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• Silverlight Cream for February 02, 2011 -- #1039

  - by Dave Campbell

  In this Issue: Tony Champion, Gill Cleeren, Alex van Beek, Michael James, Ollie Riches, Peter Kuhn, Mike Ormond, WindowsPhoneGeek(-2-), Daniel N. Egan, Loek Van Den Ouweland, and Paul Thurott. Above the Fold: Silverlight: "Using the AutoCompleteBox" Peter Kuhn WP7: "Windows Phone Image Button" Loek Van Den Ouweland Training: "New WP7 Virtual Labs" Daniel N. Egan Shoutouts: SilverlightShow has their top 5 most popular news articles up: SilverlightShow for Jan 24-30, 2011 Rudi Grobler posted answers he gives to questions about Silverlight - Where do I start? Brian Noyes starts a series of Webinars at SilverlightShow this morning at 10am PDT: Free Silverlight Show Webinar: Querying and Updating Data From Silverlight Clients with WCF RIA Services Join your fellow geeks at Gangplank in Chandler Arizona this Saturday as Scott Cate and AZGroups brings you Azure Boot Camp – Feb 5th 2011 From SilverlightCream.com: Deploying Silverlight with WCF Services Tony Champion takes a step out of his norm (Pivot) and has a post up about deploying WCF Services with your SL app, and how to take the pain out of that without pulling out your hair. Getting ready for Microsoft Silverlight Exam 70-506 (Part 3) Gill Cleeren's part 3 of getting ready for the Silverlight Exam is up at SilverlightShow... with links to the first two parts. There's so much good information linked off these... thanks Gill and 'The Show'! A guide through WCF RIA Services attributes Alex van Beek has a post up you will probably want to bookmark unless you're not using WCF RIA... do you know all the attributes by heart? ... how about an excellent explanation of 10 of them? Using DeferredLoadListBox in a Pivot Control Michael James discusses using the DeferredLoadListBox, and then also using it with the Pivot control... but not without some pain points which he defines and gives the workaround for. WP7: Know your data Ollie Riches' latest is about Data and WP7 ... specifically 'knowing' what data you're needing/using to avoid the 90MB memory limit... He gives a set of steps to follow to measure your data model to avoid getting in trouble. Using the AutoCompleteBox Peter Kuhn takes a great look at the AutoCompleteBox... the basics, and then well beyond with custom data, item templates, custom filters, asynchronous filtering, and a behavior for MVVM async filtering. OData and Windows Phone 7 Part 2 Mike Ormond has part 2 of his OData/WP7 post up... lashing up the images to go along with the code this time out... nice looking app. WP7 RoundToggleButton and RoundButton in depth WindowsPhoneGeek is checking out the RoundToggleButton and RoundButton controls from the Coding4fun Toolkit in detail... of course where to get them, and then the setup, demo project included. All about Dependency Properties in Silverlight for WP7 WindowsPhoneGeek's latest post is a good dependency-property discussion related to WP7 development, but if you're just learning, it's a good place to learn about the subject. New WP7 Virtual Labs Daniel N. Egan posted links to 6 new WP7 Virtual Labs released on 1/25. Windows Phone Image Button Loek Van Den Ouweland has a style up on his blog that gives you an imageButton for your WP7 apps, and a sweet little video showing how it's done in Expression Blend too. Yet another free Windows Phone book for developers Paul Thurott found a link to another Free eBook for WP7 development. This one is by Puja Pramudya and is an English translation of the original, and is an introductory text, but hey... it's free... give it a look! Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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• Silverlight Cream for May 11, 2010 -- #859

