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MUL instruction help

- by Tanner Babcock

I've read a few tutorials and examples, but I cannot wrap my head around how the MUL instruction works. I've used ADD and SUB without problems. So apparently this instruction multiplies its operand by the value in a register. What register (eax, ebp, esp, etc.) is multiplied by the first operand? And what register is the result stored in, so I can move it to the stack? Sorry, I'm just learning x86 assembly. When I try to compile this line... mull $9 I get, "Error: suffix or operands invalid for 'mul'". Can anyone help me out? Thanks. EDIT: OK Madhur, I replaced "mull" with "mul" and I'm still getting the same error. Here's the whole source. .globl _main _main: pushl %ebp movl %esp, %ebp subl $8, %esp movl $7, %eax mul $9 movl %eax, (%esp) call _putchar xorl %eax, %eax leave ret

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VS2010, VSS and post-commit hook?

- by David Lively

I'm using Visual Studio 2010 and VSS. Yes, I know VSS sucks. Hard. I'm attempting to force a move to TFS (since SVN integration with Expression and Sharepoint Designer is near impossible without forcing non-technical content managers to use TortoiseSVN), but that will not happen in the short term. I'm working with a local copy of the (classic ASP 3.0) site, and need to publish individual files to a web folder on our dev server whenever I check in a file so that the changes can be seen by other interested parties without having to publish from VSS. Does anyone know of a convenient way to add a post-commit script with VSS? It's acceptable for this script to run on my dev box (as opposed to the server), considering that VSS has no server to execute such actions.

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Delphi: Moving away from VSS

- by Mohammed Nasman

We are team of few Delphi developers who have been using VSS since years (I know it's a pity), but we don't use any of the advanced features of VCS, so it was working fine in many cases (but some times it was driving me crazy :( ). The good thing that we have with VSS that we use third-party plug-ings to integrate VSS with Delphi, which is working great, but now when our projects becomes larger, and we would like to move a way from VSS. I have looked at few other VCS (free and commercial) and found most of them seems be made for Linux guys, and you have to use command line for many admin work(I know I'm windows guy :P). What I'm looking for the new Version control that it should be easy to use and to maintain and Integrated nicely with Delphi IDE (D2007), or at least have a good UI for the Admins an developers.

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How to solve rake tasks deprecation on the rails plugin?

- by Dida

Because of the concept introduced in here, Rails::Plugin is nothing more than a Rails::Engine, but since it's loaded too late in the boot process, it does not have the same configuration powers as a bare Rails::Engine. Opposite to Rails::Railtie and Rails::Engine, you are not supposed to inherit from Rails::Plugin. Rails::Plugin is automatically configured to be an engine by simply placing inside vendor/plugins. Since this is done automatically, you actually cannot declare a Rails::Engine inside your Plugin, otherwise it would cause the same files to be loaded twice. This means that if you want to ship an Engine as gem it cannot be used as plugin and vice-versa. Besides this conceptual difference, the only difference between Rails::Engine and Rails::Plugin is that plugins automatically load the file "init.rb" at the plugin root during the boot process. rake tasks in the rails plugins are deprecated and it is advised to use lib/tasks instead. How to solve this? Can I just simply move the plugin's tasks to the lib/tasks?

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UITableView, force to snap to whole UITableViewCell at top of table

- by Adam Eberbach

I have a need to make a UITableView only display whole cells at the top of the cell, so when the table is moved or scrolled it should animate to make a whole cell visible at the top of the table if it has happened to stop with a cell partially off the top. This can be easily done using visibleCells and scrollToRowAtIndexPath methods of UITableView, BUT the cell should not always scroll down to move the partial cell into view - if the cell at top is more than 50% gone it should go completely with the next cell (i.e. index 1 in the array returned by visibleCells) moving to the top of the table. I've tried a few things to make this happen but I don't think I am understanding the way frame and bounds work between a UITableView and its UITableViewCells. Any help?

