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• Getting the name of a child class in the parent class (static context)

  - by Benoit Myard

  Hi everybody, I'm building an ORM library with reuse and simplicity in mind; everything goes fine except that I got stuck by a stupid inheritance limitation. Please consider the code below: class BaseModel { /* * Return an instance of a Model from the database. */ static public function get (/* varargs */) { // 1. Notice we want an instance of User $class = get_class(parent); // value: bool(false) $class = get_class(self); // value: bool(false) $class = get_class(); // value: string(9) "BaseModel" $class = __CLASS__; // value: string(9) "BaseModel" // 2. Query the database with id $row = get_row_from_db_as_array(func_get_args()); // 3. Return the filled instance $obj = new $class(); $obj->data = $row; return $obj; } } class User extends BaseModel { protected $table = 'users'; protected $fields = array('id', 'name'); protected $primary_keys = array('id'); } class Section extends BaseModel { // [...] } $my_user = User::get(3); $my_user->name = 'Jean'; $other_user = User::get(24); $other_user->name = 'Paul'; $my_user->save(); $other_user->save(); $my_section = Section::get('apropos'); $my_section->delete(); Obviously, this is not the behavior I was expecting (although the actual behavior also makes sense).. So my question is if you guys know of a mean to get, in the parent class, the name of child class.

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• Is it possible to include a Sexpr before the expression has been evaluated in Sweave / R ?

  - by PaulHurleyuk

  Hello, I'm writing a Sweave document, and I want to include a small section that details the R and package versions, platofrms and how long ti took to evalute the doucment, however, I want to put this in the middle of the document ! I was using a \Sexpr{elapsed} to do this (which didn't work), but thought if I put the code printing elapsed in a chunk that evaluates at the end, I could then include the chunk half way through, which also fails. My document looks something like this % \documentclass[a4paper]{article} \usepackage[OT1]{fontenc} \usepackage{longtable} \usepackage{geometry} \usepackage{Sweave} \geometry{left=1.25in, right=1.25in, top=1in, bottom=1in} \begin{document} <<label=start, echo=FALSE, include=FALSE>>= startt<-proc.time()[3] @ Text and Sweave Code in here % This document was created on \today, with \Sexpr{print(version$version.string)} running on a \Sexpr{print(version$platform)} platform. It took approx sec to process. <<>>= <<elapsed>> @ More text and Sweave code in here <<label=bye, include=FALSE, echo=FALSE>>= odbcCloseAll() endt<-proc.time()[3] elapsedtime<-as.numeric(endt-startt) @ <<label=elapsed, include=FALSE, echo=FALSE>>= print(elapsedtime) @ \end{document} But this doesn't seem to work (amazingly !) Does anyone know how I could do this ? Thanks Paul.

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• I need to speed up a function. Should I use cython, ctypes, or something else?

  - by Peter Stewart

  I'm having a lot of fun learning Python by writing a genetic programming type of application. I've had some great advice from Torsten Marek, Paul Hankin and Alex Martelli on this site. The program has 4 main functions: generate (randomly) an expression tree. evaluate the fitness of the tree crossbreed mutate As all of generate, crossbreed and mutate call 'evaluate the fitness'. it is the busiest function and is the primary bottleneck speedwise. As is the nature of genetic algorithms, it has to search an immense solution space so the faster the better. I want to speed up each of these functions. I'll start with the fitness evaluator. My question is what is the best way to do this. I've been looking into cython, ctypes and 'linking and embedding'. They are all new to me and quite beyond me at the moment but I look forward to learning one and eventually all of them. The 'fitness function' needs to compare the value of the expression tree to the value of the target expression. So it will consist of a postfix evaluator which will read the tree in a postfix order. I have all the code in python. I need advice on which I should learn and use now: cython, ctypes or linking and embedding. Thank you.

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• Sweave can't see a vector if run from a function ?

  - by PaulHurleyuk

  I have a function that sets a vector to a string, copies a Sweave document with a new name and then runs that Sweave. Inside the Sweave document I want to use the vector I set in the function, but it doesn't seem to see it. (Edit: I changed this function to use tempdir(() as suggested by Dirk) I created a sweave file test_sweave.rnw; % \documentclass[a4paper]{article} \usepackage[OT1]{fontenc} \usepackage{Sweave} \begin{document} \title{Test Sweave Document} \author{gb02413} \maketitle <<>>= ls() Sys.time() print(paste("The chosen study was ",chstud,sep="")) @ \end{document} and I have this function; onOK <- function(){ chstud<-"test" message(paste("Chosen Study is ",chstud,sep="")) newfile<-paste(chstud,"_report",sep="") mypath<-paste(tempdir(),"\\",sep="") setwd(mypath) message(paste("Copying test_sweave.Rnw to ",paste(mypath,newfile,".Rnw",sep=""),sep="")) file.copy("c:\\local\\test_sweave.Rnw", paste(mypath,newfile,".Rnw",sep=""), overwrite=TRUE) Sweave(paste(mypath,newfile,".Rnw",sep="")) require(tools) texi2dvi(file = paste(mypath,newfile,".tex",sep=""), pdf = TRUE) } If I run the code from the function directly, the resulting file has this output for ls(); > ls() [1] "chstud" "mypath" "newfile" "onOK" However If I call onOK() I get this output; > ls() [1] "onOK" and the print(...chstud...)) function generates an error. I suspect this is an environment problem, but I assumed because the call to Sweave occurs within the onOK function, it would be in the same enviroment, and would see all the objects created within the function. How can I get the Sweave process to see the chstud vector ? Thanks Paul.

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• How can I write a unit test to determine whether an object can be garbage collected?

