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• what is the best way to stream a audio file to website users/listners

  - by Naveen Chamikara Gamage

  I'm developing a music site which will stream audio files stored in a server to users, audio files will be played through flash player placed in a webpage.. As I heard I need to use a streaming media server for streaming audio files ( like 2mb to 3mb in size).. Do I need to use one? I found some streaming media server softwares like http://www.icecast.org - but as in their documentation, It is used for streaming radio stations and live streaming purposes, but I just need to stream audio files faster and in low size (low bandwidth) with good quality.. I heard I need to encode the audio files first and then send them to listeners and in their end audio files need to be decoded again. Is that true? How can I do that? if I need to use a special web server, where should I host my files? Any good hosting providers? if I host audio files in a normal web server, they will use HTTP or TCP to deliver my audio files to users/ listners but I found that HTTP and TCP are not good ways to use for multi media purposes like streaming audio and video files, and they are used for delivering HTML and stuff. I found I should use RSTP or UDP for streaming audio files.. What should I use? I know that .MP3 files has much better quality than the other formats but it also gives huge size to the audio files.. which format should I use for audio files? Most of the best quality audio files are more than 7mb so I'm planning to convert them my self using a software so I could get low size files with some level of good quality. If I'm converting my audio files what is the good BITRATE I should use for my files? Any known best softwares for converting audio files while keeping quality in a good level? Note** - I know that I will not need complex requirements at the beginning of the site but I wanted to what are the best ways like they are using for soundcloud.com

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• Best Pattern for AllowUnsafeUpdates

  - by webwires

  So far, in my research I have seen that it is unwise to set AllowUnsafeUpdates on GET request operation to avoid cross site scripting. But, if it is required to allow this, what is the proper way to handle the situation to mitigate any exposure? Here is my best first guess on a reliable pattern if you absolutely need to allow web or site updates on a GET request. Best Practice? protected override void OnLoad(System.EventArgs e) { if(Request.HttpMethod == "POST") { SPUtility.ValidateFormDigest(); // will automatically set AllowSafeUpdates to true } // If not a POST then AllowUnsafeUpdates should be used only // at the point of update and reset immediately after finished // NOTE: Is this true? How is cross-site scripting used on GET // and what mitigates the vulnerability? } // Point of item update SPSecurity.RunWithElevatedPrivledges(delegate() { using(SPSite site = new SPSite(SPContext.Current.Site.Url)) { using (SPWeb web = site.RootWeb) { bool allowUpdates = web.AllowUnsafeUpdates; //store original value web.AllowUnsafeUpdates = true; //... Do something and call Update() ... web.AllowUnsafeUpdates = allowUpdates; //restore original value } } }); Feedback on the best pattern is appreciated.

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• Best way to enforce inter-table constraints inside database

  - by FerranB

  I looking for the best way to check for inter-table constraints an step forward of foreing keys. For instance, to check if a date child record value is between a range date on two parent rows columns. For instance: Parent table ID DATE_MIN DATE_MAX ----- ---------- ---------- 1 01/01/2009 01/03/2009 ... Child table PARENT_ID DATE ---------- ---------- 1 01/02/2009 1 01/12/2009 <--- HAVE TO FAIL! ... I see two approaches: Create materialized views on-commit as shown in this article (or other equivalent on other RDBMS). Use stored-procedures and triggers. Any other approach? Which is the best option? UPDATE: The motivation of this question is not about "putting the constraints on database or on application". I think this is a tired question and anyone does the way she loves. And, I'm sorry for detractors, I'm developing with constraints on database. From here, the question is "which is the best option to manage inter-table constraints on database?". I'm added "inside database" on the question title. UPDATE 2: Some one added the "oracle" tag. Of course materialized views are oracle-tools but I'm interested on any option regardless it's on oracle or others RDBMSs.

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• MVVM Binding Orthogonal Aspects in Views e.g. Application Settings

  - by chibacity

  I have an application which I am developing using WPF\Prism\MVVM. All is going well and I have some pleasing MVVM implementations. However, in some of my views I would like to be able to bind application settings e.g. when a user reloads an application, the checkbox for auto-scrolling a grid should be checked in the state it was last time the user used the application. My view needs to bind to something that holds the "auto-scroll" setting state. I could put this on the view-model, but applications settings are orthogonal to the purpose of the view-model. The "auto-scroll" setting is controlling an aspect of the view. This setting is just an example. There will be quite a number of them and splattering my view-models with properties to represent application settings (so I can bind them) feels decidedly yucky. One view-model per view seems to be de rigeuer... What is best\usual practice here? Splatter my view-models with application settings? Have multiple view-models per view so settings can be represented in their own right? Split views so that controls can bind to an ApplicationSettingsViewModel? = too many views? Something else? Edit 1 To add a little more context, I am developing a UI with a tabbed interface. Each tab will host a single widget and there a variety of widgets. Each widget is a Prism composition of individual views. Some views are common amongst widgets e.g. a file picker view. Whilst each widget is composed of several views, as a whole, conceptually a widget has a single set of user settings e.g. last file selected, auto-scroll enabled, etc. These need to be persisted and retrieved\applied when the application starts again, and the widget views are created. My question is focused on the fact that conceptually a widget has a single set of user settings which is at right-angles to the fact that a widget consists of many views. Each view in the widget has it's own view-model (which works nicely and logically) but if I stick to a one view-model per view, I would have to splatter each view-model with user settings appropriate to it. This doesn't sound right ?!?

