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• Silverlight Cream for January 11, 2011 -- #1024

  - by Dave Campbell

  1,000 blogposts is quite a few, but to die-hard geeks, 1000 isn't the number... 1K is the number, and today is my 1K blogpost! I've been working up to this for at least 11 months. Way back at MIX10, I approached some vendors about an idea I had. A month ago I contacted them and others, and everyone I contacted was very generous and supportive of my idea. My idea was not to run a contest, but blog as normal, and whoever ended up on my 1K post would get some swag... and I set a cut-off at 13 posts. So... blogging normally, I had some submittals, and then ran my normal process to pick up the next posts until I hit a total of 13. To provide a distribution channel for the swag, everyone on the list, please send me your snail mail (T-shirts) and email (licenses) addresses as soon as possible.   I'd like to thank the following generous sponsors for their contributions to my fun (in alphabetic order): and Rachel Hawley for contributing 4 Silverlight control sets First Floor Software and Koen Zwikstra for contributing 13 licenses for Silverlight Spy and Sara Faatz/Jason Beres for contributing 13 licenses for Silverlight Data Visualization controls and Svetla Stoycheva for contributing T-Shirts for everyone on the post and Ina Tontcheva for contributing 13 licenses for RadControls for Silverlight + RadControls for Windows Phone and Charlene Kozlan for contributing 1 combopack standard, 2 DataGrid for Silverlight, and 2 Listbox for Silverlight Standard And now finally...in this Issue: Nigel Sampson, Jeremy Likness, Dan Wahlin, Kunal Chowdhurry, Alex Knight, Wei-Meng Lee, Michael Crump, Jesse Liberty, Peter Kuhn, Michael Washington, Tau Sick, Max Paulousky, Damian Schenkelman Above the Fold: Silverlight: "Demystifying Silverlight Dependency Properties" Dan Wahlin WP7: "Using Windows Phone Gestures as Triggers" Nigel Sampson Expression Blend: "PathListBox: making data look cool" Alex Knight From SilverlightCream.com: Using Windows Phone Gestures as Triggers Nigel Sampson blogged about WP7 Gestures, the Toolkit, and using Gestures as Triggers, and actually makes it looks simple :) Jounce Part 9: Static and Dynamic Module Management Jeremy Likness has episode 9 of his explanation of his MVVM framework, Jounce, up... and a big discussion of Modules and Module Management from a Jounce perspective. Demystifying Silverlight Dependency Properties Dan Wahlin takes a page from one of his teaching opportunities, and shares his knowledge of Dependency Properties with us... beginning with what they are, defining them in code, and demonstrating their use. Customizing Silverlight ChildWindow Style using Blend Kunal Chowdhurry has a great post up about getting your Child Windows to match the look & feel of the rest of youra app... plus a bunch of Blend goodness thrown in. PathListBox: making data look cool File this post by Alex Knight in the 'holy crap' file along with the others in this series! ... just check out that cool Ticker Style Path ListBox at the top of the blog... too cool! Web Access in Windows Phone 7 Apps Wei-Meng Lee has the 3rd part of his series on WP7 development up and in this one is discussing Web Access... I mean *discussing* it... tons of detail, code, and explanation... great post. Prevent your Silverlight XAP file from caching in your browser. Michael Crump helps relieve stress on Silverlight developers everywhere by exploring how to avoid caching of your XAP in the browser... (WPFS) MVVM Light Toolkit: Soup To Nuts Part I Jesse Liberty continues his Windows Phone from Scratch series with a new segment exploring Laurent Bugnion's MVVMLight Toolkit beginning with acquiring and installing the toolkit, then proceeds to discuss linking the View and ViewModel, the ViewModel Locator, and page navigation. Silverlight: Making a DateTimePicker Peter Kuhn attacks a problem that crops up on the forums a lot -- a DateTimePicker control for Silverlight... following the "It's so simple to build one yourself" advice, he did so, and provides the code for all of us! Windows Phone 7 Animated Button Press Michael Washington took exception to button presses that gave no visual feedback and produced a behavior that does just that. Using TweetSharp in a Windows Phone 7 app Tau Sick demonstrates using TweetSharp to put a twitter feed into a WP7 app, as he did in "Hangover Helper"... all the instructions from getting Tweeetshaprt to the code necessary. Bindable Application Bar Extensions for Windows Phone 7 Max Paulousky has a post discussing some real extensions to the ApplicationBar for WP7.. he begins with a bindable application bar by Nicolas Humann that I've missed, probably because his blog is in French... and extends it to allow using DelegateCommand. How to: Load Prism modules packaged in a separate XAP file in an OOB application Damian Schenkelman posts about Prism, AppModules in separate XAPs and running OOB... if you've tried this, you know it's a hassle.. Damian has the solution. Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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• Create a new Plesk CLI user

  - by mattdwen

  I am trying to create a user which has rights to the Panels (v11) CLI tools. I've added the user to the psaadm group, as the documentation indicates, as well as the swkey-data group, as I was getting access denied for that dir. I am using sudo to run the command as that user: sudo -u mcp /usr/local/psa/bin/subscription --info test.com But I am receiving this error: Unable to connect to database: get_admin_password() failed: file_get_contents() failed: Suggestions?

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• Event Handlers Not Getting Called? - wxWidgets