  - by driis

  In relation to my previous question, I need to check whether a component that will be instantiated by Castle Windsor, can be garbage collected after my code has finished using it. I have tried the suggestion in the answers from the previous question, but it does not seem to work as expected, at least for my code. So I would like to write a unit test that tests whether a specific object instance can be garbage collected after some of my code has run. Is that possible to do in a reliable way ? EDIT I currently have the following test based on Paul Stovell's answer, which succeeds: [TestMethod] public void ReleaseTest() { WindsorContainer container = new WindsorContainer(); container.Kernel.ReleasePolicy = new NoTrackingReleasePolicy(); container.AddComponentWithLifestyle<ReleaseTester>(LifestyleType.Transient); Assert.AreEqual(0, ReleaseTester.refCount); var weakRef = new WeakReference(container.Resolve<ReleaseTester>()); Assert.AreEqual(1, ReleaseTester.refCount); GC.Collect(); GC.WaitForPendingFinalizers(); Assert.AreEqual(0, ReleaseTester.refCount, "Component not released"); } private class ReleaseTester { public static int refCount = 0; public ReleaseTester() { refCount++; } ~ReleaseTester() { refCount--; } } Am I right assuming that, based on the test above, I can conclude that Windsor will not leak memory when using the NoTrackingReleasePolicy ?

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• Web development scheme for staging and production servers using Git Push

  - by ServAce85

  I am using git to manage a dynamic website (PHP + MySQL) and I want to send my files from my localhost to my staging and development servers in the most efficient and hassle-free way. I am currently convinced that the best way for me to approach this problem is to use this git branching model to organize my local git repo. From there, I will use the release branches to push to my staging server for testing. Once I am happy that the release code works on the staging server, I can then merge with my master branch and push that to my production server. Pushing to Staging Server: As noted in many introductory git posts, I could run into problems pushing into a non-bare repo, so, as suggested in this response, I plan to push the release branch to a bare repo on the server and have a post-receive hook that clones the bare repo to a non-bare repo that also acts as the web-hosted directory. Pushing to Production Server: Here's my newest source of confusion... In the response that I cited above, it made me curious as to why @Paul states that it's a completely different story when pushing to a live, development server. I guess I don't see the problem. Would it be safe and hassle-free to follow the same steps as above, but for the master branch? Where are the potential pit-falls? Config Files: With respect to configuration files that are unique to each environment (.htaccess, config.php, etc), it seems simplest to .gitignore each of those files in their respective repos on their respective servers. Can you see anything immediately wrong with this? Better solutions? Accessing Data: Finally, as I initially stated, the site uses MySQL databases to store data. How would you suggest I access that data (for testing purposes) from the staging server and localhost? I realize that I may have asked way too many questions for a single post, but since they're all related to the best way to set up this development scheme, I thought it was necessary.

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• How to get the second sub element of every element in a list in R

  - by PaulHurleyuk

  I know I've come across this problem before, but I'm having a bit of a mental block at the moment. and as I can't find it on SO, I'll post it here so I can find it next time. I have a dataframe that contains a field representing an ID label. This label has two parts, an alpha prefix and a numeric suffix. I want to split it apart and create two new fields with these values in. structure(list(lab = c("N00", "N01", "N02", "B00", "B01", "B02", "Z21", "BA01", "NA03")), .Names = "lab", row.names = c(NA, -9L ), class = "data.frame") df$pre<-strsplit(df$lab, "[0-9]+") df$suf<-strsplit(df$lab, "[A-Z]+") Which gives lab pre suf 1 N00 N , 00 2 N01 N , 01 3 N02 N , 02 4 B00 B , 00 5 B01 B , 01 6 B02 B , 02 7 Z21 Z , 21 8 BA01 BA , 01 9 NA03 NA , 03 So, the first strsplit works fine, but the second gives a list, each having two elements, an empty string and the result I want, and stuffs them both into the dataframe column. How can I select the second sub-element from each element of the list ? (or, is there a better way to do this) Thanks Paul.

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• Convert a raw string to an array of big-endian words with Ruby

  - by Zag zag..

  Hello, I would like to convert a raw string to an array of big-endian words. As example, here is a JavaScript function that do it well (by Paul Johnston): /* * Convert a raw string to an array of big-endian words * Characters >255 have their high-byte silently ignored. */ function rstr2binb(input) { var output = Array(input.length >> 2); for(var i = 0; i < output.length; i++) output[i] = 0; for(var i = 0; i < input.length * 8; i += 8) output[i>>5] |= (input.charCodeAt(i / 8) & 0xFF) << (24 - i % 32); return output; } I believe the Ruby equivalent can be String#unpack(format). However, I don't know what should be the correct format parameter. Thank you for any help. Regards

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• Ruby and public_method_defined? : strange behaviour

  - by aXon

  Hi there Whilst reading through the book "The well grounded Rubyist", I came across some strange behaviour. The idea behind the code is using one's own method_missing method. The only thing I am not able to grasp is, why this code gets executed, as I do not have any Person.all_with_* class methods defined, which in turn means that the self.public_method_defined?(attr) returns true (attr is friends and then hobbies). #!/usr/bin/env ruby1.9 class Person PEOPLE = [] attr_reader :name, :hobbies, :friends def initialize(mame) @name = name @hobbies = [] @friends = [] PEOPLE << self end def has_hobby(hobby) @hobbies << hobby end def has_friend(friend) @friends << friend end def self.method_missing(m,*args) method = m.to_s if method.start_with?("all_with_") attr = method[9..-1] if self.public_method_defined?(attr) PEOPLE.find_all do |person| person.send(attr).include?(args[0]) end else raise ArgumentError, "Can't find #{attr}" end else super end end end j = Person.new("John") p = Person.new("Paul") g = Person.new("George") r = Person.new("Ringo") j.has_friend(p) j.has_friend(g) g.has_friend(p) r.has_hobby("rings") Person.all_with_friends(p).each do |person| puts "#{person.name} is friends with #{p.name}" end Person.all_with_hobbies("rings").each do |person| puts "#{person.name} is into rings" end The output is is friends with is friends with is into rings which is really understandable, as there is nothing to be executed.