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• Rails 3 routing - what's best practice?

  - by Mattias

  Hi guys, I'm trying out Rails, and I've stumbled across an issue with my routing. I have a controller named "Account" (singular), which should handle various settings for the currently logged in user. class AccountController < ApplicationController def index end def settings end def email_settings end end How would I set-up the routes for this in a proper manner? At the moment I have: match 'account(/:action)', :to => 'account', :as => 'account' This however does not automagically produce methods like account_settings_path but only account_path Is there any better practice of doing this? Remember the Account controller doesn't represent a controller for an ActiveModel. If this is in fact the best practice, how would I generate links in my views for the actions? url_to :controller => :account, :action => :email_settings ? Thanks!

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• Best Way to View Generated Source of Webpage?

  - by jeremy

  I'm looking for a tool that will give me the proper generated source including DOM changes made by AJAX requests for input into W3's validator. I've tried the following methods: Web Developer Toolbar - Generates invalid source according to the doc-type (e.g. it removes the self closing portion of tags). Loses the doctype portion of the page. Firebug - Fixes potential flaws in the source (e.g. unclosed tags). Also loses doctype portion of tags and injects the console which itself is invalid HTML. IE Developer Toolbar - Generates invalid source according to the doc-type (e.g. it makes all tags uppercase, against XHTML spec). Highlight + View Selection Source - Frequently difficult to get the entire page, also excludes doc-type. Is there any program or add-on out there that will give me the exact current version of the source, without fixing or changing it in some way? So far, Firebug seems the best, but I worry it may fix some of my mistakes. Solution It turns out there is no exact solution to what I wanted as Justin explained. The best solution seems to be to validate the source inside of Firebug's console, even though it will contain some errors caused by Firebug. I'd also like to thank Forgotten Semicolon for explaining why "View Generated Source" doesn't match the actual source. If I could mark 2 best answers, I would.

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• Ext JS 4.2.1 loading controller - best practice

  - by Hown_

  I am currently developing a Ext JS application with many views/controlers/... I am wondering myself what the best practice is for loading the JS controllers/views/and so on... currently i have my application defined like this: // enable javascript cache for debugging, otherwise Chrome breakpoints are lost Ext.Loader.setConfig({ disableCaching: false }); Ext.require('Ext.util.History'); Ext.require('app.Sitemap'); Ext.require('app.Error'); Ext.define('app.Application', { name: 'app', extend: 'Ext.app.Application', views: [ // TODO: add views here 'app.view.Viewport', 'app.view.BaseMain', 'app.view.Main', 'app.view.ApplicationHeader', //administration 'app.view.administration.User' ... ], controllers: [ 'app.controller.Viewport', 'app.controller.Main', 'app.controller.ApplicationHeader', //administration 'app.controller.administration.User', ... ], stores: [ // stores in there.. ] }); somehow this forces the client to load all my views and controllers at startup and is calling all init methods of all controllers of course.. i need to load data everytime i chnage my view.. and now i cant load it in my controllers init function. I would have to do something like this i assume: init: function () { this.control({ '#administration_User': { afterrender: this.onAfterRender } }); }, Is there a better way to do this? Or just an other event? Though the main thing i am questioning myself is if it is the best practice to load all the javascript at startup. Wouldnt it be better to only load the controllers/views/... which the client does need right now? Or should i load all the JS at startup? If i do want to load the controllers dynamicly how could i do this? I assume a would have to remove them from my application arrays (views, controllers, stores) and create an instance if i do need it and mby set the view in the controllers init?! What's best practice??

