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• IoC and Design Time

  - by benPearce

  I have a WPF application which I am using to learn MVVM and IoC. The problem is that the Model used by one of the Views expects to pull one of its dependancies in the constructor from an IoC container. When working on this View in the Visual Studio designer it cannot show the design because an exception is being raised in the model. Is there a way around this? Am I pulling my dependancies in the wrong place in code or is there a way I can pass in constructed dependancies, perhaps through Constructor injection. At present the IoC container is setup in code in App.xaml.cs. The IoC container is a roll-your-own taken from this article on MSDN - http://msdn.microsoft.com/en-us/magazine/cc337885.aspx

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• Nested queries in Arel

  - by Schrockwell

  I am attempting to nest SELECT queries in Arel and/or Active Record in Rails 3 to generate the following SQL statement. SELECT sorted.* FROM (SELECT * FROM points ORDER BY points.timestamp DESC) AS sorted GROUP BY sorted.client_id An alias for the subquery can be created by doing points = Table(:points) sorted = points.order('timestamp DESC').alias but then I'm stuck as how to pass it into the parent query (short of calling #to_sql, which sounds pretty ugly). How do you use a SELECT statement as a sub-query in Arel (or Active Record) to accomplish the above? Maybe there's an altogether different way to accomplish this query that doesn't use nested queries?

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• Retrieving FBO data in GLSL

  - by Tom Savage

  I'm trying to get MRT working in OpenGL to try out deferred rendering. Here's the situation as I understand it. Create 3 render buffers (for example). Two RGBA8 and one Depth32. Create an FBO. Attach render buffers to FBO. ColorAttachment0/1 for color buffers, DepthAttachment for depth buffer. Bind the FBO. Draw geometry. Send data to different attachments using gl_FragData[] in the frag shader. At this point I would want to take the data in another pass using GLSL, how can a) retrieve data from the framebuffer color attachments, b) get data from the depth component.

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• Representing Objective C Protocols on UML class diagrams

  - by joec

  How should i correctly reference protocols on a UML class diagram? For example my ListViewController conforms to the UITableViewDataSource and UITableViewDelegate protocols... where do i put the cellForRowAtIndexPath or numberOfRowsInSection methods? ... in ListViewController where they are implemented or in something like this: <<Protocol>> UITableViewDataSource --------------------- --------------------- -numberOfRowsInSection If i did the latter what would be the association between the ListViewController class and the protocol box be? All i have to show is how i hook into Cocoa Touch some how. Thanks.

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• Java input method for Virtual Keyboad

  - by shekhar

  Hi, I am facing problem in implementing Input method for Virtual Keyboard, currently I am using robot class for sending input to any application from virtual keyboard. but for that I need to create mapping of key-code and unicode, which is not consistent on different keyboard layout, can I directly pass the UNICODE to any application using Input method without worry about mapping between keycode and unicode. any useful link or sample code will be useful. It is simple Java program which is always on top of any application and work as onscreen keyboard. using a mouse while you press any button (key) of the keyboard, the corresponding character will be typed in the application running below. This is working perfectly for English Alphabets. I am facing problem while I am doing for unicode.

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• Android and Protocol Buffers

  - by spaceboy2000

  I am writing an Android application that would both store data and communicate with a server using protocol buffers. However, the stock implementation of protocol buffers compiled with the LITE flag (in both the JAR library and the generated .java files) has an overhead of ~30 KB, where the program itself is only ~30 KB. In other words, protocol buffers doubled the program size. Searching online, I found a reference to an Android specific implementation. Unfortunately, there seems to be no documentation for it, and the code generated from the standard .proto file is incompatible with it. Has anyone used it? How do I generate code from a .proto file for this implementation? Are there any other lightweight alternatives?

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• Error: An aggregate may not appear in the WHERE clause unless it is in a subquery contained in a HAV

  - by brz dot net

  I have to find the indentid from the status table based on below two conditions: 1. If there are more than one record having same indentid in status table and the same indentID has count1 in feasibilitystatus table then I don't want to display the record. 2. If there is only one record of indentid in status table and the same indentID has count0 in feasibilitystatus table then I don't want to display the record. Query: select distinct s.indentid from status s where s.status='true' and s.indentid not in( select case when count(s.indentid)>1 then (select indentid from feasibilitystatus group by indentid having count(indentid)>1) else (select indentid from feasibilitystatus group by indentid having count(indentid)>0) end as indentid from status) Error: An aggregate may not appear in the WHERE clause unless it is in a subquery contained in a HAVING clause or a select list, and the column being aggregated is an outer reference.