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• What do you mean by the expressiveness in programming lanuguage?

  - by prosseek

  I see a lot of the word 'expressiveness' when people want to stress one language is better than the other. But I don't see exactly what they mean by it. Is it the verboseness/succinctness? I mean, if one language can write down something shorter than the other, does that mean expressiveness? Please refer to my other question - http://stackoverflow.com/questions/2411772/article-about-code-density-as-a-measure-of-programming-language-power Is it the power of the language? Paul Graham says that one language is more powerful than the other language in a sense that one language can do that the other language can't do (for example, LISP can do something with macro that the other language can't do). Is it just something that makes life easier? Regular expression can be one of the examples. Is it a different way of solving the same problem: something like SQL to solve the search problem? What do you think about the expressiveness of a programming lanuage? Can you show the expressiveness using some code? What's the relationship with the expressiveness and DSL? Do people come up with DSL to get the expressiveness?

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• Nokogiri changing custom elements

  - by dagda1

  Hi, I have sample html that I have marked up with some special tags that will be used by a different program, an example of the html is below. You should note the <START:organization>..<END> elements. <html> <head/> <body> <ul> <li> <START:organization> Advanced Integrated Pest Management <END> </li> <li> <START:organization> American Bakers Association <END> </li> </ul> </body> </html> I wanted to use nokogiri to preprocess the html to easily remove irrelevant tags like <script>. I created the following extension to the nokogiri document class: module Nokogiri module HTML class Document def prepare_html xpath("//script").remove to_html.remove_new_lines end end end end The problem is that nokogiri is changing the <START:organization> element to <organization>. Is there anyway that I can preserve the htnl to maintain my custom markup tags? Thanks Paul

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• Google Maps API v3 - infoWindows all have same content

  - by paulriedel

  Hello, I've been having problems with the infoWindows and Google Maps API v3. Initially, I've ran into the problem that everyone else has of closing infoWindows when opening a new one. I thought to have solved the problem by defining "infowindow" beforehand. Now they close when I click on a new marker, but the content is the same. How should I re-structure my code to make sure the content is the right one each time - and only one infoWindow is open at a given time? Thank you! Paul var allLatLngs = new Array(); var last = 0; var infowindow; function displayResults(start, count){ if(start === undefined){ start = last; } if(count === undefined){ count = 20; } jQuery.each(jsresults, function(index, value) { if(index >= start && index < start+count){ var obj = jQuery.parseJSON(value); $("#textresults").append(index + ": <strong>" + obj.name + "</strong> " + Math.round(obj.distanz*100)/100 + " km entfernt" + "<br/>"); var myLatlng = new google.maps.LatLng(obj.geo_lat, obj.geo_lon); allLatLngs.push(myLatlng); var contentString = '<strong>'+obj.name+'</strong>'; infowindow = new google.maps.InfoWindow({ content: contentString }); var marker = new google.maps.Marker({ position: myLatlng, //title:"Hello World!" }); marker.setMap(map); google.maps.event.addListener(marker, 'click', function() { if (infowindow) { infowindow.close(map,marker); } infowindow.open(map,marker); }); } }); last = start+count;

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• Can ScalaCheck/Specs warnings safely be ignored when using SBT with ScalaTest?

  - by pdbartlett

  I have a simple FunSuite-based ScalaTest: package pdbartlett.hello_sbt import org.scalatest.FunSuite class SanityTest extends FunSuite { test("a simple test") { assert(true) } test("a very slightly more complicated test - purposely fails") { assert(42 === (6 * 9)) } } Which I'm running with the following SBT project config: import sbt._ class HelloSbtProject(info: ProjectInfo) extends DefaultProject(info) { // Dummy action, just to show config working OK. lazy val solveQ = task { println("42"); None } // Managed dependencies val scalatest = "org.scalatest" % "scalatest" % "1.0" % "test" } However, when I runsbt test I get the following warnings: ... [info] == test-compile == [info] Source analysis: 0 new/modified, 0 indirectly invalidated, 0 removed. [info] Compiling test sources... [info] Nothing to compile. [warn] Could not load superclass 'org.scalacheck.Properties' : java.lang.ClassNotFoundException: org.scalacheck.Properties [warn] Could not load superclass 'org.specs.Specification' : java.lang.ClassNotFoundException: org.specs.Specification [warn] Could not load superclass 'org.specs.Specification' : java.lang.ClassNotFoundException: org.specs.Specification [info] Post-analysis: 3 classes. [info] == test-compile == For the moment I'm assuming these are just "noise" (caused by the unified test interface?) and that I can safely ignore them. But it is slightly annoying to some inner OCD part of me (though not so annoying that I'm prepared to add dependencies for the other frameworks). Is this a correct assumption, or are there subtle errors in my test/config code? If it is safe to ignore, is there any other way to suppress these errors, or do people routinely include all three frameworks so they can pick and choose the best approach for different tests? TIA, Paul. (ADDED: scala v2.7.7 and sbt v0.7.4)

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• Issue with class design to model user preferences for different classes