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• File IO with Streams - Best Memory Buffer Size

  - by AJ

  I am writing a small IO library to assist with a larger (hobby) project. A part of this library performs various functions on a file, which is read / written via the FileStream object. On each StreamReader.Read(...) pass, I fire off an event which will be used in the main app to display progress information. The processing that goes on in the loop is vaired, but is not too time consuming (it could just be a simple file copy, for example, or may involve encryption...). My main question is: What is the best memory buffer size to use? Thinking about physical disk layouts, I could pick 2k, which would cover a CD sector size and is a nice multiple of a 512 byte hard disk sector. Higher up the abstraction tree, you could go for a larger buffer which could read an entire FAT cluster at a time. I realise with today's PC's, I could go for a more memory hungry option (a couple of MiB, for example), but then I increase the time between UI updates and the user perceives a less responsive app. As an aside, I'm eventually hoping to provide a similar interface to files hosted on FTP / HTTP servers (over a local network / fastish DSL). What would be the best memory buffer size for those (again, a "best-case" tradeoff between perceived responsiveness vs. performance).

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• Best Practise: DNS and VPN (with private network IPs)

  - by ribx

  I am trying to find the best solution for my DNS problem. We are running several services in our company that you can reach only over VPN. Other services, that are reachable through the internet got the domain ... At the moment all services inside the VPN network go by .local... These have an VPN IP of the private network 192.168.252.0/24. Clients reach from Linux over OSX to Windows. I can think of 4 possibilities to implement a DNS infrastructure: Most common: an internal DNS Server, that is pushed by the VPN. But this has several drawbacks: your DNS responses are limited to the speed of the VPN Connection and your own DNS server. Because of very complex websites, this can increase the time for a page to load quite a lot. Also: we have several VPNs that are not connected to each other and all of them have their own DNS server. Several DNS servers locally. These have to be configured by hand. And you have to use some third party tool like dnsmasq. If you start a DNS request, you ask your locally running DNS server, which decides which server to ask for which domain name. One college of mine uses such a solution with this OSX (I am sorry, I don't remember the name of the application). You use your domain hoster. Most of them have APIs available to manipulate your DNS entries. So you could pull your private network informations to your domain hoster. I am not sure whether they all accept private network IPs. But I guess there will be some problems in the same way as in number 4. The one we currently use, because it's for us the most logical choice: we forward the sub domain *.local.. to our own public DNS Server. This works quite good for some public DNS Servers like Google. But most ISPs do not forward the answers. Or don't do that always. Like my ISP sends me a positive result of the a DNS request of a *.local.. domain only every 10th time I make a nslookup. (Can someone explain this?) Here the real Question: Is there another solution we were not thinking about? Or: What of these methods do you use?

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• Best Processor for MediaSmart Server?

  - by Kent Boogaart

  I'm trying to figure out what the best possible processor is that I can stick in my HP MediaSmart server. I'm clueless when it comes to correlating CPUs to motherboards. I suspect it's the socket type I care about, but I worry that there's more to it. CPU-Z gives me (excerpt): Processors Information ------------------------------------------------------------------------- Processor 1 ID = 0 Number of cores 1 (max 1) Number of threads 1 (max 1) Name AMD Sempron LE-1150 Codename Sparta Specification AMD Sempron(tm) Processor LE-1150 Package Socket AM2 (940) CPUID F.F.1 Extended CPUID F.7F Brand ID 1 Core Stepping DH-G1 Technology 65 nm Core Speed 1000.0 MHz Multiplier x FSB 5.0 x 200.0 MHz HT Link speed 800.0 MHz Stock frequency 2000 MHz Instructions sets MMX (+), 3DNow! (+), SSE, SSE2, SSE3, x86-64 L1 Data cache 64 KBytes, 2-way set associative, 64-byte line size L1 Instruction cache 64 KBytes, 2-way set associative, 64-byte line size L2 cache 256 KBytes, 16-way set associative, 64-byte line size FID/VID Control yes Max FID 10.0x Max VID 1.350 V P-State FID 0x2 - VID 0x12 (5.0x - 1.100 V) P-State FID 0xA - VID 0x0C (9.0x - 1.250 V) P-State FID 0xC - VID 0x0A (10.0x - 1.300 V) K8 Thermal sensor yes K8 Revision ID 6.0 Attached device PCI device at bus 0, device 24, function 0 Attached device PCI device at bus 0, device 24, function 1 Attached device PCI device at bus 0, device 24, function 2 Attached device PCI device at bus 0, device 24, function 3 Chipset ------------------------------------------------------------------------- Northbridge SiS 761GX rev. 02 Southbridge SiS 966 rev. 59 Graphic Interface AGP AGP Revision 3.0 AGP Transfer Rate 8x AGP SBA supported, enabled Memory Type DDR2 Memory Size 2048 MBytes Channels Single Memory Frequency 200.0 MHz (CPU/5) CAS# latency (CL) 5.0 RAS# to CAS# delay (tRCD) 5 RAS# Precharge (tRP) 5 Cycle Time (tRAS) 15 Bank Cycle Time (tRC) 21 Command Rate (CR) 1T DMI ------------------------------------------------------------------------- DMI BIOS vendor Phoenix Technologies, LTD version R03 date 05/08/2008 DMI System Information manufacturer HP product MediaSmart Server version unknown serial CN68330DGH UUID A482007B-B0CC7593-DD11736A-407B7067 DMI Baseboard vendor Wistron model SJD4 revision A.0 serial unknown DMI System Enclosure manufacturer HP chassis type Desktop chassis serial unknown DMI Processor manufacturer AMD model AMD Sempron(tm) Processor LE-1150 clock speed 2000.0 MHz FSB speed 200.0 MHz multiplier 10.0x DMI Memory Controller correction 64-bit ECC Max module size 4096 MBytes DMI Memory Module designation A0 size 2048 MBytes (double bank) DMI Memory Module designation A1 DMI Memory Module designation A2 DMI Memory Module designation A3 DMI Port Connector designation PS/2 Mouse (internal) port type Mouse Port connector PS/2 connector PS/2 DMI Port Connector designation USB0 (external) port type USB DMI Physical Memory Array location Motherboard usage System Memory correction None max capacity 16384 MBytes max# of devices 4 DMI Memory Device designation A0 format DIMM type unknown total width 64 bits data width 64 bits size 2048 MBytes DMI Memory Device designation A1 format DIMM type unknown total width 64 bits data width 64 bits DMI Memory Device designation A2 format DIMM type unknown total width 64 bits data width 64 bits DMI Memory Device designation A3 format DIMM type unknown total width 64 bits data width 64 bits How do I figure out what options I have for an upgrade?

