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• WPF MVVM Property Change Animation

  - by cjibo

  I am looking for a clean way to start an animation that will have dynamic values. Basically I want to do an animation where an element changes width based on the data of another element. Say I have a TextBlock that's Text Property is Binding. When this property changes I want a visual element say a Rectangle for our sake to do a DoubleAnimation changing the width from previous value to the new value. I am trying to stay away from putting code in my view if possible. I've looked into DataTriggers but they seem to require that you know what the value would be such as an Enum. In my case it is just the value changing that needs to trigger a storyboard and the animation would need to start at the current(previous) value and move nicely to the new value. Any ideas. Maybe I just missed a property.

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• "Compiling" content with short tags to var, without eval()

  - by Spot

  To start off, let me clear the air by saying we are aware of the dis/advantages to using short tag syntax in PHP. That is not what this question is about. Is there a way to "include" a file containing short tag code, into a variable, and have PHP actually parse the code? include/require obviously do not provide the data in a workable form, and output buffering does not parse the short tag code because it happens at runtime. Using eval() is simply not an option. Suggestions?

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• Storing the HTML output from a local PHP file into a string using file_get_contents

  - by bobo

  There is a header.php file and it contains some php codes that return HTML. I know I can use require, include to echo the results, but what I want to do is to store its processed output string into a variable. In a page, I used: $headerHTML=file_get_contents('header.php'); Then I got the PHP code output rather than the processed HTML output. I know adding http:// would help. But I prefer to keep using relative path, how can I tell the function to treat the php file correctly?

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• Time to ignore IE?

  - by Delan Azabani

  In this answer: http://stackoverflow.com/questions/2781013/does-anyone-have-a-easy-to-use-png-fix-for-ie/2781041#2781041 which got voted down considerably, I point out the need to ignore Internet Explorer, or at least its old version 6, for the following reasons: It is hard to hack for, and some features don't exist at all The more you hack for IE, the longer people blindly use it (vicious cycle) My website, azabani.com, doesn't hack for IE at all. The layout looks somewhat broken in the browser, and most of my projects require features not present in IE's codebase. I would like to know if you support my view, or if you share views with those who downvoted my answer.

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• Filtering foreign keys with AJAX in Django admin

  - by cnobile

  I have most of this figured out already. I have AJAX returning the region/state/province when a country is selected. The correct foreign key is saved to the database, however, when the record is viewed afterwards the selected state is not shown in the select nor are any states for the selected country. I understand why this is happening as, the admin view is not aware of the relation between the state and the country. So here is the question. Is there a hook in the admin view that will allow me to load the correct states for the country and set the selected attribute on the option in the select tag? Or how can I override the admin view for any forms that require the country and region/state/province set? I am using jQuery and Djando-1.1. Thanks

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• Optional attribute values in MappedField

  - by David Brooks

  I'm new to Scala and Lift, coming from a slightly odd background in PLT Scheme. I've done a quick search on this topic and found lots of questions but no answers. I'm probably looking in the wrong place. I've been working my way through tutorials on using Mapper to create database-backed objects, and I've hit a stumbling block: what types should be used to stored optional attribute values. For example, a simple ToDo object might comprise a title and an optional deadline (e.g. http://rememberthemilk.com). The former would be a MappedString, but the latter could not be a MappedDateTime since the type constraints on the field require, say, defaultValue to return a Date (rather than a Date or null/false/???). Is an underlying NULL handled by the MappedField subclasses? Or are there optional equivalents to things like MappedInt, MappedString, MappedDateTime that allow the value to be NULL in the database? Or am I approaching this in the wrong way?

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• Visual Studio Website: Can't create an SQL Database!

  - by Andreas

  Hi, I'm using Visual Studio 2008 SP1 with SQL Server 2008. I'am trying to add an SQL Server File (MDF) in my Website project. Then I get the following error: Connections to SQL Server files (*.mdf) require SQL Server Express 2005 to function properly. Please verify... I've been using Google without any results, and I'm in deep need for help.. I've tried the following things to fix it, without succes: Changing instance names so they should fit Attaching the database in the management studio Uninstall/Install Visual Studio Uinstall/Install SQL Server 2005 AND 2008 All in all, this is a REALLY annoying error and it just should work..