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jQuery UI Draggable-Droppable overflow:visible

- by Jeff

Sadly, I am unable to provide any JSFiddle for this issue, as I cant seem to reproduce it outside my project. I have a container where there are some boxes, that can be arranged using drag and drop, by utilizing jQuery UI. The problem is, that the container is overflow:auto; but it needs to be overflow:visible;, but if I do that, jQuery UI malfunctions. When a box drag is initiated, it will immediatly jump up aproximately 400-500px. This is how the draggable is created: $(".draggable").draggable({ revert: 'invalid', // when not dropped, the item will revert back to its initial position containment: '#editContainer', // stick to demo-frame if present helper: 'original', cursor: 'move' }); Is this a bug with jQuery UI, or can this be fixed on my end? I apologize for the lack of source code.

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Troubleshooting latency spikes on ESXi NFS datastores

- by exo_cw

I'm experiencing fsync latencies of around five seconds on NFS datastores in ESXi, triggered by certain VMs. I suspect this might be caused by VMs using NCQ/TCQ, as this does not happen with virtual IDE drives. This can be reproduced using fsync-tester (by Ted Ts'o) and ioping. For example using a Grml live system with a 8GB disk: Linux 2.6.33-grml64: root@dynip211 /mnt/sda # ./fsync-tester fsync time: 5.0391 fsync time: 5.0438 fsync time: 5.0300 fsync time: 0.0231 fsync time: 0.0243 fsync time: 5.0382 fsync time: 5.0400 [... goes on like this ...] That is 5 seconds, not milliseconds. This is even creating IO-latencies on a different VM running on the same host and datastore: root@grml /mnt/sda/ioping-0.5 # ./ioping -i 0.3 -p 20 . 4096 bytes from . (reiserfs /dev/sda): request=1 time=7.2 ms 4096 bytes from . (reiserfs /dev/sda): request=2 time=0.9 ms 4096 bytes from . (reiserfs /dev/sda): request=3 time=0.9 ms 4096 bytes from . (reiserfs /dev/sda): request=4 time=0.9 ms 4096 bytes from . (reiserfs /dev/sda): request=5 time=4809.0 ms 4096 bytes from . (reiserfs /dev/sda): request=6 time=1.0 ms 4096 bytes from . (reiserfs /dev/sda): request=7 time=1.2 ms 4096 bytes from . (reiserfs /dev/sda): request=8 time=1.1 ms 4096 bytes from . (reiserfs /dev/sda): request=9 time=1.3 ms 4096 bytes from . (reiserfs /dev/sda): request=10 time=1.2 ms 4096 bytes from . (reiserfs /dev/sda): request=11 time=1.0 ms 4096 bytes from . (reiserfs /dev/sda): request=12 time=4950.0 ms When I move the first VM to local storage it looks perfectly normal: root@dynip211 /mnt/sda # ./fsync-tester fsync time: 0.0191 fsync time: 0.0201 fsync time: 0.0203 fsync time: 0.0206 fsync time: 0.0192 fsync time: 0.0231 fsync time: 0.0201 [... tried that for one hour: no spike ...] Things I've tried that made no difference: Tested several ESXi Builds: 381591, 348481, 260247 Tested on different hardware, different Intel and AMD boxes Tested with different NFS servers, all show the same behavior: OpenIndiana b147 (ZFS sync always or disabled: no difference) OpenIndiana b148 (ZFS sync always or disabled: no difference) Linux 2.6.32 (sync or async: no difference) It makes no difference if the NFS server is on the same machine (as a virtual storage appliance) or on a different host Guest OS tested, showing problems: Windows 7 64 Bit (using CrystalDiskMark, latency spikes happen mostly during preparing phase) Linux 2.6.32 (fsync-tester + ioping) Linux 2.6.38 (fsync-tester + ioping) I could not reproduce this problem on Linux 2.6.18 VMs. Another workaround is to use virtual IDE disks (vs SCSI/SAS), but that is limiting performance and the number of drives per VM. Update 2011-06-30: The latency spikes seem to happen more often if the application writes in multiple small blocks before fsync. For example fsync-tester does this (strace output): pwrite(3, "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"..., 1048576, 0) = 1048576 fsync(3) = 0 ioping does this while preparing the file: [lots of pwrites] pwrite(3, "********************************"..., 4096, 1036288) = 