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How common are "bandage" fixes?

- by gablin

Imagine the following scenario: You've detected that your (or someone else's) program has a bug - a function produces the wrong result when given a particular input. You examine the code and can't find anything wrong: it just seem to bog out when given this input. You can now do one of two things: you either examine the code further until you've found the actual cause; or you slap on a bandage by adding an if statement checking if the input is this particular input - if it is, return the expected value. To me, applying the bandage would be completely unacceptable. If the code is behaving unexpectingly on this input, what other input that you've missed will it react strangely to? It just doesn't seem like a fix at all - you're just shoveling the problem under the rug. As I wouldn't even consider doing this, I'm surprised at how often the professors and books keep reminding us about how applying "bandage" fixes is not a good idea. So this makes me wonder: just how common are these kinds of "fixes"?

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Posting from ASP.NET WebForms page to another URL

- by hajan

Few days ago I had a case when I needed to make FORM POST from my ASP.NET WebForms page to an external site URL. More specifically, I was working on implementing Simple Payment System (like Amazon, PayPal, MoneyBookers). The operator asks to make FORM POST request to a given URL in their website, sending parameters together with the post which are computed on my application level (access keys, secret keys, signature, return-URL… etc). So, since we are not allowed nesting another form inside the <form runat=”server”> … </form>, which is required because other controls in my ASPX code work on server-side, I thought to inject the HTML and create FORM with method=”POST”. After making some proof of concept and testing some scenarios, I’ve concluded that I can do this very fast in two ways: Using jQuery to create form on fly with the needed parameters and make submit() Using HttpContext.Current.Response.Write to write the form on server-side (code-behind) and embed JavaScript code that will do the post Both ways seemed fine. 1. Using jQuery to create FORM html code and Submit it. Let’s say we have ‘PAY NOW’ button in our ASPX code: <asp:Button ID="btnPayNow" runat="server" Text="Pay Now" /> Now, if we want to make this button submit a FORM using POST method to another website, the jQuery way should be as follows: <script src="http://ajax.aspnetcdn.com/ajax/jquery/jquery-1.5.1.js" type="text/javascript"></script> <script type="text/javascript"> $(function () { $("#btnPayNow").click(function (event) { event.preventDefault(); //construct htmlForm string var htmlForm = "<form id='myform' method='POST' action='http://www.microsoft.com'>" + "<input type='hidden' id='name' value='hajan' />" + "</form>"; //Submit the form $(htmlForm).appendTo("body").submit(); }); }); </script> Yes, as you see, the code fires on btnPayNow click. It removes the default button behavior, then creates htmlForm string. After that using jQuery we append the form to the body and submit it. Inside the form, you can see I have set the htttp://www.microsoft.com URL, so after clicking the button you should be automatically redirected to the Microsoft website (just for test, of course for Payment I’m using Operator's URL). 2. Using HttpContext.Current.Response.Write to write the form on server-side (code-behind) and embed JavaScript code that will do the post The C# code behind should be something like this: public void btnPayNow_Click(object sender, EventArgs e) { string Url = "http://www.microsoft.com"; string formId = "myForm1"; StringBuilder htmlForm = new StringBuilder(); htmlForm.AppendLine("<html>"); htmlForm.AppendLine(String.Format("<body onload='document.forms[\"{0}\"].submit()'>",formId)); htmlForm.AppendLine(String.Format("<form id='{0}' method='POST' action='{1}'>", formId, Url)); htmlForm.AppendLine("<input type='hidden' id='name' value='hajan' />"); htmlForm.AppendLine("</form>"); htmlForm.AppendLine("</body>"); htmlForm.AppendLine("</html>"); HttpContext.Current.Response.Clear(); HttpContext.Current.Response.Write(htmlForm.ToString()); HttpContext.Current.Response.End(); } So, with this code we create htmlForm string using StringBuilder class and then just write the html to the page using HttpContext.Current.Response.Write. The interesting part here is that we submit the form using JavaScript code: document.forms["myForm1"].submit() This code runs on body load event, which means once the body is loaded the form is automatically submitted. Note: In order to test both solutions, create two applications on your web server and post the form from first to the second website, then get the values in the second website using Request.Form[“input-field-id”] I hope this was useful post for you. Regards, Hajan

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JavaScript Intellisense with Telerik in ASP.NET Master Page Project with VS 2010