  - by Dave Campbell

  In this All Submittal Issue: Colin Eberhardt, Ken Johnson, Alan Beasley, Pencho Popadiyn, Phil Middlemiss, Khawar(-2-), Levente Mihály, Alex van Beek, Bart Czernicki, Michael Washington, and Mark Monster. Shoutout: Not Silverlight necessarily, but definitely VS2010, read what Brett Balmer has to say In Defense of Portrait Mode From SilverlightCream.com: Silverlight MultiBinding solution for Silverlight 4 Colin Eberhardt updated his Silverlight Multibinding solution to Silverlight 4. Great article with explanatory graphics, and links to the code... congrats on the use in the FaceBook Client too! Spirograph Shapes: WPF Bezier shapes from math formulae Wow... I haven't seen this much math since my Master's Thesis! ... Check out all the shapes Ken Johnson has built... don't let the math scare you... just use it :) Busy Dizzy Bee-sley Spirographic Animation in Expression Blend and Silverlight This is just fun... I saw Michael Washington playing with this yesterday at the Arizona Day of .NET but didn't have a chance to ask what it was.. Alan Beasley had a good time building this, and is sharing a very detailed tutorial with us. ModalDialogs, IEditableObject and MVVM in Silverlight 4 Pencho Popadiyn said the 'M' word over at SilverlightShow... actually the 'MVVM' word :) ... he's discussing Modal dialogs with no code in the View ... check out how he did it. A Chrome and Glass Theme - Part 6 Phil Middlemiss is up to episode 6 in his Theme-building tutorial... this time out, he's giving the TabControl and TabItem new clothes ... specifically discussing what to change and what to allow to inherit ... good stuff! Silverlight 4 Fonts gotcha Check out Khawar's ATM Machine demo -- there's a link on the page for this post... he had an issue with fonts, ratted it out, and explains it for all of us... thanks Khawar Demystifying Silverlight Obfuscation Khawar also has a good post up on Obfuscating your Silverlight... definitely showing that it's not all that difficult to do. geoGallery, a WinPhone7 sample OK this is interesting... using the geoLocation feature of WP7, Levente Mihály hits Google Picasa to find pictures... good write-up and all the code. Silverlight 4: Digitally signing a XAP with Visual Studio 2010 Alex van Beek has a nice tutorial on Signing your XAP file using Visual Studio 2010... of course you may want to visit Tim Heuer's blog (search at SC) to find the two good deals on certificates that are still in play. Creating Key Performance Indicators (KPIs) in Expression Blend 4 for Business Intelligence applications In an interesting post, Bart Czernicki describes using the shape assets in Blend 4 to produce a KPI display in Silverlight or WPF. A discussion of the shape's evolution for KPI is included as well as some alternate shape uses. A DotNetNuke Silverlight 4 Drag and Drop File Manager Michael Washington has blogged about his Drag and Drop File Manager using the View Model Style pattern. This is covered in two CodeProject articles listed in the post. The design work was done by Alan Beasely and links to his work is there as well as covered in other SC posts. How to select a ListItem on Hover Mark Monster had a Use Case for Selecting a ListBox entry by hovering ... but he did it with a Behavior and for a ListBox and PathListBox and it works with DataBinding... Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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• Columbus Regional Airport Authority Cuts Unbudgeted Carryover Costs for Capital Projects by 88% in One Year

  - by Melissa Centurio Lopes

  Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} The Columbus Regional Airport Authority (CRAA) is a public entity that works to connect Central Ohio with the world. It oversees operations at three airports?Port Columbus International Airport, Rickenbacker International Airport, and Bolton Field Airport?and manages the Rickenbacker Inland Port and Foreign Trade Zone # 138. It was created in 2002 through the merger of the Columbus Airport Authority and Rickenbacker Port Authority. CRAA manages approximately 100 projects annually, including initiatives as diverse as road and runway construction and maintenance, terminal improvements, construction of a new air traffic control tower, technology infrastructure development, customer service projects, and energy conservation programs. CRAA deployed Oracle’s Primavera P6 Enterprise Project Portfolio Management to create a unified methodology for scheduling and capital cash flow management. Today, the organization manages schedules and costs for all of its capital projects by using Primavera to provide enterprise wide visibility. As a result, CRAA cut unbudgeted carryover costs from US$24.4 million in 2010 to US$3.5 million in 2011?an 88% improvement. "Oracle’s Primavera P6 and Primavera Contract Management are transforming project management at CRAA. We have enabled resource-loaded scheduling and expanded visibility into cash flow, which allowed us to reduce unbudgeted carryover by 88% in a single year.” – Alex Beaver, Manager, Project Controls Office, Columbus Regional Airport Authority Challenges Standardize project planning and management for the approximately 100 projects?including airport terminal upgrades to road and runway creation and rehabilitation?that the airport authority undertakes annually Improve control over project scheduling and budgets to reduce unplanned carryover costs from one fiscal year to the next Ensure on-time, on-budget completion of critical infrastructure projects that support the organization’s mission to connect Central Ohio with the world through its three airports and inland port Solutions · Used Primavera P6 Enterprise Project Portfolio Management to develop a unified methodology for scheduling and managing capital projects for the airport authority, including the organization’s largest capital project ever?a five-year runway construction project · Gained a single, consolidated view into the organization’s capital projects and the ability to drill down into resource-loaded schedules and cash flow, enabling CRAA to take action earlier to avert the impact of emerging issues?including budget overages and project delays · Cut unbudgeted carryover costs from US$24.4 million in 2010 to US$3.5 million in 2011?an 88% improvement Click here to view all of the solutions. “Oracle’s Primavera solutions are the industry standard for project management. They provide robust and proven functionality that give us the power to effectively schedule and manage budgets for a wide range of projects, from terminal maintenance, to runway work, to golf course redesign,” said Alex Beaver, manager, project controls office, Columbus Regional Airport Authority. Click here to read the full version of the customer success story.