  - by Mulone

  Hi all, I'm not sure how to design a couple of classes in my app. Basically that's a situation: each user can have many preferences each preference can be referred to an object of different classes (e.g. album, film, book etc) the preference is expressed as a set of values (e.g. score, etc). The problem is that many users can have preferences on the same objects, e.g.: John: score=5 for filmid=apocalypsenow Paul: score=3 for filmid=apocalypsenow And naturally I don't want to duplicate the object film in each user. So I could create a class called "preference" holding a score and then a target object, something like: User{ hasMany preferences } Preference{ belongsTo User double score Film target Album target //etc } and then define just one target. Then I would create an interface for the target Classes (album, film etc): Interface canBePreferred{ hasMany preferences } And implement all of those classes. This could work, but it looks pretty ugly and it would requires a lot of joins to work. Do you have some patterns I could use to model this nicely? Cheers, Mulone

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• Border of single th spreads to neighboring th when colspan set on td row below

  - by Samuel Hapak

  Having following html code: <table> <tr><th>First</th><th class='second'>Second</th><th class='third'>Third</th><th>Fourth</th></tr> <tr><td>Mike</td><td colspan=2 >John</td><td>Paul</td></tr> </table>? And following css: table { border-collapse: collapse; } td, th { border: 1px black solid; } td { border-top: none; } th { border-bottom: none; } th.second { border-bottom: 3px green solid; } th.third { } ? I would expect as result one table with 3px solid green line below the second th cell. Instead of that in Chrome, I have solid green border below both the second and the third th cell. In the firefox, results are just as expected. Is this browser bug, or my code is illegal? You can see example at http://jsfiddle.net/tt6aP/3/ PS: Try to set th.third { border-bottom: 2px solid red; } And then try to raise it to 3px. This is even more strange. Screenshots Expected: Chrome: Firefox:

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• dojo.parser.parse only working first time it's called.

  - by crazymerlin

  I have a page that when a user clicks on a link for some reporting tools, it first asks them to enter some report parameters. I get the parameters dialog as a form using AJAX, based on the id of the link. Each dialog has some dojo controls on it, so I need to parse them when the dialog appears, because it is not originally part of the page. The first dialog when called works fine, but subsequent calls to dialogs fails to parse the dojo controls. Example: showParametersDialog : function(doc) { var content = doc.firstChild.firstChild.data; var container = document.createElement('div'); container.id = 'dialog'; container.innerHTML = content; container.style.background = 'transparent'; container.style.position = 'absolute'; container.style.top = (document.body.clientHeight / 2) - 124 + "px"; container.style.left = (document.body.clientWidth / 2) - 133 + "px"; container.style.display = 'block'; document.body.appendChild(container); // set up date fields var date_from = dojo.byId('date_from'); var date_to = dojo.byId('date_to'); try { date_from.value = dojo.date.locale.format(new Date(), {selector: 'date'}); date_to.value = dojo.date.locale.format(new Date(), {selector: 'date'}); } catch(e) { var now = new Date(); date_from.value = String(now.getMonth() + "/" + now.getDate() + "/" + now.getFullYear()); date_to.value = String(now.getMonth() + "/" + now.getDate() + "/" + now.getFullYear()); } dojo.parser.parse(); } All dialogs have the common date fields. So when I call this dialog the first time, and dojo.parser.parse() is called, it parses the controls on the dialog, but only the first time...after than, no dojo. Any thoughts? Thanks, Paul.

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• OpenGL Mipmapping: how does OpenGL decide on map level?

  - by Droozle

  Hi, I am having trouble implementing mipmapping in OpenGL. I am using OpenFrameworks and have modified the ofTexture class to support the creation and rendering of mipmaps. The following code is the original texture creation code from the class (slightly modified for clarity): glEnable(texData.textureTarget); glBindTexture(texData.textureTarget, (GLuint)texData.textureID); glTexSubImage2D(texData.textureTarget, 0, 0, 0, w, h, texData.glType, texData.pixelType, data); glTexParameteri(texData.textureTarget, GL_TEXTURE_MAG_FILTER, GL_LINEAR); glTexParameteri(texData.textureTarget, GL_TEXTURE_MIN_FILTER, GL_LINEAR); glDisable(texData.textureTarget); This is my version with mipmap support: glEnable(texData.textureTarget); glBindTexture(texData.textureTarget, (GLuint)texData.textureID); gluBuild2DMipmaps(texData.textureTarget, texData.glTypeInternal, w, h, texData.glType, texData.pixelType, data); glTexParameteri(texData.textureTarget, GL_TEXTURE_MAG_FILTER, GL_LINEAR_MIPMAP_LINEAR); glTexParameteri(texData.textureTarget, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR); glDisable(texData.textureTarget); The code does not generate errors (gluBuild2DMipmaps returns '0') and the textures are rendered without problems. However, I do not see any difference. The scene I render consists of "flat, square tiles" at z=0. It's basically a 2D scene. I zoom in and out by using "glScale()" before drawing the tiles. When I zoom out, the pixels of the tile textures start to "dance", indicating (as far as I can tell) unfiltered texture look-up. See: http://www.youtube.com/watch?v=b_As2Np3m8A at 25s. My question is: since I do not move the camera position, but only use scaling of the whole scene, does this mean OpenGL can not decide on the appropriate mipmap level and uses the full texture size (level 0)? Paul

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• How can I create dynamically updated views in a tab bar view, based on settings selection?

  - by Diggers

  Hi all, Noob question.... I've created a Tab Bar application. It has four tabs and works fine. Each view is created with a XIB and is effectively static. Each view takes user input and responds on screen. What I need to be able to do is change the input options the user have - in effect remove some UITextFields dependant upon which option the user selects in settings. I've created root.plist and created settings no problem i've also created additional XIBS for the altered UI, but what I don't know how to do, is call these into the tab view controller on demand. Effectively tab one has 3 possible views, tab two 3 possible views etc. But I only want the one that's relevant for the users settings selction to be displayed? Make sense? For reference, if we call the different views - UIInputViewA1, ...A2,....A3 UIInputViewB1,....B2....B3 etc. Hope someone can help, been trawling the net for nights trying to get my head round this. Beggining iPhone Development Bible doesn't help either. If you need any more info, please shout. Cheers Paul.