  - by Alex

  Hello all, I'm working on a program for my C++ programming class, using wxWidgets. I'm having a huge problem in that my event handlers (I assume) are not getting called, because when I click on the button to trigger the event, nothing happens. My question is: Can you help me find the problem and explain why they would not be getting called? The event handlers OnAbout and OnQuit are working, just not OnCompute or OnClear. I'm really frustrated as I can't figure this out. Thanks a bunch in advance! #include "wx/wx.h" #include "time.h" #include <string> using std::string; // create object of Time class Time first; class App: public wxApp { virtual bool OnInit(); }; class MainPanel : public wxPanel { public: // Constructor for panel class // Constructs my panel class // Params - wxWindow pointer // no return type // pre-conditions: none // post-conditions: none MainPanel(wxWindow* parent); // OnCompute is the event handler for the Compute button // params - none // preconditions - none // postconditions - tasks will have been carried otu successfully // returns void void OnCompute(wxCommandEvent& WXUNUSED(event)); // OnClear is the event handler for the Clear button // params - none // preconditions - none // postconditions - all text areas will be cleared of data // returns void void OnClear(wxCommandEvent& WXUNUSED(event)); // Destructor for panel class // params none // preconditions - none // postconditions - none // no return type ~MainPanel( ); private: wxStaticText *startLabel; wxStaticText *endLabel; wxStaticText *pCLabel; wxStaticText *newEndLabel; wxTextCtrl *start; wxTextCtrl *end; wxTextCtrl *pC; wxTextCtrl *newEnd; wxButton *compute; wxButton *clear; DECLARE_EVENT_TABLE() }; class MainFrame: public wxFrame { private: wxPanel *mainPanel; public: MainFrame(const wxString& title, const wxPoint& pos, const wxSize& size); void OnQuit(wxCommandEvent& event); void OnAbout(wxCommandEvent& event); ~MainFrame(); DECLARE_EVENT_TABLE() }; enum { ID_Quit = 1, ID_About, BUTTON_COMPUTE = 100, BUTTON_CLEAR = 200 }; IMPLEMENT_APP(App) BEGIN_EVENT_TABLE(MainFrame, wxFrame) EVT_MENU(ID_Quit, MainFrame::OnQuit) EVT_MENU(ID_About, MainFrame::OnAbout) END_EVENT_TABLE() BEGIN_EVENT_TABLE(MainPanel, wxPanel) EVT_MENU(BUTTON_COMPUTE, MainPanel::OnCompute) EVT_MENU(BUTTON_CLEAR, MainPanel::OnClear) END_EVENT_TABLE() bool App::OnInit() { MainFrame *frame = new MainFrame( _("Good Guys Delivery Time Calculator"), wxPoint(50, 50), wxSize(450,340) ); frame->Show(true); SetTopWindow(frame); return true; } MainPanel::MainPanel(wxWindow* parent) : wxPanel(parent) { startLabel = new wxStaticText(this, -1, "Start Time:", wxPoint(75, 35)); start = new wxTextCtrl(this, -1, "", wxPoint(135, 35), wxSize(40, 21)); endLabel = new wxStaticText(this, -1, "End Time:", wxPoint(200, 35)); end = new wxTextCtrl(this, -1, "", wxPoint(260, 35), wxSize(40, 21)); pCLabel = new wxStaticText(this, -1, "Percent Change:", wxPoint(170, 85)); pC = new wxTextCtrl(this, -1, "", wxPoint(260, 85), wxSize(40, 21)); newEndLabel = new wxStaticText(this, -1, "New End Time:", wxPoint(180, 130)); newEnd = new wxTextCtrl(this, -1, "", wxPoint(260, 130), wxSize(40, 21)); compute = new wxButton(this, BUTTON_COMPUTE, "Compute", wxPoint(135, 185), wxSize(75, 35)); clear = new wxButton(this, BUTTON_CLEAR, "Clear", wxPoint(230, 185), wxSize(75, 35)); } MainPanel::~MainPanel() {} MainFrame::MainFrame(const wxString& title, const wxPoint& pos, const wxSize& size) : wxFrame( NULL, -1, title, pos, size ) { mainPanel = new MainPanel(this); wxMenu *menuFile = new wxMenu; menuFile->Append( ID_About, _("&About...") ); menuFile->AppendSeparator(); menuFile->Append( ID_Quit, _("E&xit") ); wxMenuBar *menuBar = new wxMenuBar; menuBar->Append( menuFile, _("&File") ); SetMenuBar( menuBar ); CreateStatusBar(); SetStatusText( _("Hi") ); } MainFrame::~MainFrame() {} void MainFrame::OnQuit(wxCommandEvent& WXUNUSED(event)) { Close(TRUE); } void MainFrame::OnAbout(wxCommandEvent& WXUNUSED(event)) { wxMessageBox( _("Alex Olson\nProject 11"), _("About"), wxOK | wxICON_INFORMATION, this); } void MainPanel::OnCompute(wxCommandEvent& WXUNUSED(event)) { int startT; int endT; int newEndT; double tD; wxString startTString = start->GetValue(); wxString endTString = end->GetValue(); startT = wxAtoi(startTString); endT = wxAtoi(endTString); pC->GetValue().ToDouble(&tD); first.SetStartTime(startT); first.SetEndTime(endT); first.SetTimeDiff(tD); try { first.ValidateData(); newEndT = first.ComputeEndTime(); *newEnd << newEndT; } catch (BaseException& e) { wxMessageBox(_(e.GetMessage()), _("Something Went Wrong!"), wxOK | wxICON_INFORMATION, this); } } void MainPanel::OnClear(wxCommandEvent& WXUNUSED(event)) { start->Clear(); end->Clear(); pC->Clear(); newEnd->Clear(); }

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• Event Handlers Not Getting Called? - wxWidgets & C++