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• XML Serialization in C# without XML attribute nodes

  - by Alex Marshall

  Hello, I have an XML document format from a legacy system that I have to support in a future application. I want to be able to both serialize and deserialize the XML between XML and C# objects, however, using the objects generated by xsd.exe, the C# serialization includes the xmlns:xsi..., xsi:... etc XML attributes on the root element of the document that gets generated. Is there anyway to disable this so that absolutely no XML attribute nodes get put out in the resulting XML ? The XML document should be elements only. Duplicate? XmlSerializer: remove unnecessary xsi and xsd namespaces

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• Can't connect to local IP address on OSX

  - by Alex Worden

  I'm trying to connect to a webserver that's running on my mac OSX 1.6. I'm able to connect to it locally using http://127.0.0.1:8888/myapp but when I attempt to connect to it using my machine's local IP address (http://192.168.1.15:8888/myapp IP shown below) from the same machine (or another on the network) I cannot connect. I can ping the LAN IP address. I've tried adding IP forwarding to my router for port 8888 but it didn't help. I've checked and the OSX firewall is disabled Can anyone suggest what else is blocking the connection? Here's what I get when I run ifconfig: ~ :ifconfig lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384 inet6 ::1 prefixlen 128 inet6 fe80::1%lo0 prefixlen 64 scopeid 0x1 inet 127.0.0.1 netmask 0xff000000 gif0: flags=8010<POINTOPOINT,MULTICAST> mtu 1280 stf0: flags=0<> mtu 1280 en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500 ether 00:1f:5b:e8:16:4d media: autoselect status: inactive supported media: autoselect 10baseT/UTP <half-duplex> 10baseT/UTP <full-duplex> 10baseT/UTP <full-duplex,hw-loopback> 10baseT/UTP <full-duplex,flow-control> 100baseTX <half-duplex> 100baseTX <full-duplex> 100baseTX <full-duplex,hw-loopback> 100baseTX <full-duplex,flow-control> 1000baseT <full-duplex> 1000baseT <full-duplex,hw-loopback> 1000baseT <full-duplex,flow-control> none en1: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500 inet6 fe80::21e:c2ff:febf:4809%en1 prefixlen 64 scopeid 0x5 inet 192.168.1.15 netmask 0xffffff00 broadcast 192.168.1.255 ether 00:1e:c2:bf:48:09 media: autoselect status: active supported media: autoselect fw0: flags=8802<BROADCAST,SIMPLEX,MULTICAST> mtu 4078 lladdr 00:1f:5b:ff:fe:2b:b3:3c media: autoselect <full-duplex> status: inactive supported media: autoselect <full-duplex> en5: flags=8822<BROADCAST,SMART,SIMPLEX,MULTICAST> mtu 1500 ether 00:1e:c2:8e:0f:45 media: autoselect status: inactive supported media: none autoselect 10baseT/UTP <half-duplex> en2: flags=8922<BROADCAST,SMART,PROMISC,SIMPLEX,MULTICAST> mtu 1500 ether 00:1c:42:00:00:00 media: autoselect status: inactive supported media: autoselect en3: flags=8922<BROADCAST,SMART,PROMISC,SIMPLEX,MULTICAST> mtu 1500 ether 00:1c:42:00:00:01 media: autoselect status: inactive supported media: autoselect

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• com.jcraft.jsch.JSchException: UnknownHostKey