- by Otto Neff

Today I was looking for a solution to get finally the JScript/Javascript/jQuery Intellisense Featureworking with my ASP.Net Webform Project to work. I found some good articles: - JScript IntelliSense Overview- JScript IntelliSense: A Reference for the “Reference” Tag- Enabling JavaScript intellisense in VS.NET 2010 to work with SharePoint 2010- Rich IntelliSense for jQueryBUT, all of suggested solutions did not work right with my Master Page based Visual Studio 2010 Solution.Only with physical Javascript Files (Telerik includes certain Javascript Files like jQuery as Ressource) or/andconfigure always a new ASP.NET Scriptmanager / RadScriptManager on every page derived from the Master Page, wasn't exactly what I was looking for. So I came up with the following simple Solution, to Trick VS2010and still have the Project running with multiple runat="server" Scriptmanagers. In short:- New ASP.NET control derived from ScriptManager with emtpy overwritten OnInit() to use it as emtpy wrapper for VS2010. In detail:New RadScriptManager Classusing System; using System.Collections.Generic; using System.Linq; using System.Web; using Telerik.Web.UI; namespace IntellisenseJavascript.Controls { public class IntelliJS : RadScriptManager { protected override void OnInit(EventArgs e) { } protected override void OnPreRender(EventArgs e) { } protected override void OnLoad(EventArgs e) { } protected override void Render(System.Web.UI.HtmlTextWriter writer) { } public override void RenderControl(System.Web.UI.HtmlTextWriter writer) { } } } web.config<configuration> ... <system.web> ... <pages> <controls> <add tagPrefix="telerik" namespace="Telerik.Web.UI" assembly="Telerik.Web.UI, Version=2011.3.1115.40, Culture=neutral, PublicKeyToken=121fae78165ba3d4"/> <add tagPrefix="VSFix" namespace="IntellisenseJavascript.Controls" assembly="IntellisenseJavascript"/> </controls> </pages> ... Master Page<%@ Master Language="C#" AutoEventWireup="true" CodeBehind="Site.master.cs" Inherits="IntellisenseJavascript.Site" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html > <head id="head" runat="server"> <title></title> <telerik:RadStyleSheetManager ID="radStyleSheetManager" runat="server" /> </head> <body> <form id="form" runat="server"> <telerik:RadScriptManager ID="radScriptManager" runat="server"> <Scripts> <asp:ScriptReference Assembly="Telerik.Web.UI, Version=2011.3.1115.40, Culture=neutral, PublicKeyToken=121fae78165ba3d4" Name="Telerik.Web.UI.Common.Core.js" /> <asp:ScriptReference Assembly="Telerik.Web.UI, Version=2011.3.1115.40, Culture=neutral, PublicKeyToken=121fae78165ba3d4" Name="Telerik.Web.UI.Common.jQuery.js" /> <asp:ScriptReference Assembly="Telerik.Web.UI, Version=2011.3.1115.40, Culture=neutral, PublicKeyToken=121fae78165ba3d4" Name="Telerik.Web.UI.Common.jQueryInclude.js" /> </Scripts> </telerik:RadScriptManager> <telerik:RadAjaxManager ID="radAjaxManager" runat="server"> </telerik:RadAjaxManager> <div> #MASTER CONTENT# <asp:ContentPlaceHolder ID="contentPlaceHolder" runat="server"> </asp:ContentPlaceHolder> </div> </form> <script type="text/javascript"> $(function () { // Masterpage ready $('body').css('margin', '50px'); }); </script> </body> </html> ASPX Page<%@ Page Title="" Language="C#" MasterPageFile="~/Site.Master" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="IntellisenseJavascript.Default" %> <asp:Content ID="Content1" ContentPlaceHolderID="contentPlaceHolder" runat="server"> <VSFix:IntelliJS runat="server" ID="intelliJS"> <Scripts> <asp:ScriptReference Assembly="Telerik.Web.UI, Version=2011.3.1115.40, Culture=neutral, PublicKeyToken=121fae78165ba3d4" Name="Telerik.Web.UI.Common.Core.js" /> <asp:ScriptReference Assembly="Telerik.Web.UI, Version=2011.3.1115.40, Culture=neutral, PublicKeyToken=121fae78165ba3d4" Name="Telerik.Web.UI.Common.jQuery.js" /> <asp:ScriptReference Assembly="Telerik.Web.UI, Version=2011.3.1115.40, Culture=neutral, PublicKeyToken=121fae78165ba3d4" Name="Telerik.Web.UI.Common.jQueryInclude.js" /> </Scripts> </VSFix:IntelliJS> <div style="border: 5px solid #FF9900;"> #PAGE CONTENT# </div> <script type="text/javascript"> $(function () { // Page ready $('body').css('border', '5px solid #888'); }); </script> </asp:Content> The Result I know, this is not the way it meant to be... but now at least you can have a Main ScriptManager for all Common Scripts and Settings, inject page specific Javascripts in PageLoad Event in normal ASPX Files and have JavaScript Intellisense for defined Scripts from JS Files or Assembly Ressouce in your Content Maybe, vNext will fix this.

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How can I get a Belkin N600 DB (F9L1101v1) to work on Ubuntu 12,04 64-Bit

- by rheide

I could use some assistance to trying to get a Belkin N600 DB Wireless Dual-Band USB Adapter to work on a Dell Inspiron 1525 with 64-Bit Ubuntu 12.04. The device won't work out of the box. Tried to go the NDISWrapper route, but using the GUI, received the following message: Module could not be loaded. Error was: FATAL: Module ndiswrapper not found. Is the ndiswrapper module installed? Despite the fact that it showed up listed in the GUI, the device still did not function properly. How should I proceed from here?

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Are there real world applications where the use of prefix versus postfix operators matters?