  - by Alex

  Hello all, I'm working on a program for my C++ programming class, using wxWidgets. I'm having a huge problem in that my event handlers (I assume) are not getting called, because when I click on the button to trigger the event, nothing happens. My question is: Can you help me find the problem and explain why they would not be getting called? The event handlers OnAbout and OnQuit are working, just not OnCompute or OnClear. I'm really frustrated as I can't figure this out. Thanks a bunch in advance! #include "wx/wx.h" #include "time.h" #include <string> using std::string; // create object of Time class Time first; class App: public wxApp { virtual bool OnInit(); }; class MainPanel : public wxPanel { public: // Constructor for panel class // Constructs my panel class // Params - wxWindow pointer // no return type // pre-conditions: none // post-conditions: none MainPanel(wxWindow* parent); // OnCompute is the event handler for the Compute button // params - none // preconditions - none // postconditions - tasks will have been carried otu successfully // returns void void OnCompute(wxCommandEvent& WXUNUSED(event)); // OnClear is the event handler for the Clear button // params - none // preconditions - none // postconditions - all text areas will be cleared of data // returns void void OnClear(wxCommandEvent& WXUNUSED(event)); // Destructor for panel class // params none // preconditions - none // postconditions - none // no return type ~MainPanel( ); private: wxStaticText *startLabel; wxStaticText *endLabel; wxStaticText *pCLabel; wxStaticText *newEndLabel; wxTextCtrl *start; wxTextCtrl *end; wxTextCtrl *pC; wxTextCtrl *newEnd; wxButton *compute; wxButton *clear; DECLARE_EVENT_TABLE() }; class MainFrame: public wxFrame { private: wxPanel *mainPanel; public: MainFrame(const wxString& title, const wxPoint& pos, const wxSize& size); void OnQuit(wxCommandEvent& event); void OnAbout(wxCommandEvent& event); ~MainFrame(); DECLARE_EVENT_TABLE() }; enum { ID_Quit = 1, ID_About, BUTTON_COMPUTE = 100, BUTTON_CLEAR = 200 }; IMPLEMENT_APP(App) BEGIN_EVENT_TABLE(MainFrame, wxFrame) EVT_MENU(ID_Quit, MainFrame::OnQuit) EVT_MENU(ID_About, MainFrame::OnAbout) END_EVENT_TABLE() BEGIN_EVENT_TABLE(MainPanel, wxPanel) EVT_MENU(BUTTON_COMPUTE, MainPanel::OnCompute) EVT_MENU(BUTTON_CLEAR, MainPanel::OnClear) END_EVENT_TABLE() bool App::OnInit() { MainFrame *frame = new MainFrame( _("Good Guys Delivery Time Calculator"), wxPoint(50, 50), wxSize(450,340) ); frame->Show(true); SetTopWindow(frame); return true; } MainPanel::MainPanel(wxWindow* parent) : wxPanel(parent) { startLabel = new wxStaticText(this, -1, "Start Time:", wxPoint(75, 35)); start = new wxTextCtrl(this, -1, "", wxPoint(135, 35), wxSize(40, 21)); endLabel = new wxStaticText(this, -1, "End Time:", wxPoint(200, 35)); end = new wxTextCtrl(this, -1, "", wxPoint(260, 35), wxSize(40, 21)); pCLabel = new wxStaticText(this, -1, "Percent Change:", wxPoint(170, 85)); pC = new wxTextCtrl(this, -1, "", wxPoint(260, 85), wxSize(40, 21)); newEndLabel = new wxStaticText(this, -1, "New End Time:", wxPoint(180, 130)); newEnd = new wxTextCtrl(this, -1, "", wxPoint(260, 130), wxSize(40, 21)); compute = new wxButton(this, BUTTON_COMPUTE, "Compute", wxPoint(135, 185), wxSize(75, 35)); clear = new wxButton(this, BUTTON_CLEAR, "Clear", wxPoint(230, 185), wxSize(75, 35)); } MainPanel::~MainPanel() {} MainFrame::MainFrame(const wxString& title, const wxPoint& pos, const wxSize& size) : wxFrame( NULL, -1, title, pos, size ) { mainPanel = new MainPanel(this); wxMenu *menuFile = new wxMenu; menuFile->Append( ID_About, _("&About...") ); menuFile->AppendSeparator(); menuFile->Append( ID_Quit, _("E&xit") ); wxMenuBar *menuBar = new wxMenuBar; menuBar->Append( menuFile, _("&File") ); SetMenuBar( menuBar ); CreateStatusBar(); SetStatusText( _("Hi") ); } MainFrame::~MainFrame() {} void MainFrame::OnQuit(wxCommandEvent& WXUNUSED(event)) { Close(TRUE); } void MainFrame::OnAbout(wxCommandEvent& WXUNUSED(event)) { wxMessageBox( _("Alex Olson\nProject 11"), _("About"), wxOK | wxICON_INFORMATION, this); } void MainPanel::OnCompute(wxCommandEvent& WXUNUSED(event)) { int startT; int endT; int newEndT; double tD; wxString startTString = start->GetValue(); wxString endTString = end->GetValue(); startT = wxAtoi(startTString); endT = wxAtoi(endTString); pC->GetValue().ToDouble(&tD); first.SetStartTime(startT); first.SetEndTime(endT); first.SetTimeDiff(tD); try { first.ValidateData(); newEndT = first.ComputeEndTime(); *newEnd << newEndT; } catch (BaseException& e) { wxMessageBox(_(e.GetMessage()), _("Something Went Wrong!"), wxOK | wxICON_INFORMATION, this); } } void MainPanel::OnClear(wxCommandEvent& WXUNUSED(event)) { start->Clear(); end->Clear(); pC->Clear(); newEnd->Clear(); }

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• jQuery.closest(); traversing down the DOM not up

  - by Alex

  Afternoon peoples. I am having a bit of a nightmare traversing a DOM tree properly. I have the following markup <div class="node" id="first-wh"> <div class="content-heading has-tools"> <div class="tool-menu" style="position: relative"> <span class="menu-open stepper-down"></span> <ul class="tool-menu-tools" style="display:none;"> <li><img src="/resources/includes/images/layout/tools-menu/edit22.png" /> Edit <input type="hidden" class="variables" value="edit,hobbies,text,/theurl" /></li> <li>Menu 2</li> <li>Menu 3</li> </ul> </div> <h3>Employment History</h3></div> <div class="content-body editable disabled"> <h3 class="dates">1st January 2010 - 10th June 2010</h3> <h3>Company</h3> <h4>Some Company</h4> <h3>Job Title</h3> <h4>IT Manager</h4> <h3>Job Description</h3> <p class="desc">I headed up the IT department for all things concerning IT and infrastructure</p> <h3>Roles &amp; Responsibilities</h3> <p class="desc">It is a long established fact that a reader will be distracted by the readable content of a page when looking at its layout. The point of using Lorem Ipsum is that it has a more-or-less normal distribution of letters, as opposed to using 'Content here, content here', making it look like readable English. Many desktop publishing packages and web page editors now use Lorem Ipsum as their default model text, and a search for 'lorem ipsum' will uncover many web sites still in their infancy. Various versions have evolved over the years, sometimes by accident, sometimes on purpose (injected humour and the like).</p> </div> <div class="content-body edit-node edit-node-hide"> <input class="variables" type="hidden" value="id,function-id" /> <h3 class="element-title">Employment Dates</h3> <span class="label">From:</span> <input class="edit-mode date date-from" type="text" value="date" /> <span class="label">To:</span> <input class="edit-mode date date-to" type="text" value="date" /> <h3 class="element-title">Company</h3> <input class="edit-mode" type="text" value="The company I worked for" /> <h3 class="element-title">Job Title</h3> <input class="edit-mode" type="text" value="My job title" /> <h3 class="element-title">Job Description</h3> <textarea class="edit-mode" type="text">The Job Title</textarea> <h3 class="element-title">Roles &amp; Responsibilities</h3> <textarea class="edit-mode" type="text">It is a long established fact that a reader will be distracted by the readable content of a page when looking at its layout. The point of using Lorem Ipsum is that it has a more-or-less normal distribution of letters, as opposed to using 'Content here, content here', making it look like readable English. Many desktop publishing packages and web page editors now use Lorem Ipsum as their default model text, and a search for 'lorem ipsum' will uncover many web sites still in their infancy. Various versions have evolved over the years, sometimes by accident, sometimes on purpose (injected humour and the like).</textarea> <div class="node-actions"> <input type="checkbox" class="checkdisable" value="This is a checkbox"/>This element is visible .<br /> <input type="submit" class="account-button save" value="Save" /> <input type="submit" class="account-button cancel" value="Cancel" /></div> </div></div> ... And I am trying to traverse from input.save at the bottom right the way up to div.node... This all works well with one copy of the markup but if I duplicate it (obvisouly changing the ID of the uppermost div.node and use jQuery.closest('div.node') for the upper of the div.node's it will return the element below it not the element above it (which is the right one). I've tried using parents() but that also has it's caveats. Is there some kind of contexyt that can be attached to closest to make it go up and not down? or is there a better way to do this. jQuery code below. $(".save").click(function(){ var element=$(this); var enodes=element.parents('.edit-node').find('input.variables'); var variables=enodes.val(); var onode=element.closest('div.node').find('.editable'); var enode=element.closest('div.node').find('.edit-node-hide'); var vnode=element.closest('div.node-actions').find('input.checkdisable'); var isvis=(vnode.is(":checked")) ? onode.removeClass('disabled') : onode.addClass('disabled'); onode.slideDown(200); enode.fadeOut(100); }); Thanks in advance. Alex P.S It seems that stackoverflow has done something weird to the markup! - I just triple checked it and it is fine but for some reason it's concate'd it below