  - by Alex

  I don't know how SSH works and I think that's a simple question. How do I fix that exception: com.jcraft.jsch.JSchException: UnknownHostKey: mywebsite.com. RSA key fingerprint is 22:fb:ee:fe:18:cd:aa:9a:9c:78:89:9f:b4:78:75:b4 I know I should verify that key or something, but there is like zero documentation for Jsch. Here is my code it's really straightforward: import com.jcraft.jsch.JSch; import com.jcraft.jsch.Session; public class ssh{ public static void main(String[] arg){ try{ JSch jsch = new JSch(); //create SSH connection String host = "mywebsite.com"; String user = "username"; String password = "123456"; Session session = jsch.getSession(user, host, 22); session.setPassword(password); session.connect(); } catch(Exception e){ System.out.println(e); } } }

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• Visual studio 2010 remote debugging is very slow (across domains, over vpn)

  - by alex

  Overall debugging works, but each step through code takes dosens of seconds. I've already closed all additional windows like stack trace,watches,autos; deleted all breakpoints. server and dev machine are located in different domains, so i set up local user on both, with matching password. remote debugger is running as service. looking at security log, I found quite a lot of entries about remote debugging account logging in (record about every minute). Any suggestions on how i can speed up remote debugging? dev computer: quad core, 8 Gb mem, win 7 x64 , visual studio 2010 ultimate target server: asp.net website , 2xdual core xeon, 2Gb mem, remote debugger 2010 communication channel: vpn , 5 mbit , latency about 20ms. (seems that debbugging never uses more than 20 kb/s)

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• Is there a 'has focus' in JavaScript (or jQuery)?

  - by alex

  Is there something I can do like this (perhap via a plugin) if ( ! $('form#contact input]').hasFocus()) { $('form#contact input:first]').focus(); } Basically, set focus to the first input, but only if the user has not already clicked into anything? I know this will work too, but is there anything more elegant? $(function() { var focused = FALSE: $('form#contact input]').focus(function() { focused = TRUE; }); setTimeout(function() { if ( ! focused) { $('form#contact input:first]').focus(); }; }, 500); });

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• Change font size macvim?

  - by Alex

  Hi there, I'm using macvim and I love it. I also happen to really like the default font. My question is: How do I change the font size in my .gvimrc? I want it to be bigger, without changing the font from the default. All the examples I've seen specify a font then a ':' then the size. So how do I just change the size not the font itself? Thanks!

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• WPF MediaElement source in C# 2010

  - by Alex Farber

  The sample from the book is compiled and executed successfully in VS2008. Project contains file Bear.wmw in the project directory. XAML: MediaElement Source="Bear.wmv" Build Action = Content, Copy to output directory = Copy always In C# 2008 this file is shown in the window. In C# 2010 Express file is not shown. Output directory contains this file. How can this be fixed?

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• Set caret position in contenteditable div layer in Chrome/webkit

  - by Alex

  Hello, I'm trying to set the caret position in a contenteditable div layer, and after a bit of searching the web and experimenting I got it to work in firefox using this: function set(element,position){ element.focus(); var range= window.getSelection().getRangeAt(0); range.setStart(element.firstChild,position); range.setEnd(element.firstChild,position); } [...] set(document.getElementById("test"),3); But in Chrome/webkit it selects all of the content in the div. Is this a bug with webkit or am I doing something wrong? Thank you in advance.

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• WPF zoom canvas and maintain scroll position

  - by Alex McBride

  I have a Canvas element, contained within a ScrollViewer, which I'm zooming using ScaleTransform. However, I want to be able to keep the scroll position of the viewer focused on the same part of the canvas after the zoom operation has finished. Currently when I zoom the canvas the scroll position of the viewer stays where it was and the place the user was viewing is lost. I'm still learning WPF, and I've been going backwards and forwards a bit on this, but I can't figure out a nice XAML based way to accomplish what I want. Any help in this matter would be greatly appreciated and would aid me in my learning process. Here is the kind of code I'm using... <Grid> <ScrollViewer Name="TrackScrollViewer" HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto"> <Canvas Width="2560" Height="2560" Name="TrackCanvas"> <Canvas.LayoutTransform> <ScaleTransform ScaleX="{Binding ElementName=ZoomSlider, Path=Value}" ScaleY="{Binding ElementName=ZoomSlider, Path=Value}"/> </Canvas.LayoutTransform> <!-- Some complex geometry describing a motor racing circuit --> </Canvas> </ScrollViewer> <StackPanel Orientation="Horizontal" Margin="8" VerticalAlignment="Top" HorizontalAlignment="Left"> <Slider Name="ZoomSlider" Width="80" Minimum="0.1" Maximum="10" Value="1"/> <TextBlock Margin="4,0,0,0" VerticalAlignment="Center" Text="{Binding ElementName=ZoomSlider, Path=Value, StringFormat=F1}"/> </StackPanel> </Grid>

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• How to manually check a YUI radio "button".