4096 pwrite(3, "********************************"..., 4096, 1040384) = 4096 pwrite(3, "********************************"..., 4096, 1044480) = 4096 fsync(3) = 0 The setup phase of ioping almost always hangs, while fsync-tester sometimes works fine. Is someone capable of updating fsync-tester to write multiple small blocks? My C skills suck ;) Update 2011-07-02: This problem does not occur with iSCSI. I tried this with the OpenIndiana COMSTAR iSCSI server. But iSCSI does not give you easy access to the VMDK files so you can move them between hosts with snapshots and rsync. Update 2011-07-06: This is part of a wireshark capture, captured by a third VM on the same vSwitch. This all happens on the same host, no physical network involved. I've started ioping around time 20. There were no packets sent until the five second delay was over: No. Time Source Destination Protocol Info 1082 16.164096 192.168.250.10 192.168.250.20 NFS V3 WRITE Call (Reply In 1085), FH:0x3eb56466 Offset:0 Len:84 FILE_SYNC 1083 16.164112 192.168.250.10 192.168.250.20 NFS V3 WRITE Call (Reply In 1086), FH:0x3eb56f66 Offset:0 Len:84 FILE_SYNC 1084 16.166060 192.168.250.20 192.168.250.10 TCP nfs > iclcnet-locate [ACK] Seq=445 Ack=1057 Win=32806 Len=0 TSV=432016 TSER=769110 1085 16.167678 192.168.250.20 192.168.250.10 NFS V3 WRITE Reply (Call In 1082) Len:84 FILE_SYNC 1086 16.168280 192.168.250.20 192.168.250.10 NFS V3 WRITE Reply (Call In 1083) Len:84 FILE_SYNC 1087 16.168417 192.168.250.10 192.168.250.20 TCP iclcnet-locate > nfs [ACK] Seq=1057 Ack=773 Win=4163 Len=0 TSV=769110 TSER=432016 1088 23.163028 192.168.250.10 192.168.250.20 NFS V3 GETATTR Call (Reply In 1089), FH:0x0bb04963 1089 23.164541 192.168.250.20 192.168.250.10 NFS V3 GETATTR Reply (Call In 1088) Directory mode:0777 uid:0 gid:0 1090 23.274252 192.168.250.10 192.168.250.20 TCP iclcnet-locate > nfs [ACK] Seq=1185 Ack=889 Win=4163 Len=0 TSV=769821 TSER=432716 1091 24.924188 192.168.250.10 192.168.250.20 RPC Continuation 1092 24.924210 192.168.250.10 192.168.250.20 RPC Continuation 1093 24.924216 192.168.250.10 192.168.250.20 RPC Continuation 1094 24.924225 192.168.250.10 192.168.250.20 RPC Continuation 1095 24.924555 192.168.250.20 192.168.250.10 TCP nfs > iclcnet_svinfo [ACK] Seq=6893 Ack=1118613 Win=32625 Len=0 TSV=432892 TSER=769986 1096 24.924626 192.168.250.10 192.168.250.20 RPC Continuation 1097 24.924635 192.168.250.10 192.168.250.20 RPC Continuation 1098 24.924643 192.168.250.10 192.168.250.20 RPC Continuation 1099 24.924649 192.168.250.10 192.168.250.20 RPC Continuation 1100 24.924653 192.168.250.10 192.168.250.20 RPC Continuation 2nd Update 2011-07-06: There seems to be some influence from TCP window sizes. I was not able to reproduce this problem using FreeNAS (based on FreeBSD) as a NFS server. The wireshark captures showed TCP window updates to 29127 bytes in regular intervals. I did not see them with OpenIndiana, which uses larger window sizes by default. I can no longer reproduce this problem if I set the following options in OpenIndiana and restart the NFS server: ndd -set /dev/tcp tcp_recv_hiwat 8192 # default is 128000 ndd -set /dev/tcp tcp_max_buf 1048575 # default is 1048576 But this kills performance: Writing from /dev/zero to a file with dd_rescue goes from 170MB/s to 80MB/s. Update 2011-07-07: I've uploaded this tcpdump capture (can be analyzed with wireshark). In this case 192.168.250.2 is the NFS server (OpenIndiana b148) and 192.168.250.10 is the ESXi host. Things I've tested during this capture: Started "ioping -w 5 -i 0.2 ." at time 30, 5 second hang in setup, completed at time 40. Started "ioping -w 5 -i 0.2 ." at time 60, 5 second hang in setup, completed at time 70. Started "fsync-tester" at time 90, with the following output, stopped at time 120: fsync time: 0.0248 fsync time: 5.0197 fsync time: 5.0287 fsync time: 5.0242 fsync time: 5.0225 fsync time: 0.0209 2nd Update 2011-07-07: Tested another NFS server VM, this time NexentaStor 3.0.5 community edition: Shows the same problems. Update 2011-07-31: I can also reproduce this problem on the new ESXi build 4.1.0.433742.