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• Share data between usercontrols

  - by toraan

  On my page I have n-userControls (same control) I need to communicate between them(to be more specific I need to pass one in value) . I don't want to involve the hosting page for that. The controls acts as "pagers" and interact with the paged data on the hostin page via events that hosting page is subscribed to. So when user click on one of the pager and changes it's state, the other control should know about it and change itself accordingly. I can not use VieState because viewstate is per control and so is the controlstate. Can I use Session for that? (session is shared and there is only one value that i need to store) Or maybe there is something better I can use? (no QueryString)

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• Project roles discovery

  - by Lirik

  I have a school project in which we're going to write a financial engine prototype by a group of 4 people. Most of us have never met each other before, so I'm trying to create a questionnaire to help us find the appropriate roles for each team-member. We have the following responsibilities: Database design Programming User interface design Training Documentation / technical writing Network design Project management Business analysis Testing And we have the following roles: Project Manager Developer Tester Business Analyst Our group has people with various experience: a full-time graduate student, an associate director at the CME (Chicago Mercantile Exchange), full-time professionals, etc. Do any of you know of any tools that would help build a questionnaire or do you have a reference to an online questionnaire that can help us identify the most suitable role(s) for each team member?

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• Is it possible to mask CALayer in iPhone?

  - by Eonil

  I'm trying to mask CALayer with a bitmap image. And I failed masking CALayer. My code is: // 'PreloadViewController layerWithImageNamed' create a layer and set it's contents as specified UIImage. CALayer* title = [PreloadViewController layerWithImageNamed:@"pinkhug_txt.png"]; [[[self view] layer] addSublayer:title]; CALayer* title_mask = [PreloadViewController layerWithImageNamed:@"hug_mask.png"]; [title setMask:title_mask]; The Apple reference says "CALayer in iPhone does not support mask property". But there is a postings about this on SO. Is it possible? Or what's wrong with my code?

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• View problem - how to show integer from activity in XML?

  - by Oliver Goossens

  Hi there, I started two days ago with android, gone through the hello android stuff and also started to read the Hello Android book, which is great. PROBLEM: I use in my app - VERY EASY APP- the XML output. So basically the main activity just tells the android to show the XML layout of main. But what if I have in the activity - code defined integer variable and I want this integer variable also be shown on the display? How do I PUSH the integer variable to the XML??? From main XML reference to other strings in XML is easy - @string/app_name ... but how do I use the integer variable from the activity? Please help Thank you Oliver

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• Flash player "now playing list" without interrupting current song

  - by Shanon

  I am designing a website that plays music. I need a flash player that has or can handle a now playing list. The problem I am facing is that I cannot update the playlist without refreshing the player which means it will interrupt the song that is currently playing. I have trying with JW player in particular so far and have not been successful. All i am able to do is pass a playlist as an xml file but not able to update it without refreshing the playlist. Is there any other player that would better suit my needs? Is there a way i can do this with jw player itself

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• Drag and Drop to a Powershell script

  - by Nathan Hartley

  I thought I had an answer to this, but the more I play with it, the more I see it as a design flaw of Powershell. I would like to drag and drop (or use the Send-To mechanism) to pass multiple files and/or folders as a array to a Powershell script. Test Script #Test.ps1 param ( [string[]] $Paths, [string] $ExampleParameter ) "Paths" $Paths "args" $args I then created a shortcut with the following command line and dragged some files on to it. The files come across as individual parameters which first match the script parameters positionally, with the remainder being placed in the $args array. Shortcut Attempt 1 powershell.exe -noprofile -noexit -file c:\Test.ps1 I found that I can do this with a wrapper script... Wrapper Script #TestWrapper.ps1 & .\Test.ps1 -Paths $args Shortcut Attempt 2 powershell.exe -noprofile -noexit -file c:\TestWrapper.ps1 Has anyone found a way to do this without the extra script?