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• OpenCL: Strange buffer or image bahaviour with NVidia but not Amd

  - by Alex R.

  I have a big problem (on Linux): I create a buffer with defined data, then an OpenCL kernel takes this data and puts it into an image2d_t. When working on an AMD C50 (Fusion CPU/GPU) the program works as desired, but on my GeForce 9500 GT the given kernel computes the correct result very rarely. Sometimes the result is correct, but very often it is incorrect. Sometimes it depends on very strange changes like removing unused variable declarations or adding a newline. I realized that disabling the optimization will increase the probability to fail. I have the most actual display driver in both systems. Here is my reduced code: #include <CL/cl.h> #include <string> #include <iostream> #include <sstream> #include <cmath> void checkOpenCLErr(cl_int err, std::string name){ const char* errorString[] = { "CL_SUCCESS", "CL_DEVICE_NOT_FOUND", "CL_DEVICE_NOT_AVAILABLE", "CL_COMPILER_NOT_AVAILABLE", "CL_MEM_OBJECT_ALLOCATION_FAILURE", "CL_OUT_OF_RESOURCES", "CL_OUT_OF_HOST_MEMORY", "CL_PROFILING_INFO_NOT_AVAILABLE", "CL_MEM_COPY_OVERLAP", "CL_IMAGE_FORMAT_MISMATCH", "CL_IMAGE_FORMAT_NOT_SUPPORTED", "CL_BUILD_PROGRAM_FAILURE", "CL_MAP_FAILURE", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "CL_INVALID_VALUE", "CL_INVALID_DEVICE_TYPE", "CL_INVALID_PLATFORM", "CL_INVALID_DEVICE", "CL_INVALID_CONTEXT", "CL_INVALID_QUEUE_PROPERTIES", "CL_INVALID_COMMAND_QUEUE", "CL_INVALID_HOST_PTR", "CL_INVALID_MEM_OBJECT", "CL_INVALID_IMAGE_FORMAT_DESCRIPTOR", "CL_INVALID_IMAGE_SIZE", "CL_INVALID_SAMPLER", "CL_INVALID_BINARY", "CL_INVALID_BUILD_OPTIONS", "CL_INVALID_PROGRAM", "CL_INVALID_PROGRAM_EXECUTABLE", "CL_INVALID_KERNEL_NAME", "CL_INVALID_KERNEL_DEFINITION", "CL_INVALID_KERNEL", "CL_INVALID_ARG_INDEX", "CL_INVALID_ARG_VALUE", "CL_INVALID_ARG_SIZE", "CL_INVALID_KERNEL_ARGS", "CL_INVALID_WORK_DIMENSION", "CL_INVALID_WORK_GROUP_SIZE", "CL_INVALID_WORK_ITEM_SIZE", "CL_INVALID_GLOBAL_OFFSET", "CL_INVALID_EVENT_WAIT_LIST", "CL_INVALID_EVENT", "CL_INVALID_OPERATION", "CL_INVALID_GL_OBJECT", "CL_INVALID_BUFFER_SIZE", "CL_INVALID_MIP_LEVEL", "CL_INVALID_GLOBAL_WORK_SIZE", }; if (err != CL_SUCCESS) { std::stringstream str; str << errorString[-err] << " (" << err << ")"; throw std::string(name)+(str.str()); } } int main(){ try{ cl_context m_context; cl_platform_id* m_platforms; unsigned int m_numPlatforms; cl_command_queue m_queue; cl_device_id m_device; cl_int error = 0; // Used to handle error codes clGetPlatformIDs(0,NULL,&m_numPlatforms); m_platforms = new cl_platform_id[m_numPlatforms]; error = clGetPlatformIDs(m_numPlatforms,m_platforms,&m_numPlatforms); checkOpenCLErr(error, "getPlatformIDs"); // Device error = clGetDeviceIDs(m_platforms[0], CL_DEVICE_TYPE_GPU, 1, &m_device, NULL); checkOpenCLErr(error, "getDeviceIDs"); // Context cl_context_properties properties[] = { CL_CONTEXT_PLATFORM, (cl_context_properties)(m_platforms[0]), 0}; m_context = clCreateContextFromType(properties, CL_DEVICE_TYPE_GPU, NULL, NULL, NULL); // m_private->m_context = clCreateContext(properties, 1, &m_private->m_device, NULL, NULL, &error); checkOpenCLErr(error, "Create context"); // Command-queue m_queue = clCreateCommandQueue(m_context, m_device, 0, &error); checkOpenCLErr(error, "Create command queue"); //Build program and kernel const char* source = "#pragma OPENCL EXTENSION cl_khr_byte_addressable_store : enable\n" "\n" "__kernel void bufToImage(__global unsigned char* in, __write_only image2d_t out, const unsigned int offset_x, const unsigned int image_width , const unsigned int maxval ){\n" "\tint i = get_global_id(0);\n" "\tint j = get_global_id(1);\n" "\tint width = get_global_size(0);\n" "\tint height = get_global_size(1);\n" "\n" "\tint pos = j*image_width*3+(offset_x+i)*3;\n" "\tif( maxval < 256 ){\n" "\t\tfloat4 c = (float4)(in[pos],in[pos+1],in[pos+2],1.0f);\n" "\t\tc.x /= maxval;\n" "\t\tc.y /= maxval;\n" "\t\tc.z /= maxval;\n" "\t\twrite_imagef(out, (int2)(i,j), c);\n" "\t}else{\n" "\t\tfloat4 c = (float4)(255.0f*in[2*pos]+in[2*pos+1],255.0f*in[2*pos+2]+in[2*pos+3],255.0f*in[2*pos+4]+in[2*pos+5],1.0f);\n" "\t\tc.x /= maxval;\n" "\t\tc.y /= maxval;\n" "\t\tc.z /= maxval;\n" "\t\twrite_imagef(out, (int2)(i,j), c);\n" "\t}\n" "}\n" "\n" "__constant sampler_t imageSampler = CLK_NORMALIZED_COORDS_FALSE | CLK_ADDRESS_CLAMP_TO_EDGE | CLK_FILTER_NEAREST;\n" "\n" "__kernel void imageToBuf(__read_only image2d_t in, __global unsigned char* out, const unsigned int offset_x, const unsigned int image_width ){\n" "\tint i = get_global_id(0);\n" "\tint j = get_global_id(1);\n" "\tint pos = j*image_width*3+(offset_x+i)*3;\n" "\tfloat4 c = read_imagef(in, imageSampler, (int2)(i,j));\n" "\tif( c.x <= 1.0f && c.y <= 1.0f && c.z <= 1.0f ){\n" "\t\tout[pos] = c.x*255.0f;\n" "\t\tout[pos+1] = c.y*255.0f;\n" "\t\tout[pos+2] = c.z*255.0f;\n" "\t}else{\n" "\t\tout[pos] = 200.0f;\n" "\t\tout[pos+1] = 0.0f;\n" "\t\tout[pos+2] = 255.0f;\n" "\t}\n" "}\n"; cl_int err; cl_program prog = clCreateProgramWithSource(m_context,1,&source,NULL,&err); if( -err != CL_SUCCESS ) throw std::string("clCreateProgramWithSources"); err = clBuildProgram(prog,0,NULL,"-cl-opt-disable",NULL,NULL); if( -err != CL_SUCCESS ) throw std::string("clBuildProgram(fromSources)"); cl_kernel kernel = clCreateKernel(prog,"bufToImage",&err); checkOpenCLErr(err,"CreateKernel"); cl_uint imageWidth = 8; cl_uint imageHeight = 9; //Initialize datas cl_uint maxVal = 255; cl_uint offsetX = 0; int size = imageWidth*imageHeight*3; int resSize = imageWidth*imageHeight*4; cl_uchar* data = new cl_uchar[size]; cl_float* expectedData = new cl_float[resSize]; for( int i = 0,j=0; i < size; i++,j++ ){ data[i] = (cl_uchar)i; expectedData[j] = (cl_float)i/255.0f; if ( i%3 == 2 ){ j++; expectedData[j] = 1.0f; } } cl_mem inBuffer = clCreateBuffer(m_context,CL_MEM_READ_ONLY|CL_MEM_COPY_HOST_PTR,size*sizeof(cl_uchar),data,&err); checkOpenCLErr(err, "clCreateBuffer()"); clFinish(m_queue); cl_image_format imgFormat; imgFormat.image_channel_order = CL_RGBA; imgFormat.image_channel_data_type = CL_FLOAT; cl_mem outImg = clCreateImage2D( m_context, CL_MEM_READ_WRITE, &imgFormat, imageWidth, imageHeight, 0, NULL, &err ); checkOpenCLErr(err,"get2DImage()"); clFinish(m_queue); size_t kernelRegion[]={imageWidth,imageHeight}; size_t kernelWorkgroup[]={1,1}; //Fill kernel with data clSetKernelArg(kernel,0,sizeof(cl_mem),&inBuffer); clSetKernelArg(kernel,1,sizeof(cl_mem),&outImg); clSetKernelArg(kernel,2,sizeof(cl_uint),&offsetX); clSetKernelArg(kernel,3,sizeof(cl_uint),&imageWidth); clSetKernelArg(kernel,4,sizeof(cl_uint),&maxVal); //Run kernel err = clEnqueueNDRangeKernel(m_queue,kernel,2,NULL,kernelRegion,kernelWorkgroup,0,NULL,NULL); checkOpenCLErr(err,"RunKernel"); clFinish(m_queue); //Check resulting data for validty cl_float* computedData = new cl_float[resSize];; size_t region[]={imageWidth,imageHeight,1}; const size_t offset[] = {0,0,0}; err = clEnqueueReadImage(m_queue,outImg,CL_TRUE,offset,region,0,0,computedData,0,NULL,NULL); checkOpenCLErr(err, "readDataFromImage()"); clFinish(m_queue); for( int i = 0; i < resSize; i++ ){ if( fabs(expectedData[i]-computedData[i])>0.1 ){ std::cout << "Expected: \n"; for( int j = 0; j < resSize; j++ ){ std::cout << expectedData[j] << " "; } std::cout << "\nComputed: \n"; std::cout << "\n"; for( int j = 0; j < resSize; j++ ){ std::cout << computedData[j] << " "; } std::cout << "\n"; throw std::string("Error, computed and expected data are not the same!\n"); } } }catch(std::string& e){ std::cout << "\nCaught an exception: " << e << "\n"; return 1; } std::cout << "Works fine\n"; return 0; } I also uploaded the source code for you to make it easier to test it: http://www.file-upload.net/download-3513797/strangeOpenCLError.cpp.html Please can you tell me if I've done wrong anything? Is there any mistake in the code or is this a bug in my driver? Best reagards, Alex

