API-only binaries to make this easier for them.

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• Is there a Railscasts for Django?

  - by J McConnell

  I learned everything I know about Rails from Railscasts. Now I want to learn Django but I'm not finding any comprehensive tutorial resources like Railscasts. Does an equivalent not exist in the Django world? If so, is that because there is less to learn?

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• What's what awk can't that sed can?

  - by LarsOn

  Or just a matter of choice and call awk and sed equivalent towards usage. They both do the common search replace seemingly identically regarding i/o.

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• Submitting a Chinese character to my form.

  - by Subrat

  I am submitting a Chinese character to my form but once it is submitted it is coming as Unicode character. For e.g. I am entering this ‘??’ and the value going to my form is ‘星洲’ Any inputs how to convert this Unicode to the Chinese character equivalent.

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• VB.NET/C# Comparison Operator for to test for set membership - like the IN Operator for SQL...

  - by Albert

  so in SQL you can do something like: WHERE title IN('title1','title2','title3') to test for set membership. how can I do this in VB.NET/C#.NET? Example: IF textMyTitle.text IN ("title1","title2","title 3") THEN 'Take Action End If Obviously the IN part of that statement doesn't work...whats the logical equivalent in .NET?

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• How do you get the User's IP Address in Castle MVC (Monorail)?

  - by Brenton Alker

  In a controller action of a CastleMVC application, how can I get the user's IP Address? I think in asp.net mvc it would be Request.ServerVariables["REMOTE_ADDR"], but I can't find an equivalent in Castle. (I am aware of potential proxy issue's etc, the address that is reported in the request is fine)

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• Selectively Redirecting HTTP requests to HTTPS requests in ASP.NET

  - by plaureano

  What's the simplest and most effective way to selectively redirect HTTP requests to your ASP.NET page to its HTTPS equivalent? For example, if my page site URL is http://www.somesite.com, I want to redirect some (or all) page requests to https://www.somesite.com. What's the easiest way to do that?

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• Enable RFC1323 on a per socket basis in Windows?

  - by Sheado

  Howdy.. Anybody know if it's possible to enable RFC1323 on a per TCP socket basis in windows? I know it can be changed system wide via the registry ( http://www.psc.edu/networking/projects/tcptune/OStune/winxp/winxp_stepbystep.html ) Also, it seems like this is possible *nix via: int on=1; setsockopt(s,IPPROTO_TCP,TCP_RFC1323,&on,sizeof(on)); Is there a Windows equivalent? Thanky much!

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• Theming the default search results page in Drupal

  - by David Pratt

  I'm trying to customise the mark-up of the default search results page in Drupal 6. Specifically I'd like to remove the search box and the title from the page - I know I can hide it with CSS, but I'd rather it wasn't rendered in the first place. Ideally, in the same why that you theme a particular content type node by copying the node.tpl.php and renaming it to something like node-blog.tpl.php and then amending the mark-up accordingly - is there an equivalent way to do this for the search results page?

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• continue to <label> in C# like in java

  - by senzacionale

  I need C# equivalent to Java’s continue ? i have for (String b : bar) { <label> try { } catch (EndpointNotFoundException ex) { continue <label> } } how can i simulate this in C#. i need that when i get exception that i repeat code not go on.

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• How do you do a limit query in HQL

  - by stevedbrown

  In Hibernate 3, is there a way to do the equivalent of the following MySql limit in HQL. select * from a_table order by a_table_column desc limit 0, 20; I don't want to use setMaxResults if possible. This definitely was possible in the older version of Hibernate/HQL, but seems to have disappeared.

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• What tech needed to run JSP and Servlets?

  - by Mike

  If I want to build a site with PHP, all I have to do is install the PHP package and make sure mod_php is enabled in my apache web server. Voila! a PHP environment. Now, if I want to build a site with equivalent Java tech, i.e. JSP and Servlets, What do I have to install?

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• Scheme define/lambda shorthand

  - by incrediman

  In Scheme, how can I make use of the define/lambda shorthand for nested lambda expressions within my define? For example given the following procedure... (define add (lambda (num1 num2) (+ num1 num2))) One can shorten it to this: (define (add num1 num2) (+ num1 num2)) However, how can I shorten the following function similarly ? (define makeOperator (lambda (operator) (lambda (num1 num2) (operator num1 num2)))) ;example useage - equivalent to (* 3 4): ((makeOperator *) 3 4)

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• New to Android - Drawing a view at runtime

  - by Brian515

  HI all, I'm just getting started with developing for Android. I'm looking to port one of my iPhone applications, but I'm kind of at a loss for how to draw a view at runtime (a view not declared in the XML). Basically, I want to draw a simple rectangle, but then be able to manipulate its frame after being drawn. Sorry if this is a really, really simple question, but I can't seem to find some equivalent to the iPhone SDK here. Thanks in advance!

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• Can I send a ctrl-C (SIGINT) to an application on Windows?

  - by Matthew Murdoch

  I have (in the past) written cross-platform (Windows/Unix) applications which, when started from the command line, handled a user-typed Ctrl-C combination in the same way (i.e. to terminate the application cleanly). Is it possible on Windows to send a Ctrl-C/SIGINT/equivalent to a process from another (unrelated) process to request that it terminate cleanly (giving it an opportunity to tidy up resources etc.)?

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• How to change HEX value to EBCDIC char

  - by vininet

  What is the simplest way to convert HEX value to ebcdic char type in Java e.g. The example below will return at sign but I would like to get ebcidic equivalent i.e. space char.. String hex = "40"; char c = (char) Integer.parseInt(hex, 16);

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• Are column families within a single keyspace related in any way?

  - by taw

  What's the difference between having keyspace Foo and column families A and B in it vs. having two keyspaces FooA and FooB with one column family in each? API make it look as if these two were pretty much equivalent. As a bonus question, how do supercolumns fit into this picture?

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• iteratively creating graphs

  - by Andrei

  I have a bunch of files containing x and y coordinates, representing time and value (space-separated, but can be amended) For example: 15:06:59 0.0140 ....... I want to create a word file (or some equivalent) to show all these graphs. Right now I am using Excel. It pretty daunting task, as I ahve to plug paste numbers in two rows for each graph, and I have many of them. Thanks

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• Is there a way to link the unversioned directory created by svn export to its branch in SVN?

  - by ecrane

  I have a copy of the contents of an svn branch locally without any .svn folders. The equivalent of the output of an svn export of that branch. I'd like to link up this directory to its corresponding branch in version control, without having to do an svn checkout followed by manually merging my changes in. Is there some way to do this easily?

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• Make Visual Studios "Add Service Reference" Feature use an existing Class

  - by gencha

  When I add a service reference to my Visual Studio 2010 C# project, a new class for one of the types defined in the WSDL will be generated. A de-facto equivalent definition of that type already exists in our solution in a different assembly. When adding the SoapTypeAttribute to the existing class and replacing the references to the generated class in the generated code, everything runs perfectly and as expected. How would I tell Visual Studio to use the existing class in the generated code?

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• Support for encoding query string or POST data in YUI ?

  - by faB

  How do you encode a javascript object/hash (pairs of properties and values) into a URL-encoded query string with YUI (2.7.0 or 3.0.0 Beta) ? I want to do the equivalent of Object.toQueryString() from Prototype: I need this to encode parameters for GET and POST requests with YAHOO.util.Connect. It turns out YAHOO.util.Connect has a setForm() method to serialize a form but that still leaves me out cold to encode parameters for GET requests, or the 4th parameter of YAHOO.util.Connect.asyncRequest() to pass post data.

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