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Visual Studio 2005 - Debugger stopped working.

- by eric

More fun and pain with Visual Studio. Visual Studio 2005. About two months ago, I started an assignment. In my role, I cannot install or configure development software. Trust me this has given me plenty of heartburn. No IIS is involved here, just File Sharing. That being said, when I first started I had a problem with my debugger not working. The debugger just stopped. I was able to get it working. Now the problem has returned and I am pulling every last hair on my head. Almost none of my symbols loads. It can't find the PDB files. In Debugger options, I checked the Symbol section. My symbol file location entry is completely blank. ? I don't know why. I did not touch this prior to the problem occurring. I have cleared the Temporary ASP.NET folders. Example: Here is my Module Output CppCodeProvider.dll C:\Windows\assembly\GAC_MSIL\CppCodeProvider\8.0.0.0__b03f5f7f11d50a3a\CppCodeProvider.dll No No Cannot find or open the PDB file. 17 8.0.50727.762 12/2/2006 4:23 AM 6A510000-6A52C000 [1844] WebDev.WebServer.EXE: Managed WebDev.WebHost.dll C:\Windows\assembly\GAC_32\WebDev.WebHost\8.0.0.0__b03f5f7f11d50a3a\WebDev.WebHost.dll No No Cannot find or open the PDB file. 3 8.0.50727.42 9/23/2005 4:20 AM 6D040000-6D050000 [1844] WebDev.WebServer.EXE: Managed So I enabled the SHFUSION.dll in my versio of the the Framework I am using... In my GAC, I can see this version of WebDev.WebHost.dll for example: ProcessArchitecture(x86) Public key token matches: b03f5f7f11d50a3a 8.0.50727.42 I then see some custom dlls. I should note, I created a new project. Recreated my files manually by importing them. The debugger worked 5 times and died. I'm at a loss of what to do next? The obvious has been checked: The project is set to Debug Configuration Manager Configuration Debug Platform .NET Build : checked. Web.Config: I have attempted to manually attach to the Webdev process from the Debug window and that doesn't work. I have googled this and this problem seems to occur quite a bit.

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Recording user data for heatmap with javascript

- by Hanpan

Hi, I was wondering how sites such as crazyegg.com store user click data during a session. Obviously there is some underlying script which is storing each clicks data, but how is that data then populated into a database? It seems to me the simple solution would be to send data via AJAX but when you consider that it's almost impossible to get a cross browser page unload function setup, I'm wondering if there is perhaps some other more advanced way of getting metric data. I even saw a site which records each mouse movement and I am guessing they are definitely not sending that data to a database on each mouse move event. So, in a nutshell, what kind of technology would I need in order to monitor user activity on my site and then store this information in order to create metric data? I am not looking to recreate GA, I'm just very interested to know how this sort of thing is done. Thanks in advance

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iframe as scriptaculous droppable

- by Nathan

I have a sortable list and an iframe on the same page. What I'm trying to do is define the <iframe> as a Droppable. Everything works with out errors but when I try to drag a sortable item across the Iframe it stops at the edge. ( if I move it slowly it seems works in firefox) The Iframe is set to DesignMode ="on" so covering it with a transparent element to act as the droppable does not seem applicable here. Anyone know of any other solutions or a better way to handle this?