- by Kenneth

In college it is taught how you can do math problems which use the ++ or -- operators on some variable referenced in the equation such that the result of the equation would yield different results if you switched the operator from postfix to prefix or vice versa. Are there any real world applications of using postfix or prefix operator where it makes a difference as to which you use? It doesn't seem to me (maybe I just don't have enough experience yet in programming) that there really is much use to having the different operators if it only applies in math equations. EDIT: Suggestions so far include: function calls //f(++x) != f(x++) loop comparison //while (++i < MAX) != while (i++ < MAX)

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Using Rich Text Editor (WYSIWYG) in ASP.NET MVC

- by imran_ku07

Introduction: In ASP.NET MVC forum I found some question regarding a sample HTML Rich Text Box Editor(also known as wysiwyg).So i decided to create a sample ASP.NET MVC web application which will use a Rich Text Box Editor. There are are lot of Html Editors are available, but for creating a sample application, i decided to use cross-browser WYSIWYG editor from openwebware. In this article I will discuss what changes needed to work this editor with ASP.NET MVC. Also I had attached the sample application for download at http://www.speedfile.org/155076. Also note that I will only show the important features, not discuss every feature in detail. Description: So Let's start create a sample ASP.NET MVC application. You need to add the following script files, jquery-1.3.2.min.js jquery_form.js wysiwyg.js wysiwyg-settings.js wysiwyg-popup.js Just put these files inside Scripts folder. Also put wysiwyg.css in your Content Folder and add the following folders in your project addons popups Also create a empty folder Uploads to store the uploaded images. Next open wysiwyg.js and set your configuration // Images Directory this.ImagesDir = "/addons/imagelibrary/images/"; // Popups Directory this.PopupsDir = "/popups/"; // CSS Directory File this.CSSFile = "/Content/wysiwyg.css"; Next create a simple View TextEditor.aspx inside View / Home Folder and add the folllowing HTML. <%@ Page Language="C#" Inherits="System.Web.Mvc.ViewPage" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html > <head runat="server"> <title>TextEditor</title> <script src="../../Scripts/wysiwyg.js" type="text/javascript"></script> <script src="../../Scripts/wysiwyg-settings.js" type="text/javascript"></script> <script type="text/javascript"> WYSIWYG.attach('text', full); </script> </head> <body> <% using (Html.BeginForm()){ %> <textarea id="text" name="test2" style="width:850px;height:200px;"> </textarea> <input type="submit" value="submit" /> <%} %> </body> </html> Here i have just added a text area control and a submit button inside a form. Note the id of text area and WYSIWYG.attach function's first parameter is same and next to watch is the HomeController.cs using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.Mvc; using System.IO; namespace HtmlTextEditor.Controllers { [HandleError] public class HomeController : Controller { public ActionResult Index() { ViewData["Message"] = "Welcome to ASP.NET MVC!"; return View(); } public ActionResult About() { return View(); } public ActionResult TextEditor() { return View(); } [AcceptVerbs(HttpVerbs.Post)] [ValidateInput(false)] public ActionResult TextEditor(string test2) { Session["html"] = test2; return RedirectToAction("Index"); } public ActionResult UploadImage() { if (Request.Files[0].FileName != "") { Request.Files[0].SaveAs(Server.MapPath("~/Uploads/" + Path.GetFileName(Request.Files[0].FileName))); return Content(Url.Content("~/Uploads/" + Path.GetFileName(Request.Files[0].FileName))); } return Content("a"); } } } So simple code, just save the posted Html into Session. Here the parameter of TextArea action is test2 which is same as textarea control name of TextArea.aspx View. Also note ValidateInputAttribute is false, so it's up to you to defends against XSS. Also there is an Action method which simply saves the file inside Upload Folder. I am uploading the file using Jquery Form Plugin. Here is the code which is found in insert_image.html inside addons folder, function ChangeImage() { var myform=document.getElementById("formUpload"); $(myform).ajaxSubmit({success: function(responseText){ insertImage(responseText); window.close(); } }); } and here is the Index View which simply renders the html of Editor which was saved in Session <%@ Page Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage" %> <asp:Content ID="indexTitle" ContentPlaceHolderID="TitleContent" runat="server"> Home Page </asp:Content> <asp:Content ID="indexContent" ContentPlaceHolderID="MainContent" runat="server"> <h2><%= Html.Encode(ViewData["Message"]) %></h2> <p> To learn more about ASP.NET MVC visit <a href="http://asp.net/mvc" title="ASP.NET MVC Website">http://asp.net/mvc</a>. </p> <%if (Session["html"] != null){ Response.Write(Session["html"].ToString()); } %> </asp:Content> Summary: Hopefully you will enjoy this article. Just download the code and see the effect. From security point, you must handle the XSS attack your self. I had uploaded the sample application in http://www.speedfile.org/155076

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How to fix “Unable to cast COM object of type ‘Microsoft.SharePoint.Library.SPRequestInternalClass’ to interface type ‘Microsoft.SharePoint.Library.ISPRequest” using PowerGUI

- by ybbest

I got the error today when debugging some of my PowerShell Script in PowerGUI. The script works perfectly fine in PowerShell console. Then I had spent a couple of hours scratching my head, trying to figure out why. It turns out that the PowerShell Variables Panel causes the problem. Not quite sure why, but collapse the panel fix the problem. Problem: It throws the following exception when debugging my PowerShell Script. Analysis: It turns out that the PowerShell Variables Panel causes the problem. I assume it calls some function to grab value of some of variables which cause the problems. Solution: Collapse or Close the variables panel fix the problem

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CRM@Oracle Series: Forecasting

- by tony.berk

What do you trust more: the weather forecast or your sales forecast? I hope the answer is your sales forecast! Either way, would your sales forecast be more accurate if sales management had visibility into what the sales reps are forecasting and what has changed since the last forecast? What if management could adjust forecasts for accuracy based on analytic tools? Today's slidecast discusses sales forecasting and how Oracle implemented forecasting in our global implementation of Siebel CRM, including the steps involved to roll up the forecast. CRM@Oracle - Forecasting Click here to learn more about Oracle CRM products and here to learn about other customers using Oracle CRM. Are you enjoying the CRM@Oracle Series? If you have a particular CRM area or function which you'd like to hear how Oracle implemented it internally, let us know and we'll get it on our list.