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• Nicely printing/showing a binary tree in Haskell

  - by nicole

  I have a tree data type: data Tree a b = Branch b (Tree a b) (Tree a b) | Leaf a ...and I need to make it an instance of Show, without using deriving. I have found that nicely displaying a little branch with two leaves is easy: instance (Show a, Show b) => Show (Tree a b) where show (Leaf x) = show x show (Branch val l r) = " " ++ show val ++ "\n" ++ show l ++ " " ++ show r But how can I extend a nice structure to a tree of arbitrary size? It seems like determining the spacing would require me to know just how many leaves will be at the very bottom (or maybe just how many leaves there are in total) so that I can allocate all the space I need there and just work 'up.' I would probably need to call a size function. I can see this being workable, but is that making it harder than it is?

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• Error while sending message using xmpp4r_facebook

  - by santu

  I am following the instructions presented in http://dalibornasevic.com/posts/35-how-to-send-private-messages-with-facebook-api to send message to my friend and currently testing from command line. Following is the code I am using require 'xmpp4r_facebook' id = '<my facebook id>@chat.facebook.com' to = '<my friend facebook id>@chat.facebook.com' body = "hello, Im not spam!" subject = 'message from ruby' message = Jabber::Message.new to, body message.subject = subject client = Jabber::Client.new Jabber::JID.new(id) client.connect client.auth_sasl(Jabber::SASL::XFacebookPlatform.new(client, '<App ID>', '<access token got from https://developers.facebook.com/tools/explorer>', 'App Secret'), nil) I get the error RuntimeError: not-authorized from /Users/apple/.rvm/gems/ruby-1.9.3-p194/gems/xmpp4r_facebook-0.1.1/lib/xmpp4r_facebook.rb:103:in `auth' from /Users/apple/.rvm/gems/ruby-1.9.3-p194/gems/xmpp4r-0.5/lib/xmpp4r/client.rb:171:in `auth_sasl' from (irb):12 from /Users/apple/.rvm/rubies/ruby-1.9.3-p194/bin/irb:16:in `<main>'

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• How to get characters read from the keyboard?

  - by Sandy

  Hi, I am trying to get the characters read from the keyboard. I have the following list of that I wish to recognize if entered by a user. List of keyboard entries: letters [ ] ~ ^ numbers Part of the code: void HookManager_KeyUp(object sender, KeyEventArgs e) { string test = e.KeyCode.ToString(); Here numbers, letters and square brackets work correctly but the ~ and ^ which require shift key is read incorrectly. For eg. it reads ^ which is on key 6 as a value of 6 and not ^ as it should be. Any help would be appreciated. Thanks AA

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• Can I create support multiple database transactions on a single connection?

  - by draezal

  I have created a HyperSQL Database. I was just wondering whether I could run multiple transactions on a single connection. I didn't want to spawn a new connection for each transaction due to the overhead associated with this. Looking at some similar questions the suggestion appeared to be to create a pool of database connections and then block waiting for one to become available. This is a workable, but not desirable solution. Background Info (if this is relevant to the answer). My application will create a new thread when some request comes in. This request will require a database transaction. Then some not insignificant time later this transaction will be committed. Any advice appreciated :)

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• Cocoa: how to implement a custom NSView with an editable text area?

  - by Rinzwind

  What's the minimum implementation needed to make a custom NSView with an editable text area? I assume NSTextFieldCell can be used for this. I've succeeded in drawing the cell in the view (which is straightforward), but making it editable seems to require a more complicated coordination between the view and the cell. Is there sample code available somewhere? Update. I should have made clear that my longer-term goal is to have many more editable text areas on the same view. AFAIU it is better to use cells in that case as they are more light-weight than full-blown views. My updated question is: What's the minimum implementation needed to make a custom NSView with an editable text area using an appropriate NSCell?

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• PHP, MVC, 404 - How can I redirect to 404?