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moving SDL video surface

- by runrunraygun

Does anyone know how to move my SDL.net video surface around the screen programtically? Surface videoContext = Video.SetVideoMode(1024, 768, 32, false, false, false, true, true); var a = System.Windows.Forms.Control.FromHandle(Video.WindowHandle); var b = System.Windows.Forms.NativeWindow.FromHandle(Video.WindowHandle); I can't find any properties in Surface or Video which do the job, and FromHandle is returning Null. The window is initializing falling off the bottom of the screen. Any ideas?

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How to transfer large amount of data using WCF?

- by JSprang

We are currently trying to move large amounts of data to a Silverlight 3 client using WCF with PollingDuplex. I have read about the MultiplerMessagesPerPoll in Silverlight 4 and it appears to be quite a bit faster. Are there any examples out there for me to reference (using MultipleMessagesPerPoll)? Or maybe some good references on using Net.TCP? Maybe I should be taking a completely different approach? Any ideas or suggestions would be greatly appreciated. Thanks!

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User Interface design books/resources for programmers

- by mmacaulay

Hi, I'm going to make my monthly trip to the bookstore soon and I'm kind of interested in learning some user interface and/or design stuff - mostly web related, what are some good books I should look at? One that I've seen come up frequently in the past is Don't Make Me Think, which looks promising. I'm aware of the fact that programmers often don't make great designers, and as such this is more of a potential hobby thing than a move to be a professional designer. I'm also looking for any good web resources on this topic. I subscribed to Jakob Nielsen's Alertbox newsletter, for instance, although it seems to come only once a month or so. Thanks! Somewhat related questions: http://stackoverflow.com/questions/75863/what-are-the-best-resources-for-designing-user-interfaces http://stackoverflow.com/questions/7973/user-interface-design

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jquery ui get id of child element of dragged element, when dropped

- by Catfish

I've read through many of the drag and drop threads on SO and i haven't found one that tells me how to get the child element id of the dragged element, when the dragged element is dropped. For example if you have <div id='drag'> <img id="something"/>//how do i get this id when #drag is dropped? </div> <div id='drop'> </div> and the js $('#drag').draggable({ containment: '#content', scrollSensitivity: 60, revert: 'invalid', cursor: 'move' }); $('#drop').droppable({ accept: '#albumImgs li', activeClass: 'dropContainerOpen', drop: function(event, ui) { var fileName = $(ui.draggable.attr('alt')); console.log(fileName); } });

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FLex MouseEvent doesn't fire when Mouse stays over element

- by Tomaszewski

Hi, i'm trying to make a scrollable box, when a mouse enters and STAYS on "wrapper"'s area, "pubsBox" moves 10 pixels to the left. <mx:Canvas id="wrapper" height="80" width="750"> <mx:HBox id="pubsBox" horizontalGap="10" height="80" width="100%" /> </mx:Canvas> My problem is that I'm not sure how to make the MouseEvent.MOUSE_OVER work, to recognize that the mouse is still ON the area and so pubsBox should continue to move 10 pixels to the left every second. I understand that i have to use a Timer, but what I'm concerned about is the fact that I can't get Flex to recognize that the mouse is still OVER "wrapper" and continue firing the event. Any ideas?

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HMAC SHA1 ColdFusion

- by Chris

Please help! I have been pulling out my hair over this one. :) I have a site that I need to HMAC SHA1 for authentication. It currently works with another language but now I need to move it to ColdFusion. For the life of me I cannot get the strings to match. Any assistance would be much appreciated. Data: https%3A%2F%2Fwww%2Etestwebsite%2Ecom%3Fid%3D5447 Key: 265D5C01D1B4C8FA28DC55C113B4D21005BB2B348859F674977B24E0F37C81B05FAE85FB75EA9CF53ABB9A174C59D98C7A61E2985026D2AA70AE4452A6E3F2F9 Correct answer: WJd%2BKxmFxGWdbw4xQJZXd3%2FHkFQ%3d My answer: knIVr6wIt6%2Fl7mBJPTTbwQoTIb8%3d Both are Base64 encoded and then URL encoded.

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How can I stop my "headerSticky" and "content" divs from overlapping?