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php fopen => 500 Internal Server Error

- by Ahmed B

I have a website hosted on a dedicated server, I noticed that Google and other search engines can't access to the most URLs on my website!! On my localhost I have made a small test : var_dump(fopen('http://www.aswat.ma', 'r')); And I got this error : Warning: fopen(http://www.aswat.ma) [function.fopen]: failed to open stream: HTTP request failed! HTTP/1.1 500 Internal Server Error in C:\xampp\htdocs\pnowate\public\index.php on line 4 bool(false) If I change the URL "http://www.aswat.ma" by "www.google.co.ma" I got this : resource(3) of type (stream) Any one have any idea about this issue ??

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Oracle Announces the new Environmental Accounting and Reporting Solution for Oracle ERP

- by Oracle Accelerate for Midsize Companies

Oracle now offers Environmental Accounting & Reporting extends the capabilities of both Oracle's E-Business Suite Financials and JD Edwards Enterprise One family of applications. Oracle Environmental Accounting and Reporting enables organizations to track their greenhouse gas (GHG) emissions and other environmental data against reduction targets, and facilitates environmental reporting for both voluntary and legislated emissions reporting schemes. The solution manages this function from within the existing ERP system and utilizes Oracle Business Intelligence to provide immediate insight into an organization's environmental data to identify and manage CO2 and cost reduction opportunities-providing rapid ROI. Click here to learn more: http://www.oracle.com/us/products/applications/green/accounting-reporting-410442.html

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Package operation failed when updating 12.04

- by Gausstein

Whenever I try to update 12.04, I get the "Package Operation Failed" message. I haven't been able to update my system. In the "Details" section it says: installArchives() failed: Extracting templates from packages: 30%% Extracting templates from packages: 61%% Extracting templates from packages: 91%% Extracting templates from packages: 100%% Preconfiguring packages ... Extracting templates from packages: 30%% Extracting templates from packages: 61%% Extracting templates from packages: 91%% Extracting templates from packages: 100%% Preconfiguring packages ... Extracting templates from packages: 30%% Extracting templates from packages: 61%% Extracting templates from packages: 91%% Extracting templates from packages: 100%% Preconfiguring packages ... Extracting templates from packages: 30%% Extracting templates from packages: 61%% Extracting templates from packages: 91%% Extracting templates from packages: 100%% Preconfiguring packages ... dpkg: error: parsing file '/var/lib/dpkg/available' near line 42150 package 'x11-apps': blank line in value of field 'Description' Error in function:

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Rotate to a set degree then reverse and repeat in Unity

- by Ryan

and thank you for your time. I'm making my first project in Unity, a simple game where touching objects adds points to the players score. I'd like the objects to have a pleasant back and forth swaying animation on the Z axis. Nodding to the right 30 degrees, then to the left 30 degrees, on and on. Here's what I've got... public class Rotator : MonoBehaviour { void Update () { transform.Rotate(new Vector3(0,0,12)*Time.deltaTime); } } This gives me a nice slow rotation. But I am clueless how to tell Unity to stop at +30 degrees, reverse to -30 degrees, rotate again to +30, stop and repeat, etc, etc. I'd really appreciate any help. Maybe there is a thread like this that I was not able to find? I assume it will involve some kind of 'if than' function? Thank you, Ryan