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• London-based IT Training company seeks developers interested in achieving Microsoft Certifications

  IT Training company MCP Guru, based near Canary Wharf, looking to fill last available places on several Microsoft courses.All certifications available. Learners can study in-class, at work or at home, on weekdays and weekends, day or night.All instructors possess several years software and web development experience, and all are fully licensed.Individual learners get 30% discount, groups of 2 or more get 50% discount.Hurry! Last few places remaining! Offer ends April 30th.Contact Jatinder at [email protected] you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• NSFetchedResultsController not processing certain section driven moves

  - by JK

  I utilize a NSFetchedResultsController (frc) with a Core Data store. I implement all the frc delegate methods. The table is sporadically updated by background threads. All the inserts, deletes and updates work fine, with the exception that updates to the frc's index key for rows toward to the bottom of the table (50 rows), do not result in a section move. e.g. if "name" is the index key and the name "Victor" is changed to "Alex", the victor row now shows the name Alex, but is not moved to the top of the table alongside all other names starting with A. As I noted, this is only for rows towards the bottom of the table. If a row like "Andy" is changed to "Ben", the move is indeed processed correctly by the frc. Any suggestions to fix this would be appreciated. I do not use a frc cache. Thanks

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• Minecraft Coding Pack: Stair block texture

  - by JamerTheProgrammer

  I have MCP setup and working nicely. I would like to make another stair block. I have copied the wooden stair block file and then pasted it and renamed it BlahStairBlock. I'm trying to set a texture for the stair block but it wont work. public int getBlockTextureFromSide(int side) { if(i==side) { // Workshop top return 43; } return blockIndexInTexture; } This is what I'm using to set the texture.... It just isn't working. Any ideas of why?