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• The best dvd ripper software in 2014 review

  - by user328170

  The top 3 DVD Ripping Tools in 2014 Nowadays everyone may have several smart mobile devices, such as iphone, ipad air, ipad mini ,Samsung Galaxy and Sony Xperia. If you want to take your movies with your mobile devices, or sometimes just want to backup those classic physical discs on your notebook or workstation with high quality resolutions, you need a fast and stable software to rip them and convert them to the format you like. Fortunately, there are plenty of great software products designed to make the process easy and transform DVD to the files that are playable on any mobile device you choose. We have done a full review on dozens of products. Here are five of the best, based on our review. We test the software from its ripping speed, friendly use guide , reliability and ripping capability. The top one is still Winx DVD Ripper platinum. We've test its 6.1 version 2 years ago for its ability to quickly and easily rip DVDs and Blu-ray discs to high quality MKV files with a single click. It gave us deep impression in the test. This time we test it’s lastest 7.3.5 version. Besides easy use and speed, we test its capability to decrypt all kinds of discs with different protect method, for example, Disney X-project DRM , Sony ArccOS, RCE and region code. The result shows that winx dvd ripper platinum still maintain its advantages in all the area. Winx dvd ripper platinum is a more focused on DVD ripping software with the basic duty to rip and convert DVD. The color of UI is a modern technical sense. All the main functions are shown obviously while others specials are hidden for advanced users, making it more clear and convenient to make option. There are two company weisoft limited and Digiarty who can provide the software. Weisoft limited focus on USA, UK and Australia market. Digiarty focus on others. ripping speed ????? friendly use guide ????? reliability ????? ripping capability ????? The second one DVDFab DVDFab is also very robust during ripping dics. It can also decrypt most of the dics in the market. The shortage it still friendly use and speed. We'd note that the app is frequently updated to cut through the copy protection on even the latest DVDs and Blu-ray discs . The app is shareware, meaning most features are free, including decrypting and ripping to your hard drive. Many of you note that you use another app for compression and authoring, but many of you say they hey, storage is cheap, and the rips from DVDFab are easy, one-click, and work. ripping speed ??? friendly use guide ???? reliability ????? ripping capability ????? The Third one is Handbrake Handbrake is our favorite video encoder for a reason: it's simple, easy to use, easy to install, and offers a lots of options to get the high quality file as a result. If you're scared by them, you don't even have to use them—the app will compensate for you and pick some settings it thinks you'll like based on your destination device. So many of you like Handbrake that many of you use it in conjunction with another app (like VLC, which makes ripping easy)—you'll let another app do the rip and crack the DRM on your discs, and then process the file through Handbrake for encoding. The app is fast, can make the most of multi-core processors to speed up the process, and is completely open source. ripping speed ??? friendly use guide ???? reliability ???? ripping capability ????