  - by Doug

  I'm trying to build my own MVC as a practice and learning experience. So far, this is what I have: <?php require "config.php"; $page = $_GET['page']; if( isset( $page ) ) { echo "isset is true"; if( file_exists( MVCROOT . "/$page.php" ) ) { include "$page.php"; } else { header("HTTP/1.0 404 Not Found"); } } ?> My problem here is, I can't use header to send to a 404 because the headers have been send already. Should I just redirect to a 404.html or is there a better way? Feel free to critique what I have so far (it's very little). I would love suggestions and ideas. Thanks!

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• functions inside or outside jquery document ready

  - by Hans

  Up until now I just put all my jQuery goodness inside the $(document).ready() function, including simple functions used in certain user interactions. But functions that don´t require the DOM document to be loaded or are only called afterwards anyway, can be placed outside the $(document).ready() as well. Consider for example a very simple validation function such as: function hexvalidate(color) { // Validates 3-digit or 6-digit hex color codes var reg = /^(#)?([0-9a-fA-F]{3})([0-9a-fA-F]{3})?$/; return reg.test(color); } The function is only called from within the $(document).ready() function though. What is best practice (syntax, speed); placing such a function inside or outside the jquery document ready function?

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• Building a minimal plugin architecture in Python.

  - by dF

  I have an application, written in Python, which is used by a fairly technical audience (scientists). I'm looking for a good way to make the application extensible by the users, i.e. a scripting/plugin architecture. I am looking for something extremely lightweight. Most scripts, or plugins, are not going to be developed and distributed by a third-party and installed, but are going to be something whipped up by a user in a few minutes to automate a repeating task, add support for a file format, etc. So plugins should have the absolute minimum boilerplate code, and require no 'installation' other than copying to a folder (so something like setuptools entry points, or the Zope plugin architecture seems like too much.) Are there any systems like this already out there, or any projects that implement a similar scheme that I should look at for ideas / inspiration?

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• Why doesn't C have rotate left/right operators?

  - by icepack

  A bit of a philosophical question, I suppose. Hope it belongs here. C language has the standard set of bit-wise operations, including OR, AND, XOR, SHIFT LEFT/RIGHT, NOT. Anyone has an idea why rotate left/rotate right isn't included in the language? These operators are of the same complexity as other bit-wise operators and normally require a single assembly instruction, like the others. Besides, I can think of a lot of uses for rotate operator, probably not less than, say, xor operator - so it sounds a bit strange to me that they aren't included in C along with the rest. Edit: Please stop suggesting implementations of rotation operators. I know how to do that and it's not what the question about.

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• Visual Studio 2010 ClickOnce prerequisites from same location

  - by muhan

  I'm using clickonce publishing and want to require .net 3.5 framework and others as prerequisites. I have selected the option to download the prerequisites from same folder as my app. I've also placed the .net 3.5 redistributable exe in the folder on the server where the app will be published. I publish by FTP over the internet to the server where the users are. However, VS will not let me publish saying it can't find the prerequisites on disk. Does this mean I have to have the prerequisites installed somewhere on my developer machine and that those files will all be uploaded by FTP to the server everytime I publish a new version to the server? That would be a huge amount of data to upload over my slow DSL upload link. Any insight?

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• intelligent thin start with port alias for bash

  - by seaofclouds

  i would like a single alias (ts) which starts my local development server. the script should test for an open port starting at 3000 and use the first available port. additionally, some sites require a rackup file, making -R config.ru necessary. this script should check the current directory for the config.ru file and add that to the alias if present. currently, to start my local development environment, i run: alias ts="thin -R config.ru -p 3000 start" often, i need to run several servers to test different sites, so i've created additional aliases: alias ts1="thin -R config.ru -p 3001 start"

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• Network Security and Encryption explained in laymen terms

  - by Ehrann Mehdan

  Although I might pretend very well that I known a thing about networks or security and it might help me pass an interview, or fix a bug, I don't really feel I'm fooling anyone. I'm looking for a laymen terms explanation of nowadays network security concepts and solutions. The information is scattered around and I didn't find a resource for "dummies" like me (e.g experienced Java developers that can speak the jargon but have no real clue what it means) Topics I have a weak notion about and want to understand better as a Java developer PGP Public / Private keys RSA / DES SSL and 2 way SSL (keystore / trustore) Protecting against Man in the middle fraud Digital Signature and Certificates Is there a resource out there that really explains it in a way that doesn't require a Cisco certificate / Linux lingo / know what is subnet masking or other plumbing skills?