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• multiple polls with email submit function

  - by Chris Mousdale

  I want to add a 4 sets of polls that each have around 4 radio buttons each for answers - then i would like to add an 'enter your email address' field below these polls. Finally I would like the submit button after the email field to 'submit' the data from the polls and the email address entered - so only one submit button. Just to make things even better, I would like some form of validation, that will not pass the form unless all 4 polls have a radio button pressed and a valid email. All this is then to go into a MySQL database. I have the email validation bit nailed - so thats fine.. it's the multiple polls bit thats getting me - I cannot get it to work?! Do i have to effectively add 5 forms? Any help would be greatly appreciated.

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• XCode toolchain error: dyld: Symbol not found: _objc_collect_if_needed

  - by freespace

  I have been seeing the following error message a lot whenever I build something using the simulator: dyld: Symbol not found: _objc_collect_if_needed Referenced from: /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator3.1.sdk/System/Library/Frameworks/Foundation.framework/Foundation Expected in: /usr/lib/libobjc.A.dylib in /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator3.1.sdk/System/Library/Frameworks/Foundation.framework/Foundation I am running XCode 3.2.2 on OS X 10.6.3, and have reinstalled the SDK twice with no avail. This error makes running any code on the simulator something of a Russian Roulette, but with 5 out of 6 chambers loaded. I have checked the files mentioned in the error message, and they all checkout as being present. This sometimes go away if I restart XCode. Other times I have to logout, or even restart. And sometimes nothing works. I have googled this, even tried apple's developer forums. Other than a reference to this in the MonoTouch list, this bug appears to be completely unknown otherwise. Anything help would be greatly appreciated - this is a real PITA. Cheers, Steve

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• How "duplicated" Java code is optimized by the JVM JIT compiler?

  - by Renan Vinícius Mozone

  I'm in charge of maintaining a JSP based application, running on IBM WebSphere 6.1 (IBM J9 JVM). All JSP pages have a static include reference and in this include file there is some static Java methods declared. They are included in all JSP pages to offer an "easy access" to those utility static methods. I know that this is a very bad way to work, and I'm working to change this. But, just for curiosity, and to support my effort in changing this, I'm wondering how these "duplicated" static methods are optimized by the JVM JIT compiler. They are optimized separately even having the exact same signature? Does the JVM JIT compiler "sees" that these methods are all identical an provides an "unified" JIT'ed code?

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• route finding between two designation on maps in android?

  - by androidbase Praveen

  i want to just find a shortest path between the location on map. we have to pass the location's geopoint then click the button to get direction. it will show the shortest path like a blue line. how to do this? i search about this. many of them import a package com.google.googlenav.*;. where i have to get this? Any Idea???? Edit:got downloaded the Cloudemade API. how to draw the lines between the points.

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• Which method of creating javascript objects is better?

  - by Germaine

  I've seen objects defined in two different ways, which function similarly, but are, of course, fundamentally different. You can do it either like this: var myobject = {property: 'hello', act: function() { this.property += ' world'; }}; and like this: function myobject() { this.property = 'hello'; this.act = function() { this.property += 'world'; } } The second method could create objects like so var newobj = new myobject(); but you could do something similar using the first notation by making the object the return value of a function. The new keyword has the advantage of being able to pass parameters that can be used to initialize the properties of the object, but you could just as easily add an init function to the first kind of object. Just wondering if besides these two differences, if there was a fundamental difference that made one method definitely better than the other method.

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• Using Proguard for Android in Eclipse Problem

  - by Chris

  I have taken a fresh install of Eclipse and all the latest Android tools and want to use Proguard on existing project, but for now I have created a new blank one. I have added a proguard.cfg file to my project added proguard.config=proguard.cfg to my default.properties Now when I try to export I get the following error [2010-12-12 10:36:35 - ApplicationTest] Proguard returned with error code 1. See console [2010-12-12 10:36:35 - ApplicationTest] 'C:\Program' is not recognized as an internal or external command, [2010-12-12 10:36:35 - ApplicationTest] operable program or batch file. [2010-12-12 10:36:35 - ApplicationTest] '-jar' is not recognized as an internal or external command, [2010-12-12 10:36:35 - ApplicationTest] operable program or batch file. I know it means there is a filepath setup incorrectly, question is where the heck is as I have looked through the general properties and project properties and can't see any reference to proguard or obfuscation so am stuck on what to change Any help appreciated.