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NET Math Libraries

- by JoshReuben

NET Mathematical Libraries .NET Builder for Matlab The MathWorks Inc. - http://www.mathworks.com/products/netbuilder/ MATLAB Builder NE generates MATLAB based .NET and COM components royalty-free deployment creates the components by encrypting MATLAB functions and generating either a .NET or COM wrapper around them. .NET/Link for Mathematica www.wolfram.com a product that 2-way integrates Mathematica and Microsoft's .NET platform call .NET from Mathematica - use arbitrary .NET types directly from the Mathematica language. use and control the Mathematica kernel from a .NET program. turns Mathematica into a scripting shell to leverage the computational services of Mathematica. write custom front ends for Mathematica or use Mathematica as a computational engine for another program comes with full source code. Leverages MathLink - a Wolfram Research's protocol for sending data and commands back and forth between Mathematica and other programs. .NET/Link abstracts the low-level details of the MathLink C API. Extreme Optimization http://www.extremeoptimization.com/ a collection of general-purpose mathematical and statistical classes built for the.NET framework. It combines a math library, a vector and matrix library, and a statistics library in one package. download the trial of version 4.0 to try it out. Multi-core ready - Full support for Task Parallel Library features including cancellation. Broad base of algorithms covering a wide range of numerical techniques, including: linear algebra (BLAS and LAPACK routines), numerical analysis (integration and differentiation), equation solvers. Mathematics leverages parallelism using .NET 4.0's Task Parallel Library. Basic math: Complex numbers, 'special functions' like Gamma and Bessel functions, numerical differentiation. Solving equations: Solve equations in one variable, or solve systems of linear or nonlinear equations. Curve fitting: Linear and nonlinear curve fitting, cubic splines, polynomials, orthogonal polynomials. Optimization: find the minimum or maximum of a function in one or more variables, linear programming and mixed integer programming. Numerical integration: Compute integrals over finite or infinite intervals, over 2D and higher dimensional regions. Integrate systems of ordinary differential equations (ODE's). Fast Fourier Transforms: 1D and 2D FFT's using managed or fast native code (32 and 64 bit) BigInteger, BigRational, and BigFloat: Perform operations with arbitrary precision. Vector and Matrix Library Real and complex vectors and matrices. Single and double precision for elements. Structured matrix types: including triangular, symmetrical and band matrices. Sparse matrices. Matrix factorizations: LU decomposition, QR decomposition, singular value decomposition, Cholesky decomposition, eigenvalue decomposition. Portability and performance: Calculations can be done in 100% managed code, or in hand-optimized processor-specific native code (32 and 64 bit). Statistics Data manipulation: Sort and filter data, process missing values, remove outliers, etc. Supports .NET data binding. Statistical Models: Simple, multiple, nonlinear, logistic, Poisson regression. Generalized Linear Models. One and two-way ANOVA. Hypothesis Tests: 12 14 hypothesis tests, including the z-test, t-test, F-test, runs test, and more advanced tests, such as the Anderson-Darling test for normality, one and two-sample Kolmogorov-Smirnov test, and Levene's test for homogeneity of variances. Multivariate Statistics: K-means cluster analysis, hierarchical cluster analysis, principal component analysis (PCA), multivariate probability distributions. Statistical Distributions: 25 29 continuous and discrete statistical distributions, including uniform, Poisson, normal, lognormal, Weibull and Gumbel (extreme value) distributions. Random numbers: Random variates from any distribution, 4 high-quality random number generators, low discrepancy sequences, shufflers. New in version 4.0 (November, 2010) Support for .NET Framework Version 4.0 and Visual Studio 2010 TPL Parallellized – multicore ready sparse linear program solver - can solve problems with more than 1 million variables. Mixed integer linear programming using a branch and bound algorithm. special functions: hypergeometric, Riemann zeta, elliptic integrals, Frensel functions, Dawson's integral. Full set of window functions for FFT's. Product Price Update subscription Single Developer License $999 $399 Team License (3 developers) $1999 $799 Department License (8 developers) $3999 $1599 Site License (Unlimited developers in one physical location) $7999 $3199 NMath http://www.centerspace.net .NET math and statistics libraries matrix and vector classes random number generators Fast Fourier Transforms (FFTs) numerical integration linear programming linear regression curve and surface fitting optimization hypothesis tests analysis of variance (ANOVA) probability distributions principal component analysis cluster analysis built on the Intel Math Kernel Library (MKL), which contains highly-optimized, extensively-threaded versions of BLAS (Basic Linear Algebra Subroutines) and LAPACK (Linear Algebra PACKage). Product Price Update subscription Single Developer License $1295 $388 Team License (5 developers) $5180 $1554 DotNumerics http://www.dotnumerics.com/NumericalLibraries/Default.aspx free DotNumerics is a website dedicated to numerical computing for .NET that includes a C# Numerical Library for .NET containing algorithms for Linear Algebra, Differential Equations and Optimization problems. The Linear Algebra library includes CSLapack, CSBlas and CSEispack, ports from Fortran to C# of LAPACK, BLAS and EISPACK, respectively. Linear Algebra (CSLapack, CSBlas and CSEispack). Systems of linear equations, eigenvalue problems, least-squares solutions of linear systems and singular value problems. Differential Equations. Initial-value problem for nonstiff and stiff ordinary differential equations ODEs (explicit Runge-Kutta, implicit Runge-Kutta, Gear's BDF and Adams-Moulton). Optimization. Unconstrained and bounded constrained optimization of multivariate functions (L-BFGS-B, Truncated Newton and Simplex methods). Math.NET Numerics http://numerics.mathdotnet.com/ free an open source numerical library - includes special functions, linear algebra, probability models, random numbers, interpolation, integral transforms. A merger of dnAnalytics with Math.NET Iridium in addition to a purely managed implementation will also support native hardware optimization. constants & special functions complex type support real and complex, dense and sparse linear algebra (with LU, QR, eigenvalues, ... decompositions) non-uniform probability distributions, multivariate distributions, sample generation alternative uniform random number generators descriptive statistics, including order statistics various interpolation methods, including barycentric approaches and splines numerical function integration (quadrature) routines integral transforms, like fourier transform (FFT) with arbitrary lengths support, and hartley spectral-space aware sequence manipulation (signal processing) combinatorics, polynomials, quaternions, basic number theory. parallelized where appropriate, to leverage multi-core and multi-processor systems fully managed or (if available) using native libraries (Intel MKL, ACMS, CUDA, FFTW) provides a native facade for F# developers

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Delegates and Events in C#

- by hakanbilge

Events and their underlying mechanism "Delegates" are very powerful tools of a developer and Event Driven Programming is one of the main Programming Paradigms. Its wiki definition is "event-driven programming or event-based programming is a programming paradigm in which the flow of the program is determined by events?i.e., sensor outputs or user actions (mouse clicks, key presses) or messages from other programs or threads." That means, your program can go its own way sequentially and in the case of anything that requires attention is done (when an event fires) by somebody or something, you can response it by using that event's controller method (this mechanism is like interrupt driven programming in embedded systems). There are many real world scenarios for events, for example, ASP.NET uses events to catch a click on a button or in your app, controller has notice of a change in UI by handling events exposed by view (in MVC pattern). Delegates in C# C# delegates correspond to function pointers in [read more....]