  - by alex

  <script type="text/javascript"> (function () { var ButtonGroup = YAHOO.widget.ButtonGroup; var onCheckedButtonChange = function (p_oEvent) { }; YAHOO.util.Event.onContentReady("mediaFilterButtonsFieldset", function () { var oButtonGroup = new ButtonGroup("mediaFilterButtons"); oButtonGroup.on("checkedButtonChange", onCheckedButtonChange); }); }()); </script> <div id="resultInfo"> <form id="button-example-form" name="button-example-form" method="post"> <fieldset id="mediaFilterButtonsFieldset"> <div id="mediaFilterButtons" class="yui-buttongroup ie7filter" style="z-index:11;"> <div id="mediaFilterLabel">Go to</div> <input id="radio1" class="filter_but" type="radio" name="0" value="First" checked rel="0" > <input id="radio2" class="filter_but" type="radio" name="2" value="Second" rel="2"> <input id="radio3" class="filter_but" type="radio" name="1" value="Third" rel="1"> </div> </fieldset> </form> </div> These are my YUI buttons. They're just 3 radio buttons turned into "buttons"--literally. My question is this: After people click the third button, I cannot manually check the first button anymore. How can I manually check "radio1"? I tried JQuery: $("#radio1").attr("checked",true); But this didn't work. The third button still remained pressed down.

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• c#Repository pattern: One repository per subclass?

  - by Alex

  I am wondering if you would create a repository for each subclass of a domain model. There are two classes for example: public class Person { public virtual String GivenName { set; get; } public virtual String FamilyName { set; get; } public virtual String EMailAdress { set; get; } } public class Customer : Person { public virtual DateTime RegistrationDate { get; set; } public virtual String Password { get; set; } } Would you create both a PersonRepository and a CustomerRepository or just the PersonRepository which would also be able to execute Customer related queries?

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• VSS 2005 and VS 2005

  - by Alex

  I use VS 2005 and VSS 2005. Every time I close VS I get error: ss.ini not found. But except this VSS works fine, no problems when I open VS and do check in and check out. ss.ini is present and VSS repository specified as network path. I just worry that I can have problems later.

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• How to change image and disable UIBarButtonItem

  - by Alex

  I have a NavigationBar app with two views: a parent and a sub view. In the sub view I'm adding a button to the right corner as follows: - (void)viewDidLoad { UIBarButtonItem *tempButton = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"lock-unlocked.png"] style:UIBarButtonItemStylePlain target:self action:@selector(lockScreen)]; self.navigationItem.rightBarButtonItem = tempButton; [tempButton release]; } When that button is clicked I want to change the image of this rightBarButtonItem and disable the leftBarButtonItem (which was added automatically by the controller). Basically have two states of a button, locked and unlocked. Question 1: The only way I can find how to change the image is to create a new UIButtonItem with a new image and replace rightBarButtonItem with that new one. But I'm wondering if there's a way to just change the image without creating a new UIBarButtonItem. Am I creating a memory leak if I keep creating new UIBarButtonItem? Question 2: How can I get a hold of self.navigationItem.leftBarButtonItem and disable/enable it? I don't create that one manually, it's created automatically for me by the controller. I don't see any method/property on UIBarButtonItem to enable/disable user interaction with it.

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• SAT Thread and Process output capture in c#

  - by alex

  Hi: This is a strange problem I encountered. I have an window application written in c# to do testing. It has a MDI parent form that is hosting a few children forms. One of the forms launch test cripts by creating processes and capture the scripts output to a text box. Another form open serial port and monitoring the status of the device I am working on(like a shell). If I ran both of them together, the output of the script seems only appear in the text box after the test is done. However, If I don't open the serial port form, the output of the script is captured in real time. Does anyone knows what's causing the problem? I notice the onDataReceived even handler for serial port form has a [SAThread] header to it. Will this cause the serial port thread having higher priority than other processes? Thanks in advance.