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• June 26th Links: ASP.NET, ASP.NET MVC, .NET and NuGet

  - by ScottGu

  Here is the latest in my link-listing series.  Also check out my Best of 2010 Summary for links to 100+ other posts I’ve done in the last year. [I am also now using Twitter for quick updates and to share links. Follow me at: twitter.com/scottgu] ASP.NET Introducing new ASP.NET Universal Providers: Great post from Scott Hanselman on the new System.Web.Providers we are working on.  This release delivers new ASP.NET Membership, Role Management, Session, Profile providers that work with SQL Server, SQL CE and SQL Azure. CSS Sprites and the ASP.NET Sprite and Image Optimization Library: Great post from Scott Mitchell that talks about a free library for ASP.NET that you can use to optimize your CSS and images to reduce HTTP requests and speed up your site. Better HTML5 Support for the VS 2010 Editor: Another great post from Scott Hanselman on an update several people on my team did that enables richer HTML5 editing support within Visual Studio 2010. Install the Ajax Control Toolkit from NuGet: Nice post by Stephen Walther on how you can now use NuGet to install the Ajax Control Toolkit within your applications.  This makes it much easier to reference and use. May 2011 Release of the Ajax Control Toolkit: Another great post from Stephen Walther that talks about the May release of the Ajax Control Toolkit. It includes a bunch of nice enhancements and fixes. SassAndCoffee 0.9 Released: Paul Betts blogs about the latest release of his SassAndCoffee extension (available via NuGet). It enables you to easily use Sass and Coffeescript within your ASP.NET applications (both MVC and Webforms). ASP.NET MVC ASP.NET MVC Mini-Profiler: The folks at StackOverflow.com (a great site built with ASP.NET MVC) have released a nice (free) profiler they’ve built that enables you to easily profile your ASP.NET MVC 3 sites and tune them for performance.  Globalization, Internationalization and Localization in ASP.NET MVC 3: Great post from Scott Hanselman on how to enable internationalization, globalization and localization support within your ASP.NET MVC 3 and jQuery solutions. Precompile your MVC Razor Views: Great post from David Ebbo that discusses a new Razor Generator tool that enables you to pre-compile your razor view templates as assemblies – which enables a bunch of cool scenarios. Unit Testing Razor Views: Nice post from David Ebbo that shows how to use his new Razor Generator to enable unit testing of razor view templates with ASP.NET MVC. Bin Deploying ASP.NET MVC 3: Nice post by Phil Haack that covers a cool feature added to VS 2010 SP1 that makes it really easy to \bin deploy ASP.NET MVC and Razor within your application. This enables you to easily deploy the app to servers that don’t have ASP.NET MVC 3 installed. .NET Table Splitting with EF 4.1 Code First: Great post from Morteza Manavi that discusses how to split up a single database table across multiple EF entity classes.  This shows off some of the power behind EF 4.1 and is very useful when working with legacy database schemas. Choosing the Right Collection Class: Nice post from James Michael Hare that talks about the different collection class options available within .NET.  A nice overview for people who haven’t looked at all of the support now built into the framework. Little Wonders: Empty(), DefaultIfEmpty() and Count() helper methods: Another in James Michael Hare’s excellent series on .NET/C# “Little Wonders”.  This post covers some of the great helper methods now built-into .NET that make coding even easier. NuGet NuGet 1.4 Released: Learn all about the latest release of NuGet – which includes a bunch of cool new capabilities.  It takes only seconds to update to it – go for it! NuGet in Depth: Nice presentation from Scott Hanselman all about NuGet and some of the investments we are making to enable a better open source ecosystem within .NET. NuGet for the Enterprise – NuGet in a Continuous Integration Automated Build System: Great post from Scott Hanselman on how to integrate NuGet within enterprise build environments and enable it with CI solutions. Hope this helps, Scott

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• SQL SERVER – SHRINKFILE and TRUNCATE Log File in SQL Server 2008

  - by pinaldave

  Note: Please read the complete post before taking any actions. This blog post would discuss SHRINKFILE and TRUNCATE Log File. The script mentioned in the email received from reader contains the following questionable code: “Hi Pinal, If you could remember, I and my manager met you at TechEd in Bangalore. We just upgraded to SQL Server 2008. One of our jobs failed as it was using the following code. The error was: Msg 155, Level 15, State 1, Line 1 ‘TRUNCATE_ONLY’ is not a recognized BACKUP option. The code was: DBCC SHRINKFILE(TestDBLog, 1) BACKUP LOG TestDB WITH TRUNCATE_ONLY DBCC SHRINKFILE(TestDBLog, 1) GO I have modified that code to subsequent code and it works fine. But, are there other suggestions you have at the moment? USE [master] GO ALTER DATABASE [TestDb] SET RECOVERY SIMPLE WITH NO_WAIT DBCC SHRINKFILE(TestDbLog, 1) ALTER DATABASE [TestDb] SET RECOVERY FULL WITH NO_WAIT GO Configuration of our server and system is as follows: [Removed not relevant data]“ An email like this that suddenly pops out in early morning is alarming email. Because I am a dead, busy mind, so I had only one min to reply. I wrote down quickly the following note. (As I said, it was a single-minute email so it is not completely accurate). Here is that quick email shared with all of you. “Hi Mr. DBA [removed the name] Thanks for your email. I suggest you stop this practice. There are many issues included here, but I would list two major issues: 1) From the setting database to simple recovery, shrinking the file and once again setting in full recovery, you are in fact losing your valuable log data and will be not able to restore point in time. Not only that, you will also not able to use subsequent log files. 2) Shrinking file or database adds fragmentation. There are a lot of things you can do. First, start taking proper log backup using following command instead of truncating them and losing them frequently. BACKUP LOG [TestDb] TO  DISK = N'C:\Backup\TestDb.bak' GO Remove the code of SHRINKING the file. If you are taking proper log backups, your log file usually (again usually, special cases are excluded) do not grow very big. There are so many things to add here, but you can call me on my [phone number]. Before you call me, I suggest for accuracy you read Paul Randel‘s two posts here and here and Brent Ozar‘s Post here. Kind Regards, Pinal Dave” I guess this post is very much clear to you. Please leave your comments here. As mentioned, this is a very huge subject; I have just touched a tip of the ice-berg and have tried to point to authentic knowledge. Reference: Pinal Dave (http://blog.SQLAuthority.com) Filed under: Pinal Dave, SQL, SQL Authority, SQL Backup and Restore, SQL Data Storage, SQL Query, SQL Scripts, SQL Server, SQL Tips and Tricks, T SQL, Technology