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• Please help rails problem with stringify_keys error

  - by richard moss

  I have been trying to solve this for ages and can't figure it out. I have a form like so (taking out a lot of other fields) <% form_for @machine_enquiry, machine_enquiry_path(@machine_enquiry) do|me_form| %> <% me_form.fields_for :messages_attributes do |f| %> <%= f.text_field :title -%> <% end %> <%= me_form.submit 'Send message' %> <% end %> And an update action like @machine_enquiry = MachineEnquiry.find(params[:id]) @machine_enquiry.update_attributes(params[:machine_enquiry] And a machine_enquiry class like so: class MachineEnquiry < ActiveRecord::Base has_many :messages, :as => :messagable, :dependent => :destroy accepts_nested_attributes_for :messages end I am getting an error like so: NoMethodError in Machine enquiriesController#update undefined method `stringify_keys' for "2":String RAILS_ROOT: C:/INSTAN~2/rails_apps/Macrotec28th Application Trace | Framework Trace | Full Trace C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/nested_attributes.rb:294:in `assign_nested_attributes_for_collection_association' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/nested_attributes.rb:293:in `each' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/nested_attributes.rb:293:in `assign_nested_attributes_for_collection_association' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/nested_attributes.rb:215:in `messages_attributes=' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/base.rb:2745:in `send' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/base.rb:2745:in `attributes=' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/base.rb:2741:in `each' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/base.rb:2741:in `attributes=' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/base.rb:2627:in `update_attributes' C:/INSTAN~2/rails_apps/Macrotec28th/app/controllers/machine_enquiries_controller.rb:74:in `update' C:/INSTAN~2/rails_apps/Macrotec28th/app/controllers/machine_enquiries_controller.rb:72:in `update' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/nested_attributes.rb:294:in `assign_nested_attributes_for_collection_association' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/nested_attributes.rb:293:in `each' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/nested_attributes.rb:293:in `assign_nested_attributes_for_collection_association' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/nested_attributes.rb:215:in `messages_attributes=' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/base.rb:2745:in `send' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/base.rb:2745:in `attributes=' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/base.rb:2741:in `each' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/base.rb:2741:in `attributes=' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/base.rb:2627:in `update_attributes' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/mime_responds.rb:106:in `call' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/mime_responds.rb:106:in `respond_to' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/base.rb:1322:in `send' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/base.rb:1322:in `perform_action_without_filters' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/filters.rb:617:in `call_filters' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/filters.rb:610:in `perform_action_without_benchmark' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/benchmarking.rb:68:in `perform_action_without_rescue' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/active_support/core_ext/benchmark.rb:17:in `ms' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/active_support/core_ext/benchmark.rb:10:in `realtime' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/active_support/core_ext/benchmark.rb:17:in `ms' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/benchmarking.rb:68:in `perform_action_without_rescue' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/rescue.rb:160:in `perform_action_without_flash' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/flash.rb:141:in `perform_action' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/base.rb:523:in `send' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/base.rb:523:in `process_without_filters' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/filters.rb:606:in `process' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/base.rb:391:in `process' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/base.rb:386:in `call' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/routing/route_set.rb:433:in `call' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/dispatcher.rb:88:in `dispatch' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/dispatcher.rb:111:in `_call' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/dispatcher.rb:82:in `initialize' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/query_cache.rb:29:in `call' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/query_cache.rb:29:in `call' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/connection_adapters/abstract/query_cache.rb:34:in `cache' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/query_cache.rb:9:in `cache' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/query_cache.rb:28:in `call' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:361:in `call' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/vendor/rack-1.0/rack/head.rb:9:in `call' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/vendor/rack-1.0/rack/methodoverride.rb:24:in `call' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/params_parser.rb:15:in `call' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/rewindable_input.rb:25:in `call' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/session/cookie_store.rb:93:in `call' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/reloader.rb:9:in `call' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/failsafe.rb:11:in `call' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/vendor/rack-1.0/rack/lock.rb:11:in `call' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/vendor/rack-1.0/rack/lock.rb:11:in `synchronize' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/vendor/rack-1.0/rack/lock.rb:11:in `call' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/dispatcher.rb:106:in `call' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/cgi_process.rb:44:in `dispatch_cgi' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/dispatcher.rb:102:in `dispatch_cgi' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/dispatcher.rb:28:in `dispatch' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel/rails.rb:76:in `process' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel/rails.rb:74:in `synchronize' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel/rails.rb:74:in `process' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel.rb:159:in `process_client' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel.rb:158:in `each' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel.rb:158:in `process_client' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel.rb:285:in `run' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel.rb:285:in `initialize' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel.rb:285:in `new' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel.rb:285:in `run' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel.rb:268:in `initialize' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel.rb:268:in `new' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel.rb:268:in `run' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel/configurator.rb:282:in `run' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel/configurator.rb:281:in `each' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel/configurator.rb:281:in `run' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/bin/mongrel_rails:128:in `run' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel/command.rb:212:in `run' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/bin/mongrel_rails:281 C:/INSTAN~2/ruby/bin/mongrel_rails:19:in `load' C:/INSTAN~2/ruby/bin/mongrel_rails:19 C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/nested_attributes.rb:294:in `assign_nested_attributes_for_collection_association' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/nested_attributes.rb:293:in `each' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/nested_attributes.rb:293:in `assign_nested_attributes_for_collection_association' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/nested_attributes.rb:215:in `messages_attributes=' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/base.rb:2745:in `send' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/base.rb:2745:in `attributes=' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/base.rb:2741:in `each' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/base.rb:2741:in `attributes=' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/base.rb:2627:in `update_attributes' C:/INSTAN~2/rails_apps/Macrotec28th/app/controllers/machine_enquiries_controller.rb:74:in `update' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/mime_responds.rb:106:in `call' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/mime_responds.rb:106:in `respond_to' C:/INSTAN~2/rails_apps/Macrotec28th/app/controllers/machine_enquiries_controller.rb:72:in `update' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/base.rb:1322:in `send' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/base.rb:1322:in `perform_action_without_filters' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/filters.rb:617:in `call_filters' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/filters.rb:610:in `perform_action_without_benchmark' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/benchmarking.rb:68:in `perform_action_without_rescue' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/active_support/core_ext/benchmark.rb:17:in `ms' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/active_support/core_ext/benchmark.rb:10:in `realtime' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/active_support/core_ext/benchmark.rb:17:in `ms' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/benchmarking.rb:68:in `perform_action_without_rescue' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/rescue.rb:160:in `perform_action_without_flash' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/flash.rb:141:in `perform_action' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/base.rb:523:in `send' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/base.rb:523:in `process_without_filters' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/filters.rb:606:in `process' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/base.rb:391:in `process' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/base.rb:386:in `call' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/routing/route_set.rb:433:in `call' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/dispatcher.rb:88:in `dispatch' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/dispatcher.rb:111:in `_call' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/dispatcher.rb:82:in `initialize' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/query_cache.rb:29:in `call' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/query_cache.rb:29:in `call' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/connection_adapters/abstract/query_cache.rb:34:in `cache' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/query_cache.rb:9:in `cache' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/query_cache.rb:28:in `call' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:361:in `call' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/vendor/rack-1.0/rack/head.rb:9:in `call' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/vendor/rack-1.0/rack/methodoverride.rb:24:in `call' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/params_parser.rb:15:in `call' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/rewindable_input.rb:25:in `call' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/session/cookie_store.rb:93:in `call' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/reloader.rb:9:in `call' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/failsafe.rb:11:in `call' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/vendor/rack-1.0/rack/lock.rb:11:in `call' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/vendor/rack-1.0/rack/lock.rb:11:in `synchronize' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/vendor/rack-1.0/rack/lock.rb:11:in `call' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/dispatcher.rb:106:in `call' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/cgi_process.rb:44:in `dispatch_cgi' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/dispatcher.rb:102:in `dispatch_cgi' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/dispatcher.rb:28:in `dispatch' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel/rails.rb:76:in `process' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel/rails.rb:74:in `synchronize' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel/rails.rb:74:in `process' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel.rb:159:in `process_client' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel.rb:158:in `each' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel.rb:158:in `process_client' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel.rb:285:in `run' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel.rb:285:in `initialize' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel.rb:285:in `new' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel.rb:285:in `run' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel.rb:268:in `initialize' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel.rb:268:in `new' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel.rb:268:in `run' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel/configurator.rb:282:in `run' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel/configurator.rb:281:in `each' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel/configurator.rb:281:in `run' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/bin/mongrel_rails:128:in `run' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel/command.rb:212:in `run' C:/INSTAN~2/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/bin/mongrel_rails:281 C:/INSTAN~2/ruby/bin/mongrel_rails:19:in `load' C:/INSTAN~2/ruby/bin/mongrel_rails:19 Request Parameters: {"commit"=>"Send message", "_method"=>"put", "machine_enquiry"=>{"messages_attributes"=>{"message"=>"2", "title"=>"1", "message_type_id"=>"1", "contact_detail_ids"=>["1", "11"]}}, "id"=>"2", "datetime"=>""} Why am I getting this error? Can anyone help with this?