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HTML5 and CSS3 Editing in Windows Live Writer

- by Rick Strahl

Windows Live Writer is a wonderful tool for editing blog posts and getting them posted to your blog. What makes it nice is that it has a small set of useful features, plus a simple plug-in model that has spawned many useful add-ins. Small tool with a reasonably decent plug-in model to extend equals a great solution to a simple problem. If you're running Windows, have a blog and aren’t using Live Writer you’re probably doing it wrong…One of Live Writer’s nice features is that it can download your blog’s CSS for preview and edit displays. It lets you edit your content inside of the context of that CSS using the WYSIWYG editor, so your content actually looks very close to what you’ll see on your blog while you’re editing your post. Unfortunately Live Writer renders the HTML content in the Web Browser Control’s default IE 7 rendering mode. Yeah you read that right: IE 7 is the default for the Web Browser control and most applications that use it, are stuck in this modus unless the application explicitly overrides this default. The Web Browser control does not use the version of Internet Explorer installed on the system (IE 10 on my Win8 machine) but uses IE 7 mode for ‘compatibility’ for old applications.If you are importing your blog’s CSS that may suck if you’re using rich HTML 5 and CSS 3 formatting. Hack the Registry to get Live Writer to render using IE 9 or 10In order to get Live Writer (or any other application that uses the Web Browser Control for that matter) to render you can apply a registry hack that overrides the Web Browser Control engine usage for a specific application. I wrote about this in detail in a previous blog post a couple of years back.Here’s how you can set up Windows Live Writer to render your CSS 3 by making a change in your registry:The above is for setup on a 64 bit machine, where I configure Live Writer which is a 32 bit application for using IE 10 rendering. The keys set are as follows:32bit Configuration on 64 bit machine:HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATIONKey: WindowsLiveWriter.exeValue: 9000 or 10000 (IE 9 or 10 respectively) (DWORD value)On a 32 bit only machine: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATIONKey: WindowsLiveWriter.exeValue: 9000 or 10000 (IE 9 or 10 respectively) (DWORD value)Use decimal values of 9000, 10000 or 11000 to specify specific versions of Internet Explorer. This is a minor tweak, but it’s nice to actually see my blog posts now with the proper CSS formatting intact. Notice the rounded borders and shadow on the code blocks as well as the overflow-x and scrollbars that show up. In this particular case I can see what the code blocks actually look like in a specific resolution – much better than in the old plain view which just chopped things off at the end of the window frame. There are a few other elements that now show properly in the editor as well including block quotes and note boxes that I occasionally use. It’s minor stuff, but it makes the editing experience better yet and closer to the final things so there are less republish operations than I previously had. Sweet!Note that this approach of putting an IE version override into the registry works with most applications that use the Web Browser control. If you are using the Web Browser control in your own applications, it’s a good idea to switch the browser to a more recent version so you can take advantage of HTML 5 and CSS 3 in your browser displayed content by automatically setting this flag in the registry or as part of the application’s startup routine if not dedicated setup tool is used. At the very least you might set it to 9000 (IE 9) which supports most of the basic CSS3 features and is a decent baseline that works for most Windows 7 and 8 machines. If running pre-IE9, the browser will fall back to IE7 rendering and look bad but at least more recent browsers will see an improved experience.I’m surprised that there aren’t more vendors and third party apps using this feature. You can see in my first screen shot that there are only very few entries in the registry key group on my machine – any other apps use the Web Browser control are using IE7. Go figure. Certainly Windows Live Writer should be writing this key into the registry automatically as part of installation to support this functionality out of the box, but alas since it does not, this registry hack lets you get your way anyway…Resources.reg Files to register Live Write Browser Emulation (set for IE9)Specifying Internet Explorer Version for ApplicationsSnagIt LiveWriter Plug-inDownload Windows Live WriterDownload Windows Live Writer with Chocolatey© Rick Strahl, West Wind Technologies, 2005-2013Posted in Live Writer Windows Tweet !function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0];if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src="//platform.twitter.com/widgets.js";fjs.parentNode.insertBefore(js,fjs);}}(document,"script","twitter-wjs"); (function() { var po = document.createElement('script'); po.type = 'text/javascript'; po.async = true; po.src = 'https://apis.google.com/js/plusone.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(po, s); })();

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How do I disable the touchpad using the upper left corner on an HP Pavilion dv6?