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• Control to Control Binding in WPF/Silverlight

  - by psheriff

  In the past if you had two controls that you needed to work together, you would have to write code. For example, if you want a label control to display any text a user typed into a text box you would write code to do that. If you want turn off a set of controls when a user checks a check box, you would also have to write code. However, with XAML, these operations become very easy to do. Bind Text Box to Text Block As a basic example of this functionality, let’s bind a TextBlock control to a TextBox. When the user types into a TextBox the value typed in will show up in the TextBlock control as well. To try this out, create a new Silverlight or WPF application in Visual Studio. On the main window or user control type in the following XAML. <StackPanel>  <TextBox Margin="10" x:Name="txtData" />  <TextBlock Margin="10"              Text="{Binding ElementName=txtData,                             Path=Text}" /></StackPanel> Now run the application and type into the TextBox control. As you type you will see the data you type also appear in the TextBlock control. The {Binding} markup extension is responsible for this behavior. You set the ElementName attribute of the Binding markup to the name of the control that you wish to bind to. You then set the Path attribute to the name of the property of that control you wish to bind to. That’s all there is to it! Bind the IsEnabled Property Now let’s apply this concept to something that you might use in a business application. Consider the following two screen shots. The idea is that if the Add Benefits check box is un-checked, then the IsEnabled property of the three “Benefits” check boxes will be set to false (Figure 1). If the Add Benefits check box is checked, then the IsEnabled property of the “Benefits” check boxes will be set to true (Figure 2). Figure 1: Uncheck Add Benefits and the Benefits will be disabled. Figure 2: Check Add Benefits and the Benefits will be enabled. To accomplish this, you would write XAML to bind to each of the check boxes in the “Benefits To Add” section to the check box named chkBenefits. Below is a fragment of the XAML code that would be used. <CheckBox x:Name="chkBenefits" /> <CheckBox Content="401k"           IsEnabled="{Binding ElementName=chkBenefits,                               Path=IsChecked}" /> Since the IsEnabled property is a boolean type and the IsChecked property is also a boolean type, you can bind these two together. If they were different types, or if you needed them to set the IsEnabled property to the inverse of the IsChecked property then you would need to use a ValueConverter class. SummaryOnce you understand the basics of data binding in XAML, you can eliminate a lot code. Connecting controls together is as easy as just setting the ElementName and Path properties of the Binding markup extension. NOTE: You can download the complete sample code at my website. http://www.pdsa.com/downloads. Choose Tips & Tricks, then "SL – Basic Control Binding" from the drop-down. Good Luck with your Coding,Paul Sheriff ** SPECIAL OFFER FOR MY BLOG READERS **Visit http://www.pdsa.com/Event/Blog for a free eBook on "Fundamentals of N-Tier".

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• Podcast Show Notes: Collaborate 10 Wrap-Up - Part 1

  - by Bob Rhubart

  OK, I know last week I promised you a program featuring Oracle ACE Directors Mike van Alst (IT-Eye) and Jordan Braunstein (TUSC) and The Definitive Guide to SOA: Oracle Service Bus author Jeff Davies. But things happen. In this case, what happened was Collaborate 10 in Las Vegas. Prior to the event I asked Oracle ACE Director and OAUG board member Floyd Teter to see if he could round up a couple of people at the event for an impromtu interview over Skype (I was here in Cleveland) to get their impressions of the event. Listen to Part 1 Floyd, armed with his brand new iPad, went above and beyond the call of duty. At the appointed hour, which turned out to be about hour after the close of Collaborate 10,  Floyd had gathered nine other people to join him in a meeting room somewhere in the Mandalay Bay Convention Center. Here’s the entire roster: Floyd Teter - Project Manager at Jet Propulsion Lab, OAUG Board Blog | Twitter | LinkedIn | Oracle Mix | Oracle ACE Profile Mark Rittman - EMEA Technical Director and Co-Founder, Rittman Mead,  ODTUG Board Blog | Twitter | LinkedIn | Oracle Mix | Oracle ACE Profile Chet Justice - OBI Consultant at BI Wizards Blog | Twitter | LinkedIn | Oracle Mix | Oracle ACE Profile Elke Phelps - Oracle Applications DBA at Humana, OAUG SIG Chair Blog | LinkedIn | Oracle Mix | Book | Oracle ACE Profile Paul Jackson - Oracle Applications DBA at Humana Blog | LinkedIn | Oracle Mix | Book Srini Chavali - Enterprise Database & Tools Leader at Cummins, Inc Blog | LinkedIn | Oracle Mix Dave Ferguson – President, Oracle Applications Users Group LinkedIn | OAUG Profile John King - Owner, King Training Resources Website | LinkedIn | Oracle Mix Gavyn Whyte - Project Portfolio Manager at iFactory Consulting Blog | Twitter | LinkedIn | Oracle Mix John Nicholson - Channels & Alliances at Greenlight Technologies Website | LinkedIn Big thanks to Floyd for assembling the panelists and handling the on-scene MC/hosting duties.  Listen to Part 1 On a technical note, this discussion was conducted over Skype, using Floyd’s iPad, placed in the middle of the table.  During the call the audio was fantastic – the iPad did a remarkable job. Sadly, the Technology Gods were not smiling on me that day. The audio set-up that I tested successfully before the call failed to deliver when we first connected – I could hear the folks in Vegas, but they couldn’t hear me. A frantic, last-minute adjustment appeared to have fixed that problem, and the audio in my headphones from both sides of the conversation was loud and clear.  It wasn’t until I listened to the playback that I realized that something was wrong. So the audio for Vegas side of the discussion has about the same fidelity as a cell phone. It’s listenable, but disappointing when compared to what it sounded like during the discussion. Still, this was a one shot deal, and the roster of panelists and the resulting conversation was too good and too much fun to scrap just because of an unfortunate technical glitch.   Part 2 of this Collaborate 10 Wrap-Up will run next week. After that, it’s back on track with the previously scheduled program. So stay tuned: RSS del.icio.us Tags: oracle,otn,collborate 10,c10,oracle ace program,archbeat,arch2arch,oaug,odtug,las vegas Technorati Tags: oracle,otn,collborate 10,c10,oracle ace program,archbeat,arch2arch,oaug,odtug,las vegas