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• Javascript top variable in IE8

  - by Jim Rootham

  I am trying to reference a javascript function in a .js file loaded in my main page from an iframe using the 'top' variable. It works in FF, Safari, and IE6 but not in IE8. The snippet is (assigned to onmouseover): top.set_image(this, 'images/login_h.png') Where set_image is my function. The error is "Object does not support this function" Also, I have been looking for the definition of top. I can't find it in the ECMAScript specification or the w3schools site and Google is unhelpful (who'da thunk top was a common word?).

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• Passing Custom event arguments to timer_TICK event

  - by Nimesh

  I have class //Create GroupFieldArgs as an EventArgs public class GroupFieldArgs : EventArgs { private string groupName = string.Empty; private int aggregateValue = 0; //Get the fieldName public string GroupName { set { groupName = value; } get { return groupName; } } //Get the aggregate value public int AggregateValue { set { aggregateValue = value; } get { return aggregateValue; } } } I have another class that creates a event handler public class Groupby { public event EventHandler eh; } Finally I have Timer on my form that has Timer_TICK event. I want to pass GroupFieldArgs in Timer_TICK event. What is the best way to do it?

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• Update facebook status using pyfacebook offline access

  - by Alon Carmel

  Hey, I'm trying to update a user status from a django python app. The user went thru facebook connect and registers to the app. I got sessionkey and fbuid. fb = Facebook(FACEBOOK_API_KEY, FACEBOOK_SECRET_KEY) if fbsessionkey: fb.session_key = fbsessionkey fb.uid = fbuid fb.auth.createToken() fb.auth.getSession() #update the facebook status fb.users.setStatus(status="testing",clear=False) else: pass What am i doing wrong? im getting: Error 104: Incorrect signature Please note the user already granted offline access also. Please help...

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• How do we calculate the filters in Mel-Frequency Cepstrum Coefficients Algorithm?

  - by André Ferreira

  After calculating the FFT and with the frequency we need to do something like this: http://instruct1.cit.cornell.edu/courses/ece576/FinalProjects/f2008/pae26%5Fjsc59/pae26%5Fjsc59/images/melfilt.png We filter the frequency spectrum with those triangles. I saw that we can use distint ways to calculcate the triangles. I will make the size of the triangles equal till 1kz and after that obtained with log function. What should we do now? With the frequency spectrum and the triangles defined.. - We should filter the frequency (frequencies limited to the triangles, if goes higher only counts till the triangle limit) and calculate the value of each triangle (and after that continue the algorithm). But when does the mel conversation happens? m = 2595 log (f/700 + 1) When do we pass from frequency to mel.. Can someone guide me in the right direction plz :d

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• How to control allowed HTML tags in WMD Editor?

  - by Toto

  I am trying to some-how set the valid HTML tags and attributes users would be able to use in WMD Editor in my site. For example, I want to forbid the user to directly set the font size, color, typeface and so on, which is trivial to do with the default settings typing something like: <span style="font-size: 45px; color:#FF0000">Some intrusive text here</span>. I think the way to implement this is through the "wmd_options", but I have not found any documentation or reference regarding this, giving the fact that the 'Options demo' seems to be the only public documentation and it does not show how should I do what I have described above. I've send this same question to [email protected] but didn't get any reply. As stackoverflow uses this editor someone reading this or maybe Jeff knows the answer ;) Thanks in advance!

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• Rails choking on the content of this request because of protect_from_forgery

  - by randombits

  I'm trying to simply test my RESTful API with cURL. Using the following invocation: curl -d "name=jimmy" -H "Content-Type: application/x-www-form-urlencoded" http://127.0.0.1:3000/people.xml -i Rails is dying though: ActionController::InvalidAuthenticityToken (ActionController::InvalidAuthenticityToken): :8:in `synchronize' Looks like it's running this through a protect_from_forgery filter. I thought protect_from_forgery is excluded for non-HTML HTTP POST/PUT/DELETE type requests? This is clearly targeting the XML format. If I pass actual XML content, it works. But my users will be submitting POST data as URL encoded parameters. I know all the various ways I can disable protect_from_forgery but what's the proper way of handling this? I want to leave it on so that when I do have HTML based forms and handle format.html, I don't forget to re-enable it for then. I want users to be able to make HTTP POST requests to my XML-based API though and not get bombarded with this.

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