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• What is the trick in pAddress & ~(PAGE_SIZE - 1) to get the page's base address

  - by Dbger

  Following function is used to get the page's base address of an address which is inside this page: void* GetPageAddress(void* pAddress) { return (void*)((ULONG_PTR)pAddress & ~(PAGE_SIZE - 1)); } But I couldn't quite get it, what is the trick it plays here? Conclusion: Personally, I think Amardeep's explanation plus Alex B's example are best answers. As Alex B's answer has already been voted up, I would like to accept Amardeep's answer as the official one to highlight it! Thanks you all.

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• C++ game architecture

  - by rxc

  I'm trying to make a game, but I'm not sure of the best way to set up the main loop and classes. For really small games, I could put everything in the main() loop, including event handling, collision checking, etc. However, for large games, that's seems like a highly inefficient way to get things done. The architecture I want is kind like the way the Minecraft coders did it (I quote Minecraft code because I've seen the source code when downloading MCP). They have objects entity classes EntityCow and EntityChicken and they have methods like onDeath(), onLivingUpdate(); and item classes like ItemSword have methods like onItemUse(). I've never seen these methods get called directly, but apparently, they get stored in a class called DataWatcher, which, I think "watches" all the data (as the name implies) and calls the appropriate methods in the objects. Is that how most games do it? If so, how is the DataWatcher class implemented? Any help or alternate suggestions is really appreciated.

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• .NET Reflector 6, .NET Reflector Pro, TestDriven.NET, .NET 4.0 and Mono

  - by Bart Read

  By now you may well have noticed that .NET Reflector 6 and .NET Reflector Pro are out in the wild. The official launch happened today, although we actually put the software out last Thursday as part of a phased release plan to ensure that everything went smoothly today which, so far, it seems to have done. Clive and Alex have already talked extensively about what the new version and the Pro extension do, so I'm not going to go into any detail here, but I've linked to their blogs at the bottom. What...(read more)

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• South Florida Code Camp 2010 &ndash; VI &ndash; 2010-02-27

  - by Dave Noderer

  Catching up after our sixth code camp here in the Ft Lauderdale, FL area. Website at: http://www.fladotnet.com/codecamp. For the 5th time, DeVry University hosted the event which makes everything else really easy! Statistics from 2010 South Florida Code Camp: 848 registered (we use Microsoft Group Events) ~ 600 attended (516 took name badges) 64 speakers (including speaker idol) 72 sessions 12 parallel tracks Food 400 waters 600 sodas 900 cups of coffee (it was cold!) 200 pounds of ice 200 pizza's 10 large salad trays 900 mouse pads Photos on facebook Dave Noderer: http://www.facebook.com/home.php#!/album.php?aid=190812&id=693530361 Joe Healy: http://www.facebook.com/devfish?ref=mf#!/album.php?aid=202787&id=720054950 Will Strohl:http://www.facebook.com/home.php#!/album.php?aid=2045553&id=1046966128&ref=mf Veronica Gonzalez: http://www.facebook.com/home.php#!/album.php?aid=150954&id=672439484 Florida Speaker Idol One of the sessions at code camp was the South Florida Regional speaker idol competition. After user group level competitions there are five competitors. I acted as MC and score keeper while Ed Hill, Bob O’Connell, John Dunagan and Shervin Shakibi were judges. This statewide competition is being run by Roy Lawsen in Lakeland and the winner, Jeff Truman from Naples will move on to the state finals to be held at the Orlando Code Camp on 3/27/2010: http://www.orlandocodecamp.com/. Each speaker has 10 minutes. The participants were: Alex Koval Jeff Truman Jared Nielsen Chris Catto Venkat Narayanasamy They all did a great job and I’m working with each to make sure they don’t stop there and start speaking at meetings. Thanks to everyone involved! Volunteers As always events like this don’t happen without a lot of help! The key people were: Ed Hill, Bob O’Connell – DeVry For the months leading up to the event, Ed collects all of the swag, books, etc and stores them. He holds meeting with various DeVry departments to coordinate the day, he works with the students in the days  before code camp to stuff bags, print signs, arrange tables and visit BJ’s for our supplies (I go and pay but have a small car!). And of course the day of the event he is there at 5:30 am!! We took two SUV’s to BJ’s, i was really worried that the 36 cases of water were going to break his rear axle! He also helps with the students and works very hard before and after the event. Rainer Haberman – Speakers and Volunteer of the Year Rainer has helped over the past couple of years but this time he took full control of arranging the tracks. I did some preliminary work solicitation speakers but he took over all communications after that. We have tried various organizations around speakers, chair per track, central team but having someone paying attention to the details is definitely the way to go! This was the first year I did not have to jump in at the last minute and re-arrange everything. There were lots of kudo’s from the speakers too saying they felt it was more organized than they have experienced in the past from any code camp. Thanks Rainer! Ray Alamonte – Book Swap We saw the idea of a book swap from the Alabama Code Camp and thought we would give it a try. Ray jumped in and took control. The idea was to get people to bring their old technical books to swap or for others to buy. You got a ticket for each book you brought that you could then turn in to buy another book. If you did not have a ticket you could buy a book for $1. Net proceeds were $153 which I rounded up and donated to the Red Cross. There is plenty going on in Haiti and Chile! I don’t think we really got a count of how many books came in. I many cases the books barely hit the table before being picked up again. At the end we were left with a dozen books which we donated to the DeVry library. A great success we will definitely do again! Jace Weiss / Ratchelen Hut – Coffee and Snacks Wow, this was an eye opener. In past years a few of us would struggle to give some attention to coffee, snacks, etc. But it was always tenuous and always ended up running out of coffee. In the past we have tried buying Dunkin Donuts coffee, renting urns, borrowing urns, etc. This year I actually purchased 2 – 100 cup Westbend commercial brewers plus a couple of small urns (30 and 60 cup we used for decaf). We got them both started early (although i forgot to push the on button on one!) and primed it with 10 boxes of Joe from Dunkin. then Jace and Rachelen took over.. once a batch was brewed they would refill the boxes, keep the area clean and at one point were filling cups. We never ran out of coffee and served a few hundred more than last  year. We did look but next year I’ll get a large insulated (like gatorade) dispensing container. It all went very smoothly and having help focused on that one area was a big win. Thanks Jace and Rachelen! Ken & Shirley Golding / Roberta Barbosa – Registration Ken & Shirley showed up and took over registration. This year we printed small name tags for everyone registered which was great because it is much easier to remember someone’s name when they are labeled! In any case it went the smoothest it has ever gone. All three were actively pulling people through the registration, answering questions, directing them to bags and information very quickly. I did not see that there was too big a line at any time. Thanks!! Scott Katarincic / Vishal Shukla – Website For the 3rd?? year in a row, Scott was in charge of the website starting in August or September when I start on code camp. He handles all the requests, makes changes to the site and admin. I think two years ago he wrote all the backend administration and tunes it and the website a bit but things are pretty stable. The only thing I do is put up the sponsors. It is a big pressure off of me!! Thanks Scott! Vishal jumped into the web end this year and created a new Silverlight agenda page to replace the old ajax page. We will continue to enhance this but it is definitely a good step forward! Thanks! Alex Funkhouser – T-shirts/Mouse pads/tables/sponsors Alex helps in many areas. He helps me bring in sponsors and handles all the logistics for t-shirts, sponsor tables and this year the mouse pads. He is also a key person to help promote the event as well not to mention the after after party which I did not attend and don’t want to know much about! Students There were a number of student volunteers but don’t have all of their names. But thanks to them, they stuffed bags, patrolled pizza and helped with moving things around. Sponsors We had a bunch of great sponsors which allowed us to feed people and give a way a lot of great swag. Our major sponsors of DeVry, Microsoft (both DPE and UGSS), Infragistics, Telerik, SQL Share (End to End, SQL Saturdays), and Interclick are very much appreciated. The other sponsors Applied Innovations (also supply code camp hosting), Ultimate Software (a great local SW company), Linxter (reliable cloud messaging we are lucky to have here!), Mediascend (a media startup), SoftwareFX (another local SW company we are happy to have back participating in CC), CozyRoc (if you do SSIS, check them out), Arrow Design (local DNN and Silverlight experts),Boxes and Arrows (a local SW consulting company) and Robert Half. One thing we did this year besides a t-shirt was a mouse pad. I like it because it will be around for a long time on many desks. After much investigation and years of using mouse pad’s I’ve determined that the 1/8” fabric top is the best and that is what we got!   So now I get a break for a few months before starting again!