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• How to compare nullable types?

  - by David_001

  I have a few places where I need to compare 2 (nullable) values, to see if they're the same. I think there should be something in the framework to support this, but can't find anything, so instead have the following: public static bool IsDifferentTo(this bool? x, bool? y) { return (x.HasValue != y.HasValue) ? true : x.HasValue && x.Value != y.Value; } Then, within code I have if (x.IsDifferentTo(y)) ... I then have similar methods for nullable ints, nullable doubles etc. Is there not an easier way to see if two nullable types are the same? Update: Turns out that the reason this method existed was because the code has been converted from VB.Net, where Nothing = Nothing returns false (compare to C# where null == null returns true). The VB.Net code should have used .Equals... instead.

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• C# Conditional Compilation and framework targets

  - by McKAMEY

  There are a few minor places where code for my project may be able to be drastically improved if the target framework were a newer version. I'd like to be able to better leverage conditional compilation in C# to switch these as needed. Something like: #if NET_40 using FooXX = Foo40; #elif NET_35 using FooXX = Foo35; #else using FooXX = Foo20; #endif Do these symbols come for free? Do I need to inject these symbols as part of the project configuration? Seems easy enough to do since I'll know which framework is being targeted from msbuild. I think I've seen that NET_40 symbol isn't defined? If so I think I could do this? #if !NET_35 && !NET_20 #define NET_40 #endif Or do I need to define it in the msbuild command: /p:DefineConstants="NET_40"

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• iPhone/Cocoa Coding Standards

  - by greypoint

  Are there any generally-accepted coding standards (naming, casting etc) that apply specifically to iPhone/Cocoa/Objective-C? I know Microsoft has published similar standards as they relate to .Net and C# but haven't run across anything related to the iPhone world.

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• Fiscal year handling strategies in database design

  - by Sapphire

  By fiscal year I mean all the data in the database (in all tables) that occurred in the particular year. Lets say that we are building an application that allows user to choose from different years. What way of implementing this would you prefer, and why: Separate fiscal year data based on multiple separate database instances (for example, on every fiscal year start you could create a new instance with no data) Have everything in one database, but with logic that automatically separates records from different years. Personally, I have "seen" both methods, and I would choose the second. The only argument I can think of for the first method is to have less records in case that these are really big databases - but still, you could "archive" old records by joining them in summaries or by some other way. What do you think?

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• Best way to migrate from IIS6 to IIS6

  - by Darko Romanov

  Hi, I need to move all my sites on a server with IIS 6 to another one, that has same OS (Windows Server 20003) and same IIS version. I'm trying to understand which is the best way to do it. Searching on Google I've found that there are at least 2 methods, one uses IIS Migration Tool, and another Web Deployment Tool. I don't know which method is best, it also seems that both methods can export one site at once, and I have about 100 sites hosted. What would you do?

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• [PHP] Making a good singleton registry class structure which hold your objects

  - by Saif Bechan

  I am working on a web application in PHP. I have a singleton class called registry. This class will hold all the objects i need throughout my application, such as loader classes, template classes, database, classes, etc. When an object of the registry class is created I send it an array with the classes it need to load: // Create the registry $registry = registry::singleton(); // Store those core objects $registry->storeObjects(Array('session','db','page','template','errors')); In this example I only put some of the classes, to get the basic idea. Now I have some classes in the registry that use each other. For example the 'errors' object uses the 'page' object. Now I was wondering if it is a good practice to make an instance of the registry object in the errors object. Like this; class errors{ private $registry; public function __construct(){ $this->registry = registry::singleton(); } } So there is an instance of the registry object, inside an object of the registry object. This does not sound like a good idea to me. Anyone have a suggestion how to model such a thing?

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• Using String+string+string vs using string.replace

  - by Madi D.

  A colleague told me that using the following method: string url = "SomeURL"; string ext = "SomeExt"; string sub = "SomeSub"; string subSub = "moreSub"; string Url = @"http://www." + Url +@"/"+ ext +@"/"+ sub + subSub; is not efficenet (takes more resources) and it is preferred to use the following method: string Url = @"http://www.#URL.#EXT/#sub/#subSub"; string url = "SomeURL"; string ext = "SomeExt"; string sub = "SomeSub"; string subSub = "moreSub"; Url.Replace("#URL",url) Url.Replace("#EXT",ext); Url.Replace("#sub",sub); Url.Replace("#subSub",subSub); Is that true? and what is the explanation behind it?

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• What is the standard convention for defining nested view:viewmodel mapping in MVVM Light

  - by firoso

  so in classic MVVM examples ive seen DataTemplate definitions are used to map up View Models to Views, what is the standard way to do this in MVVM Light framework, and where should the mappings be located? Following are examples of what I'm doing now and what I'm talking about, blendability is important to me! Main Window: <Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d" x:Class="STS2Editor.MainWindow" Title="{Binding ApplicationTitle, Mode=OneWay}" DataContext="{Binding RootViewModel, Source={StaticResource Locator}}"> <Window.Resources> <ResourceDictionary> <ResourceDictionary.MergedDictionaries> <ResourceDictionary Source="Skins/ApplicationSkin.xaml" /> <ResourceDictionary Source="Resources/ViewMappings.xaml" /> </ResourceDictionary.MergedDictionaries> </ResourceDictionary> </Window.Resources> <Grid> <ContentControl Content="{Binding ApplicationManagementViewModel}" HorizontalAlignment="Left" VerticalAlignment="Top"/> </Grid> </Window> In the above code, my RootViewModel class has an instance of the class ApplicationManagementViewModel with the same property name: public ApplicationManagementViewModel ApplicationManagementViewModel {get {...} set {...} } I reference the ResourceDictionary "ViewMappings.xaml" to specify how my view model is represented as a view. <ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="clr-namespace:STS2Editor.ViewModel"> <DataTemplate DataType="{x:Type local:ApplicationManagementViewModel}"> <local:ApplicationManagementView/> </DataTemplate> </ResourceDictionary> should I be doing things like this using ViewModelLocator? what about collections of view models?