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• Maven freezes while perfoming scm:update on VSS

  - by Alex

  Im trying to get source files from VSS using Maven. But when I execute command mvn -DvssDirectory="C:\Program Files\VisualSourceSafe\win32" scm:update the log goes to [INFO] [scm:update {execution: default-cli}] [INFO] Executing: cmd.exe /X /C ""C:\Program Files\VisualSourceSafe\win32\ss" Get $/TEST -R -I- -GWS" [INFO] Working directory: C:\temp\test and then nothing happens. No error, no success. Can someone advice how to proceed with downloading sources from VSS?

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• Intelligencia URL ReWriter mapping with regex

  - by alex

  I am using the Intelligencia URL rewriter in my asp.net web application. I use the web.config mappings I'm trying to map the following url: www.mydomain.com/product-deals/manufacturer-model_PRODUCTId.aspx To: www.mydomain.com/ProductInfo.aspx?productID=xxx obviously in the above example, xxx is replaced from the "productId" from the "friendly" url. In my web.config, I've got so far: <rewrite url="~/contract-deals/([\w-_]+)/_(.+).aspx" to="~/ProductInfo.aspx?productId=$1"/> This isn't working however. I need the correct regex to use for my requirements (regex really isn't my strong point!!)

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• SQLite file locking and DropBox

  - by Alex Jenter

  I'm developing an app in Visual C++ that uses an SQLite3 DB for storing data. Usually it sits in the tray most of the time. I also would like to enable putting my app in a DropBox folder to share it across several PCs. It worked really well up until DropBox has recently updated itself. And now it says that it "can't sync the file in use". The SQLite file is open in my app, but the lock is shared. There are some prepared statements, but all are reset immediately after using step. Is there any way to enable synchronizing of an open SQLite database file? Thanks! Here is the simple wrapper that I use just for testing (no error handling), in case this helps: class Statement { private: Statement(sqlite3* db, const std::wstring& sql) : db(db) { sqlite3_prepare16_v2(db, sql.c_str(), sql.length() * sizeof(wchar_t), &stmt, NULL); } public: ~Statement() { sqlite3_finalize(stmt); } public: void reset() { sqlite3_reset(stmt); } int step() { return sqlite3_step(stmt); } int getInt(int i) const { return sqlite3_column_int(stmt, i); } tstring getText(int i) const { const wchar_t* v = (const wchar_t*)sqlite3_column_text16(stmt, i); int sz = sqlite3_column_bytes16(stmt, i) / sizeof(wchar_t); return std::wstring(v, v + sz); } private: friend class Database; sqlite3* db; sqlite3_stmt* stmt; }; class Database { public: Database(const std::wstring& filename = L"")) : db(NULL) { sqlite3_open16(filename.c_str(), &db); } ~Database() { sqlite3_close(db); } void exec(const std::wstring& sql) { auto_ptr<Statement> st(prepare(sql)); st->step(); } auto_ptr<Statement> prepare(const tstring& sql) const { return auto_ptr<Statement>(new Statement(db, sql)); } private: sqlite3* db; };

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• object of type 'closure' is not subsettable - contradiction?

  - by Alex

  I'm writing a function to produce time series plots of stock prices. However, I'm getting the following error "Error in df[, 7] : object of type 'closure' is not subsettable" Here's an example of the function: plot.prices <- function(df) { require(ggplot2) g <- ggplot(df, aes(x= as.Date(Date, format= "%Y-%m-%d"), y= df[, 7])) + geom_point(size=1) # ... code not shown... g } And example data: spy <- read.csv(file= 'http://ichart.finance.yahoo.com/table.csv?s=SPY&d=11&e=1&f=2012&g=d&a=0&b=29&c=1993&ignore=.csv', header= T) plot.prices(spy) # produces error ggplot(spy, aes(x= as.Date(Date, format= "%Y-%m-%d"), y= spy[, 7])) + geom_point(size=1) ## does not produce error As you can see, the code is identical. I get an error if the call to ggplot() is INSIDE the function but not if the call to ggplot() is OUTSIDE the function. Anyone have any idea why the seeming contradiction?

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• Multitouch in Linux

  - by Alex Snet

  I have two questions: How to simulate touch event in linux. How to work with multitouch on Qt in Linux.