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• SPARC T5-8 Servers EMEA Acceleration Promotion for Partners

  - by mseika

  Dear all We are pleased to announce the EMEA T5-8 Acceleration Promotion, a price promotion that, for a limited time, makes the T5-8 server available to our EMEA partners at a very attractive discount. Why the SPARC T5-8 server Oracle's SPARC servers running Oracle Solaris are ideal for mission-critical applications requiring high performance, best-in-class availability, and unmatched scalability on all application tiers. SPARC servers include built-in virtualization, systems management, and security at no additional cost. Designed for applications that demand the highest performance and 24x7 availability. Oracle's SPARC T5-8 server is the fastest and the most advanced, scalable midrange server in the Oracle portfolio. The Oracle SPARC T5-8 server is in the sweet spot of the UNIX midrange, and directly competing with IBM P770(+) and P780(+) systems, with a 7x price advantage (see official Oracle press release) over a similarly configured P780 system! What are we offering Effective immediately, the fully-configured T5-8 server is available to VADs with a 38% discount off price list: this is 8 additional points on top of the standard 30% contractual discount. The promo will be communicated to VADs and VARs, and VADs are expected to pass the additional discount through to the VARs. Resellers will be encouraged to use this attractive price to position T5-8 versus the competition, accelerate T5-8 sales, and use the increased margin to offer additional services to their end users - thus expanding their footprint within their customers and making the T5-8 business proposition even more compelling. This is a unique opportunity for partners to expand their base and beat the competition with a 7x price advantage over a similarly configured IBM P780. This price promotion is only available to OPN Partners, and is valid until November 30, 2013. What's in it for Partners  More competitive price More customer budget available for more projects: attach migration services, training, ... Opportunity to attach Storage, and additional Software Higher win rate Additional Details The promotion is valid for the existing configurations of T5-8 with 8 CPU and different memory configurations, including all X-options that are part of the system and ordered at the same time. 8% additional discount to the VAD on full T5-8 - Including X-Options: Cat V (30% + 8% additional): System, CPU, Memory, Disks, Ethernet Cat U (22% + 8% additional): Infiniband HCA Cat W (30% + 8% additional): FC/SAS HBA / FCoE CNA Partner eligibilty criteria Standard requirements apply. Partners must: be an OPN member in good standing, at Gold level or above meet the Resale criteria in the SPARC T-Series servers Knowledge Zone have a right to distribute hardware via the Full Use Distribution Agreement, with Hardware Addendum if applicable. Order process The promotion is available until November 30, 2013. VADs place the order via Oracle Partner Store. A request for extra-discount has to be raised in advance using the standard process for available configs: input the configuration apply the suggested discounts submit the request in the request documentation, please refer to EMEA T5-8 FY14H1 Channel Promotion as approved in GDMT GT-EB2-Q413-107C This promotion is only valid for the T5-8 configurations stated in this announcement. Any change, or additional products / items not listed explicitly, can be ordered at the same time and will follow standard approval process. Key contacts Your local A&C organization For questions on EMEA Partner Programs for Servers: Giuseppe Facchetti For questions on the T5-8 product: Martin de Jong Best regards, Olivier Tordo Senior Director, Sales & Strategy, Hardware SolutionsEMEA Alliances & Channels Paul Flannery Senior Director, EMEA Servers Product Management

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• SPARC T5-8 Servers EMEA Acceleration Promotion for Partners