- by William

To disable the touchpad on an HP Pavilion dv6, you double tap on an area in the upper left hand corner of the touchpad. Then the blue indicator light around the border of the touchpad turns red, and the touchpad is disabled. Double tapping on this area again turns the touchpad turns back on. I do a lot of typing, and frequently bump the touchpad, messing up my work and annoying me. So, I would like to enable the ability to disable the touchpad by double-tapping on the area in the upper left hand corner. Unfortunately, there is no function key backup to disable the touchpad. This does not work in Ubuntu. I can turn it off using touchpad-indicator, but the program must be manually started and you have to disable using the key combination. Double-tapping the area is much easier. My computer is the HP Pavilion dv6-6135dx. Any help would be greatly appreciated.

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Three Ways to Access the Windows 8 Boot Options Menu

- by Lori Kaufman

The boot options have been consolidated in Windows 8 into a single menu, called the “boot options menu,” providing access to repair tools and options for changing Windows startup behavior, such as enabling debugging, booting into safe mode, and launching into a recovery environment. The days of pressing a function key or Esc to interrupt the boot process and get into the BIOS configuration (in UEFI enabled systems) are gone. There are three ways of accessing the new boot options menu in Windows 8 and we’ll show you how. 7 Ways To Free Up Hard Disk Space On Windows HTG Explains: How System Restore Works in Windows HTG Explains: How Antivirus Software Works

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$.fadeTo/fadeOut() operations on Table Rows in IE fail

- by Rick Strahl

Here’s a a small problem that one of customers ran into a few days ago: He was playing around with some of the sample code I’ve put out for one of my simple jQuery demos which deals with providing a simple pulse behavior plug-in: $.fn.pulse = function(time) { if (!time) time = 2000; // *** this == jQuery object that contains selections $(this).fadeTo(time, 0.20, function() { $(this).fadeTo(time, 1); }); return this; } it’s a very simplistic plug-in and it works fine for simple pulse animations. However he ran into a problem where it didn’t work when working with tables – specifically pulsing a table row in Internet Explorer. Works fine in FireFox and Chrome, but IE not so much. It also works just fine in IE as long as you don’t try it on tables or table rows specifically. Applying against something like this (an ASP.NET GridView): var sel = $("#gdEntries>tbody>tr") .not(":first-child") // no header .not(":last-child") // no footer .filter(":even") .addClass("gridalternate"); // *** Demonstrate simple plugin sel.pulse(2000); fails in IE. No pulsing happens in any version of IE. After some additional experimentation with single rows and various ways of selecting each and still failing, I’ve come to the conclusion that the various fade operations in jQuery simply won’t work correctly in IE (any version). So even something as ‘elemental’ as this: var el = $("#gdEntries>tbody>tr").get(0);$(el).fadeOut(2000); is not working correctly. The item will stick around for 2 seconds and then magically disappear. Likewise: sel.hide().fadeIn(5000); also doesn’t fade in although the items become immediately visible in IE. Go figure that behavior out. Thanks to a tweet from red_square and a link he provided here is a grid that explains what works and doesn’t in IE (and most last gen browsers) regarding opacity: http://www.quirksmode.org/js/opacity.html It appears from this link that table and row elements can’t be made opaque, but td elements can. This means for the row selections I can force each of the td elements to be selected and then pulse all of those. Once you have the rows it’s easy to explicitly select all the columns in those rows with .find(“td”). Aha the following actually works: var sel = $("#gdEntries>tbody>tr") .not(":first-child") // no header .not(":last-child") // no footer .filter(":even") .addClass("gridalternate"); // *** Demonstrate simple plugin sel.find("td").pulse(2000); A little unintuitive that, but it works. Stay away from <table> and <tr> Fades The moral of the story is – stay away from TR, TH and TABLE fades and opacity. If you have to do it on tables use the columns instead and if necessary use .find(“td”) on your row(s) selector to grab all the columns. I’ve been surprised by this uhm relevation, since I use fadeOut in almost every one of my applications for deletion of items and row deletions from grids are not uncommon especially in older apps. But it turns out that fadeOut actually works in terms of behavior: It removes the item when the timeout’s done and because the fade is relatively short lived and I don’t extensively test IE code any more I just never noticed that the fade wasn’t happening. Note – this behavior or rather lack thereof appears to be specific to table table,tr,th elements. I see no problems with other elements like <div> and <li> items. Chalk this one up to another of IE’s shortcomings. Incidentally I’m not the only one who has failed to address this in my simplistic plug-in: The jquery-ui pulsate effect also fails on the table rows in the same way. sel.effect("pulsate", { times: 3 }, 2000); and it also works with the same workaround. If you’re already using jquery-ui definitely use this version of the plugin which provides a few more options… Bottom line: be careful with table based fade operations and remember that if you do need to fade – fade on columns.© Rick Strahl, West Wind Technologies, 2005-2010Posted in jQuery

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Scale plugin keeps forgetting hot corner settings on restart

- by Michael Butler

I'm using Ubuntu 12.04 with Unity, which I suppose uses Compiz as well. I have Compiz Settings Manager, and make the top left and bottom left corners of my screen activate the "Scale" (like Exposé) function to scale and show all windows. The problem is that when I restart the computer, the hot corners no longer do anything. I have to go back into compiz settings manager, delete the hot corner option, and then set it again. Something seems to be overriding or deleting the compiz hot corner setting on restart. Update: Sometimes, the setting loses its footing even while the computer is running. I haven't figured out yet what triggers it.