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• jax-ws on glassfish3 init method

  - by Alex

  Hi all, I've created simple jax-ws (anotated Java 6 class to web service) service and deploied it on glassfish v3. The web.xml <?xml version="1.0" encoding="ISO-8859-1"?> <web-app> <servlet> <servlet-name>MyServiceName</servlet-name> <description>Blablabla</description> <servlet-class>com.foo-bar.somepackage.TheService</servlet-class> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>MyServiceName</servlet-name> <url-pattern>/MyServiceName</url-pattern> </servlet-mapping> <session-config> <session-timeout>30</session-timeout> </session-config> </web-app> There is no sun-jaxws.xml in the war. The service works fine but I have 2 issues: I'm using apache common configuration package to read my configuration, so i have init function that calls configuration stuff. 1. How can I configure init method for jaxws service (like i can do for the servlets for example) 2. the load on startup parameter is not affecting the service, I see that for every request init function called again (and c-tor). How can I set scope for my service? Thanks a lot,

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• Can Spring.Net function as PostSharp?

  - by Alex K

  A few months back I've discovered PostSharp, and for a time, it was good. But then legal came back with an answer saying that they don't like the licence of the old versions. Then the department told me that 2.0's price was unacceptably high (for the number of seats we need)... I was extremely disapponted, but not disheartened. Can't be the only such framework, I thought. I kept looking for a replacement, but most of it was either dead, ill maintained (especially in documentation department), for academic use, or all of the above (I'm looking at you Aspect.Net) Then I've discovered Spring.Net, and for a time, it was good. I've been reading the documentation and it went on to paint what seemed to be a supperior picture of an AOP nirvana. No longer was I locked to attributes to mark where I wanted code interception to take place, but it could be configured in XML and changes to it didn't require re-compile. Great. Then I looked at the samples and saw the following, in every single usage scenario: // Create AOP proxy using Spring.NET IoC container. IApplicationContext ctx = ContextRegistry.GetContext(); ICommand command = (ICommand)ctx["myServiceCommand"]; command.Execute(); if (command.IsUndoCapable) { command.UnExecute(); } Why must the first two lines of code exist? It ruins everything. This means I cannot simply provide a user with a set of aspects and attributes or XML configs that they can use by sticking appropriate attributes on the appropriate methods/classes/etc or editing the match pattern in XML. They have to modify their program logic to make this work! Is there a way to make Spring.Net behave as PostSharp in this case? (i.e. user only needs to add attributes/XML config, not edit content of any methods. Alternatively, is there a worthy and functioning alternative to PostSharp? I've seen a few question titled like this on SO, but none of them were actually looking to replace PostSharp, they only wanted to supplement its functionality. I need full replacement.

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• How do you construct an array suitable for numpy sorting?

  - by Alex

  I need to sort two arrays simultaneously, or rather I need to sort one of the arrays and bring the corresponding element of its associated array with it as I sort. That is if the array is [(5, 33), (4, 44), (3, 55)] and I sort by the first axis (labeled below dtype='alpha') then I want: [(3.0, 55.0) (4.0, 44.0) (5.0, 33.0)]. These are really big data sets and I need to sort first ( for nlog(n) speed ) before I do some other operations. I don't know how to merge my two separate arrays though in the proper manner to get the sort algorithm working. I think my problem is rather simple. I tried three different methods: import numpy x=numpy.asarray([5,4,3]) y=numpy.asarray([33,44,55]) dtype=[('alpha',float), ('beta',float)] values=numpy.array([(x),(y)]) values=numpy.rollaxis(values,1) #values = numpy.array(values, dtype=dtype) #a=numpy.array(values,dtype=dtype) #q=numpy.sort(a,order='alpha') print "Try 1:\n", values values=numpy.empty((len(x),2)) for n in range (len(x)): values[n][0]=y[n] values[n][1]=x[n] print "Try 2:\n", values #values = numpy.array(values, dtype=dtype) #a=numpy.array(values,dtype=dtype) #q=numpy.sort(a,order='alpha') ### values = [(x[0], y[0]), (x[1],y[1]) , (x[2],y[2])] print "Try 3:\n", values values = numpy.array(values, dtype=dtype) a=numpy.array(values,dtype=dtype) q=numpy.sort(a,order='alpha') print "Result:\n",q I commented out the first and second trys because they create errors, I knew the third one would work because that was mirroring what I saw when I was RTFM. Given the arrays x and y (which are very large, just examples shown) how do I construct the array (called values) that can be called by numpy.sort properly? *** Zip works great, thanks. Bonus question: How can I later unzip the sorted data into two arrays again?

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