  - by mseika

  Dear all We are pleased to announce the EMEA T5-8 Acceleration Promotion, a price promotion that, for a limited time, makes the T5-8 server available to our EMEA partners at a very attractive discount. Why the SPARC T5-8 server Oracle's SPARC servers running Oracle Solaris are ideal for mission-critical applications requiring high performance, best-in-class availability, and unmatched scalability on all application tiers. SPARC servers include built-in virtualization, systems management, and security at no additional cost. Designed for applications that demand the highest performance and 24x7 availability. Oracle's SPARC T5-8 server is the fastest and the most advanced, scalable midrange server in the Oracle portfolio. The Oracle SPARC T5-8 server is in the sweet spot of the UNIX midrange, and directly competing with IBM P770(+) and P780(+) systems, with a 7x price advantage (see official Oracle press release) over a similarly configured P780 system! What are we offering Effective immediately, the fully-configured T5-8 server is available to VADs with a 38% discount off price list: this is 8 additional points on top of the standard 30% contractual discount. The promo will be communicated to VADs and VARs, and VADs are expected to pass the additional discount through to the VARs. Resellers will be encouraged to use this attractive price to position T5-8 versus the competition, accelerate T5-8 sales, and use the increased margin to offer additional services to their end users - thus expanding their footprint within their customers and making the T5-8 business proposition even more compelling. This is a unique opportunity for partners to expand their base and beat the competition with a 7x price advantage over a similarly configured IBM P780. This price promotion is only available to OPN Partners, and is valid until November 30, 2013. What's in it for Partners  More competitive price More customer budget available for more projects: attach migration services, training, ... Opportunity to attach Storage, and additional Software Higher win rate Additional Details The promotion is valid for the existing configurations of T5-8 with 8 CPU and different memory configurations, including all X-options that are part of the system and ordered at the same time. 8% additional discount to the VAD on full T5-8 - Including X-Options: Cat V (30% + 8% additional): System, CPU, Memory, Disks, Ethernet Cat U (22% + 8% additional): Infiniband HCA Cat W (30% + 8% additional): FC/SAS HBA / FCoE CNA Partner eligibilty criteria Standard requirements apply. Partners must: be an OPN member in good standing, at Gold level or above meet the Resale criteria in the SPARC T-Series servers Knowledge Zone have a right to distribute hardware via the Full Use Distribution Agreement, with Hardware Addendum if applicable. Order process The promotion is available until November 30, 2013. VADs place the order via Oracle Partner Store. A request for extra-discount has to be raised in advance using the standard process for available configs: input the configuration apply the suggested discounts submit the request in the request documentation, please refer to EMEA T5-8 FY14H1 Channel Promotion as approved in GDMT GT-EB2-Q413-107C This promotion is only valid for the T5-8 configurations stated in this announcement. Any change, or additional products / items not listed explicitly, can be ordered at the same time and will follow standard approval process. Key contacts Your local A&C organization For questions on EMEA Partner Programs for Servers: Giuseppe Facchetti For questions on the T5-8 product: Martin de Jong Best regards, Olivier Tordo Senior Director, Sales & Strategy, Hardware SolutionsEMEA Alliances & Channels Paul Flannery Senior Director, EMEA Servers Product Management

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• SPARC T5-8 Servers EMEA Acceleration Promotion for Partners

  - by mseika

  Dear all We are pleased to announce the EMEA T5-8 Acceleration Promotion, a price promotion that, for a limited time, makes the T5-8 server available to our EMEA partners at a very attractive discount. Why the SPARC T5-8 server Oracle's SPARC servers running Oracle Solaris are ideal for mission-critical applications requiring high performance, best-in-class availability, and unmatched scalability on all application tiers. SPARC servers include built-in virtualization, systems management, and security at no additional cost. Designed for applications that demand the highest performance and 24x7 availability. Oracle's SPARC T5-8 server is the fastest and the most advanced, scalable midrange server in the Oracle portfolio. The Oracle SPARC T5-8 server is in the sweet spot of the UNIX midrange, and directly competing with IBM P770(+) and P780(+) systems, with a 7x price advantage (see official Oracle press release) over a similarly configured P780 system! What are we offering Effective immediately, the fully-configured T5-8 server is available to VADs with a 38% discount off price list: this is 8 additional points on top of the standard 30% contractual discount. The promo will be communicated to VADs and VARs, and VADs are expected to pass the additional discount through to the VARs. Resellers will be encouraged to use this attractive price to position T5-8 versus the competition, accelerate T5-8 sales, and use the increased margin to offer additional services to their end users - thus expanding their footprint within their customers and making the T5-8 business proposition even more compelling. This is a unique opportunity for partners to expand their base and beat the competition with a 7x price advantage over a similarly configured IBM P780. This price promotion is only available to OPN Partners, and is valid until November 30, 2013. What's in it for Partners  More competitive price More customer budget available for more projects: attach migration services, training, ... Opportunity to attach Storage, and additional Software Higher win rate Additional Details The promotion is valid for the existing configurations of T5-8 with 8 CPU and different memory configurations, including all X-options that are part of the system and ordered at the same time. 8% additional discount to the VAD on full T5-8 - Including X-Options: Cat V (30% + 8% additional): System, CPU, Memory, Disks, Ethernet Cat U (22% + 8% additional): Infiniband HCA Cat W (30% + 8% additional): FC/SAS HBA / FCoE CNA Partner eligibilty criteria Standard requirements apply. Partners must: be an OPN member in good standing, at Gold level or above meet the Resale criteria in the SPARC T-Series servers Knowledge Zone have a right to distribute hardware via the Full Use Distribution Agreement, with Hardware Addendum if applicable. Order process The promotion is available until November 30, 2013. VADs place the order via Oracle Partner Store. A request for extra-discount has to be raised in advance using the standard process for available configs: input the configuration apply the suggested discounts submit the request in the request documentation, please refer to EMEA T5-8 FY14H1 Channel Promotion as approved in GDMT GT-EB2-Q413-107C This promotion is only valid for the T5-8 configurations stated in this announcement. Any change, or additional products / items not listed explicitly, can be ordered at the same time and will follow standard approval process. Key contacts Your local A&C organization For questions on EMEA Partner Programs for Servers: Giuseppe Facchetti For questions on the T5-8 product: Martin de Jong Best regards, Olivier Tordo Senior Director, Sales & Strategy, Hardware SolutionsEMEA Alliances & Channels Paul Flannery Senior Director, EMEA Servers Product Management

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