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• Microsoft SQL Server 2008 Web Edition: is it suitable for "closed" websites?

  - by micha12

  Can Microsoft SQL Server 2008 Web Edition be used in "closed" websites, which are hosted on the Internet, but require users to log in? We are developing a web application for banks. This is a website for clients of the bank; it allows clients to log in and view information on their personal banking accounts, stock portfolios, etc. Can this web app use SQL Server 2008 Web Edition? Here is information on this edition of SQL Server: http://www.microsoft.com/sqlserver/2008/en/us/web.aspx It is said on this page that Web Edition can be used only on "public and Internet accessible ... Web applications". Technically, the web app we are developing is public and Internet accessible - although it requires authentication. Won't using Web Edition in our web app violate SQL Server license terms? Thank you.

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• How do people manage changes to common library files stored across mutiple (Mercurial) repositories?

  - by mckoss

  This is perhaps not a question unique to Mercurial, but that's the SCM that I've been using most lately. I work on multiple projects and tend to copy source code for libraries or utilities from a previous project to get a leg up on starting a new project. The problem comes in when I want to merge all the changes I made in my latest project, back into a "master" copy of those shared library files. Since the files stored in disjoint repositories will have distinct version histories, Mercurial won't be able to perform an intelligent merge if I just copy the files back to the master repo (or even between two independent projects). I'm looking for an easy way to preserve the change history so I can merge library files back to the master with a minimum of external record keeping (which is one of the reasons I'm using SVN less as merges require remembering when copies were made across branches). Perhaps I need to do a bit more up-front organization of my repository to prepare for a future merge back to a common master.

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• Cheap windows driver signing for 64 bit Windows 7

  - by kayahr

  I need to install the libusb-win32 driver on Windows 7 64 bit machines. This driver is open source so it is not digitally signed so I want to do this my self but I wonder if this can be done WITHOUT paying lot of money. Is it possible to use a certificate which is NOT signed by Verisign or GlobalSign? Maybe self-signed or by using StartSSL instead? And if yes, how do I do it? According to this howto I have to use a "cross-certificate" (And there are only six available on the Microsoft list and most of them are for CAs which are no longer active) I don't care if the user is confronted with a warning message. I can even accept if the user has to install a special CA certificate first. I only require that the driver runs without manually disabling the signature check on each windows startup.

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• Drupal email users

  - by msindle

  I'm using Drupal 6.16: When a user creates an account on my site I have them select a category (ie children, youth, adult, etc). This is done with the select list box using the content_profile module. I have a content type that posts an announcement. In this content type is a check box that says 'email group'. Right now it does nothing, but what I would like for it to do is e-mail all the users that are associated with the group they chose when signing up for their account. If this will require extra code please be specific as I am not a strong php programmer. Thanks for the help!! msindle

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• Auto login on website

  - by jacktol

  I'm working on an application which consists of a Web Application and a Standalone Application. Both of the applications use the same database and require authentication and authorization. Within the Standalone Application a web browser needs to be opened, going to a page within the Web Application. This page is for authorized users only. Could anyone tell me if there is an easy way to automatically login within the Web Application via the Standalone Application? Besides using cookies or providing a token in the url. Thank you.

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• How to run an executable as a system service?

  - by byanity

  I've got a file and data distribution application written in .NET 2.0 I've written similar to Steam. This application will need to run in Windows 7 and will need to be able to run and install applications that require administrator rights. However the users will not have admin rights. My thought was to run the application as a Local System Service. I figured by doing this the application could perform admin rights actions (registry edits, launching apps, etc) when the user isn't an admin. Are my assumptions correct? What steps do I need to take to have this app install as a Local System Service? An Administrator will be installing the application but it will be run by a user without Administrator rights. Thanks in advance!

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