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• How to integrate KVC in MVC?

  - by Paperflyer

  So I have an MVC-application in Cocoa. There are some custom views, a controller and a model. Of course, the views need to know some stuff, so they get their data from the controller. However, they do not use accessors in the controller, they use KVC with a keypath that calls right through to the model: // In view.m time = [timeSource valueForKeyPath:@"theModel.currentTime"]; // timeSource is a pseudo-delegate of the view that holds the controller This simplifies things a great deal and technically, the views still don't know the model in person (that is, in pointer). But of course, they access it directly. Is that a usual (or at least sensible) usage of KVC and MVC? Or how would you implement this kind of communication?

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• Subjective question...would you use the Action delegate to avoid duplication of code?

  - by Seth Spearman

  Hello, I just asked a question that helps about using generics (or polymorphism) to avoid duplication of code. I am really trying to follow the DRY principle. So I just ran into the following code... Sub OutputDataToExcel() OutputLine("Output DataBlocks", 1) OutputDataBlocks() OutputLine("") OutputLine("Output Numbered Inventory", 1) OutputNumberedInventory() OutputLine("") OutputLine("Output Item Summaries", 1) OutputItemSummaries() OutputLine("") End Sub Should I rewrite this code to be as follows using the Action delegate... Sub OutputDataToExcel() OutputData("Output DataBlocks", New Action(AddressOf OutputDataBlocks)) OutputData("Output Numbered Inventory", New Action(AddressOf OutputNumberedInventory)) OutputData("Output Item Summaries", New Action(AddressOf OutputItemSummaries)) End Sub Sub OutputData(ByVal outputDescription As String, ByVal outputType As Action) OutputLine(outputDescription, 1) outputType() OutputLine("") End Sub I realize this question is subjective. I am just wondering about how religiously you follow DRY. Would you do this? Seth

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• How do I MVVM-ize this MouseDown code in my WPF 3D app?

  - by DanM

  In my view, I have: <UserControl x:Class ... MouseDown="UserControl_MouseDown"> <Viewport3D Name="Viewport" Grid.Column="0"> ... </Viewport3D > </UserControl> In my code-behind, I have: private void UserControl_MouseDown(object sender, MouseButtonEventArgs e) { ((MapPanelViewModel)DataContext).OnMouseDown(e, Viewport); } And in my view-model, I have: public void OnMouseDown(MouseEventArgs e, Viewport3D viewport) { var range = new LineRange(); var isValid = ViewportInfo.Point2DtoPoint3D(viewport, e.GetPosition(viewport), out range); if (!isValid) MouseCoordinates = "(no data)"; else { var point3D = range.PointFromZ(0); var point = ViewportInfo.Point3DtoPoint2D(viewport, point3D); MouseCoordinates = e.GetPosition(viewport).ToString() + "\n" + point3D + "\n" + point; } } I really don't have a good sense of how to handle mouse events with MVVM. I always just end up putting them in the code-behind and casting the DataContext as SomeViewModel, then passing the MouseEventArgs on to a handler in my view-model. That's bad enough already, but in this case, I'm actually passing in a control (a Viewport3D), which is necessary for translating coordinates between 2D and 3D. Any suggestions on how to make this more in tune with MVVM?

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• Best aproach for multi-page WPF application

  - by 0xDEAD BEEF

  How do i create multislide application in WPF? What is beast approach? What i need is something very similar to having tabcontrol with multiple pages and navigation buttons bellow, but i dont think that tab control is best for this task. I would like to have each view to be in seperate .xaml + class file. AND- it would be cool to have some animiation, when navigating to another page (like old page slides away or something like that. What would be best technique to achieve this?

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• [Principles] Concrete Type or Interface for method return type?

  - by SDReyes

  In general terms, whats the better election for a method's return type: a concrete type or an interface? In most cases, I tend to use concrete types as the return type for methods. because I believe that an concrete type is more flexible for further use and exposes more functionality. The dark side of this: Coupling. The angelic one: A concrete type contains per-se the interface you would going to return initially, and extra functionality. What's your thumb's rule? Is there any programming principle for this? BONUS: This is an example of what I mean http://stackoverflow.com/questions/491375/readonlycollection-or-ienumerable-for-exposing-member-collections

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