- by danielle

I'm making a page that has three main components: a "headerSticky" header div, "sidenav" left navigation div, and "content" div. The side navigation is fixed and does not move; but the content div should be scrollable on its own. However, the top of the content div is always overlapped by the header div. Here is the CSS for the header: #headerSticky{ float:top; position:fixed; padding:6px; width: 100%;} and the content div: #content { padding-top: 100px; float:right; overflow: auto; height: 90%; width: 840px; padding: 0 20px 20px;} Any help would be appreciated. Thank you!

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mod_rewrite to find missing /img/foo.jpg in /img/f/

- by Ambrose

I've got a folder of images which is reaching a critical mass after a few years. I want to move images into alphabetical folders, so that /img/foo.jpg goes into /img/f/foo.jpg and /img/bar.jpg goes into /img/b/bar.jpg and so on. In order to make the transition smooth, and to allow the manual uploaders to put stuff into the top level, I'd like to use mod_rewrite to do this: if /img/foo.jpg exists, serve it up, if not look for it in /img/f/foo.jpg thanks for any suggestions. For the record, no, I don't think we need to go /img/f/fo/foo.jpg just yet.

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RMI-applets - Cannot understand error message

- by aeter

In a simple RMI game I'm writing (an assignment in uni), I reveice: java.rmi.MarshalException: error marshalling arguments; nested exception is: java.net.SocketException: Broken pipe at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:138) at java.rmi.server.RemoteObjectInvocationHandler.invokeRemoteMethod(RemoteObjectInvocationHandler.java:178) at java.rmi.server.RemoteObjectInvocationHandler.invoke(RemoteObjectInvocationHandler.java:132) at $Proxy2.drawWorld(Unknown Source) at PlayerServerImpl$1.actionPerformed(PlayerServerImpl.java:180) at javax.swing.Timer.fireActionPerformed(Timer.java:271) at javax.swing.Timer$DoPostEvent.run(Timer.java:201) at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209) at java.awt.EventQueue.dispatchEvent(EventQueue.java:597) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161) at java.awt.EventDispatchThread.run(EventDispatchThread.java:122) The error message appears after the second Player is registered with the RMI Server and the server starts to send the image (the array of pixels) to the 2 applets. The PlayerImpl and the PlayerServerImpl both extend UnicastRemoteObject. I have been struggling with other error messages for some time now, but I cannot understand how to troubleshoot this one. Please help. The relevant parts of the code are: PlayerServerImpl.java: ... timer = new Timer(10, new ActionListener() { // every 10 milliseconds do: @Override public void actionPerformed(ActionEvent e) { ... BufferedImage buff_image = new BufferedImage(GAME_APPLET_WIDTH, GAME_APPLET_HEIGHT, BufferedImage.TYPE_INT_RGB); // create a graphics context on the buffered image Graphics buff_g = buff_image.createGraphics(); ... // draw the score somewhere on the screen buff_g.drawString(score, GAME_APPLET_WIDTH - 20, 10); ... int[] rgbs = new int[GAME_APPLET_WIDTH * GAME_APPLET_HEIGHT]; int imgPixelsGrabbed[] = buff_image.getRGB(0,0,GAME_APPLET_WIDTH,GAME_APPLET_HEIGHT,rgbs,0,GAME_APPLET_WIDTH); // send the new state to the applets for (Player player : players) { player.drawWorld(imgPixelsGrabbed); System.out.println("Sent image to player"); } PlayerImpl.java: private PlayerApplet applet; public PlayerImpl(PlayerApplet applet) throws RemoteException { super(); this.applet = applet; } ... @Override public void drawWorld(int[] imgPixelsGrabbed) throws RemoteException { applet.setWorld(imgPixelsGrabbed); applet.repaint(); } ... PlayerApplet.java: ... private int[] world; // an array of pixels for the new image to be drawn ... // register players player = new PlayerImpl(applet); String serverIPAddressPort = ipAddressField.getText(); if (validateIPAddressPort(serverIPAddressPort)) { server = (PlayerServer) Naming.lookup("rmi://" + serverIPAddressPort + "/PlayerServer"); server.register(player); idPlayer = server.sendPlayerID(); ... @Override public void update(Graphics g) { buff_img = createImage((ImageProducer) new MemoryImageSource(getWidth(), getHeight(), world, 0, getWidth())); Graphics gr = buff_img.getGraphics(); paint(gr); g.drawImage(buff_img, 0, 0, this); } public void setWorld(int[] world) { this.world = world; }

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Get a tableview insertRowsAtIndexPaths to accept indexOfObject?