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• Silverlight Cream for March 20, 2010 -- #815

  - by Dave Campbell

  In this Issue: Andy Beaulieu(-2-, -3-), Alex Golesh, Damian Schenkelman, Adam Kinney(-2-), Jeremy Likness, Laurent Bugnion, and John Papa. Shoutouts: Adam Kinney has a good summary up of where to go for all the tools and toys: Install checklist for Silverlight 4 RC, Blend 4 Beta and Windows Phone Developer tools from MIX10 ... tons of links Laurent Bugnion had a few announcements at MIX10: MVVM Light V3 released at #MIX10, and he followed that with What’s new in MVVM Light V3 ... now for Windows Phone! Laurent Bugnion also has announced Sample code for my #mix10 talk online From SilverlightCream.com: Physics Games in Silverlight on Windows Phone 7 Andy Beaulieu has the Physics Helper working for WP7 already... read his post, check out all the links and get going on something fun... was great seeing you at MIX, too, Andy! Silverlight 4: GPU Accelerated PlaneProjection Andy Beaulieu has a comparison up of Plane Projection with and without the new GPU acceleration... be sure to read his notes section. Silverlight 4 PathListBox for Motion Path Animation Have you heard of the PathListBox? Well, showing is better than telling, so check out Andy Beaulieu's post on it Silverlight at Windows Phone 7 Alex Golesh has a quick overview on developing a Windows Phone 7 app in Silverlight using the new toys, and executiting it in the emulator Prism v2.1: Creating a Region Adapter for the Accordion control Damian Schenkelman shows how to use the Accordian control from the toolkit as a region in a Prism app. Expression Blend 4 Beta Feature Overview available for download Adam Kinney announced the presence of an Expression Blend whitepaper as well... you should go grab that too .toolbox – Free online Silverlight and Expression Blend training Want to improve your Silverlight chops or gain some Expression Blend chops? Check out .toolbox post that Adam Kinney posted Introducing the Visual State Aggregator Jeremy Likness describes the basic panel A/panel B problem, describes ways he and other folks have flipped between them, then describes his Visual State Aggregator ... and it's downloadable for you to give it a dance! Multithreading in Windows Phone 7 emulator: A bug Laurent Bugnion found a bug wit multi-threading on the Windows Phone emulator. He confirmed this with the team, and has a workaround you'll be needing... thanks Laurent. Silverlight Overview - Technical Whitepaper John Papa has reiterated the existence of this Silverlight 4 whitepaper ... it was updated this week, and we all should be aware of it. Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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• Silverlight Cream for April 17, 2010 -- #839

  - by Dave Campbell

  In this Issue: ITLackey, SilverLaw, Max Paulousky, Alex Yakhnin, Paul Sheriff, Douglas, Jeremy Likness, Tomasz Janczuk, Anoop Madhusudanan, Adam Kinney, and Ashish Shetty. Shoutout: If you haven't already seen it, CrocusGirl did a great job of summarizing Day 2 of DevConnections with her Silverlight 4 Launch Notes From SilverlightCream.com: RIA Services - IIS6 Virtual Directory Deployment ITLackey has a post up building on his previous post on Windows Authentication with RIA Services and discusses deploying to an IIS Virtual Directory. How To: Determine ChildWindow Position At Runtime - Silverlight 3 SilverLaw has a post up about determining the position of a ChildWindow at run-time, for example after the user moves it. Modularity in Silverlight Applications - An Issue With ModuleInitializeException – Part 2 Max Paulousky has part 2 of his series up on Modularity in Silverlight... he discusses using XAML as a catalog and registering modules at runtime, and compares to WPF. Creating LINQ Data Provider for WP7 (Part 1) Alex Yakhnin has a first cut at a LINQ Data Provider for WP7 ... I was expecting this to hit pretty soon, because we're all going to want it... check out the code and d/l the project. Synchronize Data between a Silverlight ListBox and a User Control Paul Sheriff demonstrates databinding in XAML between local data in a ListBox and a UserControl. The beginnings of Silverlight development with Expression Blend Douglas has a good post up on beginning your Silverlight development with Expression Blend. He covers a lot of ground in this post. Converting Silverlight 3 to Silverlight 4 Jeremy Likness has a video up demonstrating converting Silverlight 3 to Silverlight 4 with download links and also using commanding on buttons. Debugging WCF RIA Services with WCF traces Tomasz Janczuk has a post up discussing the use of WCF RIA Services traces to help diagnose and debug problems in a deployed service. Bing Maps + oData + Windows Phone 7 - Nerd Dinner Client For Windows Phone 7 Check out what Anoop Madhusudanan has provided... Nerd Dinner for WP7, including OData and BingMaps... just very cool! A few cool new features added in Expression Blend 4 RC Adam Kinney announced the availability of the new Expression Blend and highlights some of the new features... like MakeLayoutPath... FTW! Of Crashing and Sometimes Burning Ashish Shetty has a discourse posted about where the causes of errors might come from, what to expect from the platform, where to find crash dumps, and links to more reading. Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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• Daily tech links for .net and related technologies - June 1-3, 2010