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Get the onended event for an AudioBuffer in HTML5/Chrome

- by Matthew James Davis

So I am playing audio file in Chrome and I want to detect when playing has ended so I can delete references to it. Here is my code var source = context.createBufferSource(); source.buffer = sound.buffer; source.loop = sound.loop; source.onended = function() { delete playingSounds[soundName]; } source.connect(mainNode); source.start(0, sound.start, sound.length); however, the event handler doesn't fire. Is this not yet supported as described by the W3 specification? Or am I doing something wrong?

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Useful utilities - PFE, Notepad++ and XML Notepad 2007

- by TATWORTH

All three editors are free to download and use! PFE http://www.lancs.ac.uk/staff/steveb/cpaap/pfe XML Notepad 2007 http://www.microsoft.com/downloads/details.aspx?familyid=72d6aa49-787d-4118-ba5f-4f30fe913628&displaylang=en Notepad++ http://notepad-plus.sourceforge.net/uk/download.php PFE development has stopped and I have included it mainly for reference. It does however have the facility to: Run DOS commands and capture the output Run simple macros XML Note Pad 2007 is excellent if you need to data values from attributes or elements. Notepad++ has various add-ons available for it. - When you download it, be sure to run its internal update function. Needless to say, all three are better than Notepad!

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11 Extinct Technology Sounds

- by Jason Fitzpatrick

Extinction isn’t exclusively a biological function; here’s a roundup of 11 sounds that have gone the way of the Dodo. Mental_Floss shares a roundup of 11 technological sounds lost to the ages, including rotary telephones–see above–flash cube snaps, television warmups, TV station sign offs, and more. One thing we’re shocked they didn’t include is the sound of an acoustic modem connection–but in fairness quite a few people are still using dial-up to connect to the Internet. 11 Sounds Your Kids Have Probably Never Heard [Mental_Floss via BoingBoing] Amazon’s New Kindle Fire Tablet: the How-To Geek Review HTG Explains: How Hackers Take Over Web Sites with SQL Injection / DDoS Use Your Android Phone to Comparison Shop: 4 Scanner Apps Reviewed

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Incorrect colour blending when using a pixel shader with XNA

- by MazK

I'm using XNA 4.0 to create a 2D game and while implementing a layer tinting pixel shader I noticed that when the texture's alpha value is anything between 1 or 0 the end result is different than expected. The tinting works from selecting a colour and setting the amount of tint. This is achieved via the shader which works out first the starting colour (for each r, g, b and a) : float red = texCoord.r * vertexColour.r; and then the final tinted colour : output.r = red + (tintColour.r - red) * tintAmount; The alpha value isn't tinted and is left as : output.a = texCoord.a * vertexColour.a; The picture in the link below shows different backdrops against an energy ball object where it's outer glow hasn't blended as I would like it to. The middle two are incorrect as the second non tinted one should not show a glow against a white BG and the third should be entirely invisible. The blending function is NonPremultiplied. Why the alpha value is interfering with the final colour?

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How do I install Dan's Guardian on 12.04?

- by Matt

I'm trying to install Dans Guardian on a virtual machine. The instructions ask me to run the ./configure script and then execute the command make install. The configure script runs fine but the make install throws errors. Making all in src make[2]: Entering directory `/webmin/dansguardian-2.10/src' g++ -DHAVE_CONFIG_H -I. -I.. -D__CONFFILE='"/usr/local/etc/dansguardian/dansguardian.conf"' -D__LOGLOCATION='"/usr/local/var/log/dansguardian/"' -D__PIDDIR='"/usr/local/var/run"' -D__PROXYUSER='"nobody"' -D__PROXYGROUP='"nobody"' -D__CONFDIR='"/usr/local/etc/dansguardian"' -g -O2 -MT dansguardian-fancy.o -MD -MP -MF .deps/dansguardian-fancy.Tpo -c -o dansguardian-fancy.o `test -f 'downloadmanagers/fancy.cpp' || echo './'`downloadmanagers/fancy.cpp downloadmanagers/fancy.cpp: In member function âstd::string fancydm::timestring(int)â: downloadmanagers/fancy.cpp:507:72: error: âsnprintfâ was not declared in this scope make[2]: *** [dansguardian-fancy.o] Error 1 make[2]: Leaving directory `/webmin/dansguardian-2.10/src' make[1]: *** [all-recursive] Error 1 make[1]: Leaving directory `/webmin/dansguardian-2.10' make: *** [all] Error 2 I'm running 12.04 LTS server x64

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CRM@Oracle Series: Complete Customer Intelligence

- by tony.berk

How do you to get sales folks to use a CRM system? Ah, the age-old question (well, at least the one that has been around for the past 10-15 years). Of course, some combination of "Carrot and Stick" always come up as possible answers. You hear talk about, "WIFM" or "What's in it For Me?" Oracle's internal implementation of Customer 360 consolidates all customer information in one place in Siebel CRM and enables the sales rep to present one-face to the customer. Additionally, Customer 360 provides customer intelligence and prospecting tools making it a darn nice "Carrot" for our sales teams to chew on. Check out today's slidecast for an overview. CRM@Oracle - Customer 360 Click here to learn more about Siebel CRM and other Oracle CRM products and here to learn about customers using Oracle CRM. Are you enjoying the CRM@Oracle Series? If you have a particular CRM area or function which you'd like to hear how Oracle implemented it internally, let us know and we'll get it on our list.

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