- by Emil

Hey. I have a code snippet that looks like this: [tableView beginUpdates]; [tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationLeft]; [tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:[array indexOfObject:[array objectAtIndex:indexPath.row]]] withRowAnimation:UITableViewRowAnimationLeft]; [tableView endUpdates]; [tableView reloadData]; It gets executed when a user clicks on an accessory. The first part is only there to provide a smooth animation, and does not really matter, as the tableView is reloaded milliseconds later, but as I said, it's there to provide an animation. It is supposed to move a selected object from its current indexPath to the value from an array at the same indexPath. Obviously, this code does not work, so I just want to know what can be done to fix it? PS: I get a warning when compiling, too. The usual "passing argument 1 of 'arrayWithObject:' makes pointer from integer without a cast..." (line 3)

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Upgrade from Delphi 2007 to Delphi 2010?

- by Nik

What should I worry about if I move to Delphi 2007 to 2010? I've checked this article and there was a lot of interesting stuff but not precisely for this jump that I need. To clarify my question and situation: I have all 3td party components' code. I will need the unicode, but not this year. I need win 7 support - themes, form resize problems and etc. I will be happy to have a dissent help system. Is ADO (dbGO) improved? What headache to expect? Thanks!

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Closest Approach question for math/physics heads

- by Kyle

I'm using a Segment to Segment closest approach method which will output the closest distance between two segments of length. These objects are moving at variable speed each, so even when it succeeds I'm currently using a 10-step method and calculating the distance between 2 spheres as they move along the two segments. So, basically the length of each segment is the object's traverse in the physics step, and the radius is the objects radius. By stepping, I can tell where they collide, and if they collide (Sort of; for the MOST part.).. I get the feeling that there could be something better. While I sort of believe that the first closest approach call is required, I think that the method immediately following it is a TAD weak. Can anyone help me out? I can illustrate this if needed. Thanks alot!

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XNA, WPF light show visualizer

- by Bgnt44

HI all, I'm developing a software to control light show ( through DMX protocol ), i use C# and wpf to develop my main software (.net 4.0) To help people preview their show, i would like to make a live 3D visualizer... First, i thought that i could use wpf 3D to make the visualizer, but i need to work with light .. My main application should send property ( beam angle, orientation (X,Y), position(X,Y), Brush ( color,shape,effect)) to the 3D visualizer But i would like to be able to move light (position in the scene) by mouse during execution and had value in return... So .. Does XNA is the easiest way to doing that ? Can you help me for that : Generating light (orientation , bitmap like filter in front of light ) Dynamically moving object with mouse and get position in return Dynamically add or remove fixture All of your advice, sample, example are very welcome ... I don't espect to have a perfect result at the first time but i need to understand the main concepts for doing that Thank You !!

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Operand size conflict in x86 Assembly??

- by Mark V.

I'm a novice programmer who is attempting assembly for the first time. Sorry in advance if this is an incredibly lame question. I have a character stored in the EAX register, but I need to move it to my DL register. When I try: mov dl, eax I get an error C2443: operand size conflict. I know that the eax register is 32 bit while the dl is 8 bit... am I on to something?? How do I go about solving this.

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Set focus and carret position in textarea according to mouse position, as if user had clicked

- by JeanHuguesRobert

Once a page with a textarea is loaded, I want some textarea to have the focus immediatly if the mouse cursor is inside that textarea. This is the easy part because a onmousehover handler can set the focus. Now, how to I also set the position of the caret? I would like the caret to be where it would be if the user had clicked using the mouse to set the focus/caret. The basic use case is : User clicks on a link and waits (mouse barely moves) A page is delivered, it contains a big textarea only, full of text User types using keyboard Characters are inserted right below the mouse cursor Today the user has to wait until the caret is visible (at the top left of the textarea) and then click to move the caret before typing. Thanks!

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