  - by SanjeevAgarwal

  Daily tech links for .net and related technologies - June 1-3, 2010 Web Development Anti-Forgery Request Recipes For ASP.NET MVC And AJAX - Dixin ASP.NET MVC 2 Localization Complete Guide - Alex Adamyan Dynamically Structured ViewModels in ASP.NET MVC - Keith Brown ASP.NET MVC Time Planner is available at CodePlex - Gunnar Peipman Part 2 – A Cascading Hierarchical Field Template & Filter for Dynamic Data - Steve SharePoint Server 2010 Enterprise Content Management Resources - Andrew Connell Web...(read more)

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• Google I/O 2010 - Using Google Chrome Frame

  Google I/O 2010 - Using Google Chrome Frame Google I/O 2010 - Using Google Chrome Frame Chrome 201 Alex Russell Google Chrome Frame brings the HTML5 platform and fast Javascript performance to IE6, 7 & 8. This session will cover the latest on Google Chrome Frame, what it can do for you and your customers, how it can be used, and a sneak peak into what's planned next. For all I/O 2010 sessions, please go to code.google.com From: GoogleDevelopers Views: 4 0 ratings Time: 50:16 More in Science & Technology

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• Basic Defensive Database Programming Techniques

  We can all recognise good-quality database code: It doesn't break with every change in the server's configuration, or on upgrade. It isn't affected by concurrent usage, or high workload. In an extract from his forthcoming book, Alex explains just how to go about producing resilient TSQL code that works, and carries on working.

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• Basic Defensive Database Programming Techniques

  We can all recognize good-quality database code: It doesn't break with every change in the server's configuration, or on upgrade. It isn't affected by concurrent usage, or high workload. In an extract from his forthcoming book, Alex explains just how to go about producing resilient TSQL code that works, and carries on working.

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• Centaurus PC Guide To Building Custom Gaming Computer

  Getting all the right components to play your favorite games and fit in your budget - usually that is hard to do but not impossible with our guide. There are a lot of options and models to choose fro... [Author: Alex Raven - Computers and Internet - March 26, 2010]

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• How Marketing Consulting Firms can Generate SEO Bonuses

  Companies allot budgets for online Marketing Consulting Firms to expand the client base therefore resulting into more revenue. Most SEO professionals offer packages that are designed to improve websi... [Author: Alex Cross - Computers and Internet - March 27, 2010]

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• The Buzz at the JavaOne Bookstore

  - by Janice J. Heiss

  I found my way to the JavaOne bookstore, a hub of activity. Who says brick and mortar bookstores are dead? I asked what was hot and got two answers: Hadoop in Practice by Alex Holmes was doing well. And Scala for the Impatient by noted Java Champion Cay Horstmann also seemed to be a fast seller. Hadoop in PracticeHadoop is a framework that organizes large clusters of computers around a problem. It is touted as especially effective for large amounts of data, and is use such companies as  Facebook, Yahoo, Apple, eBay and LinkedIn. Hadoop in Practice collects nearly 100 Hadoop examples and presents them in a problem/solution format with step by step explanations of solutions and designs. It’s very much a participatory book intended to make developers more at home with Hadoop.The author, Alex Holmes, is a senior software engineer with more than 15 years of experience developing large-scale distributed Java systems. For the last four years, he has gained expertise in Hadoop solving Big Data problems across a number of projects. He has presented at JavaOne and Jazoon and is currently a technical lead at VeriSign.At this year’s JavaOne, he is presenting a session with VeriSign colleague, Karthik Shyamsunder called “Java: A Perfect Platform for Data Science” where they will explain how the Java platform has emerged as a perfect platform for practicing data science, and also talk about such technologies as Hadoop, Hive, Pig, HBase, Cassandra, and Mahout. Scala for the ImpatientSan Jose State University computer science professor and Java Champion Cay Horstmann is the principal author of the highly regarded Core Java. Scala for the Impatient is a basic, practical introduction to Scala for experienced programmers. Horstmann has a presentation summarizing the themes of his book on at his website. On the final page he offers an enticing summary of his conclusions:* Widespread dissatisfaction with Java + XML + IDEs               --Don't make me eat Elephant again * A separate language for every problem domain is not efficient               --It takes time to master the idioms* ”JavaScript Everywhere” isn't going to scale* Trend is towards languages with more expressive power, less boilerplate* Will Scala be the “one ring to rule them”?* Maybe              --If it succeeds in industry             --If student-friendly subsets and tools are created The popularity of both books echoed comments by IBM Distinguished Engineer Jason McGee who closed his part of the Sunday JavaOne keynote by pointing out that the use of Java in complex applications is increasingly being augmented by a host of other languages with strong communities around them – JavaScript, JRuby, Scala, Python and so forth. Java developers increasingly must know the strengths and weaknesses of such languages going forward.

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• Recording for the JVM Diagnostics & Configuration Management sessions

  - by ablyth

  Hi All The middleware team have posted recordings of their first 2 sessions from the iDemo series they are running ( MiddlewareTechTalk Blog). Check them out below! Please download the recording from the following links. Troubleshoot Java Memory Leaks with Oracle JVM Diagnostics9 June 2011, 2:04 pm Sydney Time, 53 mins Manage WebLogic Servers by Oracle Enterprise Manager & Configuration Manager16 June 2011, 1:59 pm Sydney Time, 49 minutes Cheers Alex

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• A Professional MP3 Tag Editor that is Fully Featured and Easy to Use

  Your music files can contain plenty of information that helps you to identify them. Using an MP3 tag editor you can add information to your music files such as the album name, artist, title, track nu... [Author: Alex Wisdom - Computers and Internet - March 27, 2010]

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• Defensive Error Handling

  TRY…CATCH error handling in SQL Server has certain limitations and inconsistencies that will trap the unwary developer, used to the more feature-rich error handling of client-side languages such as C# and Java. In this article, abstracted from his excellent new book, Defensive Database Programming with SQL Server, Alex Kuznetsov offers a simple, robust approach to checking and handling errors in SQL Server, with client-side error handling used to enforce what is done on the server.

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