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  • vs2002: c# multi threading question..

    - by dotnet-practitioner
    I would like to invoke heavy duty method dowork on a separate thread and kill it if its taking longer than 3 seconds. Is there any problem with the following code? class Class1 { /// <summary> /// The main entry point for the application. /// </summary> /// [STAThread] static void Main(string[] args) { Console.WriteLine("starting new thread"); Thread t = new Thread(new ThreadStart(dowork)); t.Start(); DateTime start = DateTime.Now; TimeSpan span = DateTime.Now.Subtract(start); bool wait = true; while (wait == true) { if (span.Seconds>3) { t.Abort(); wait = false; } span = DateTime.Now.Subtract(start); } Console.WriteLine("ending new thread after seconds = {0}", span.Seconds); Console.WriteLine("all done"); Console.ReadLine(); } static void dowork() { Console.WriteLine("doing heavy work inside hello"); Thread.Sleep(7000); Console.WriteLine("*** finished**** doing heavy work inside hello"); } }

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  • Multi threading question..

    - by dotnet-practitioner
    I would like to invoke heavy duty method dowork on a separate thread and kill it if its taking longer than 3 seconds. Is there any problem with the following code? class Class1 { /// <summary> /// The main entry point for the application. /// </summary> [STAThread] static void Main(string[] args) { Console.WriteLine("starting new thread"); Thread t = new Thread(new ThreadStart(dowork)); t.Start(); DateTime start = DateTime.Now; TimeSpan span = DateTime.Now.Subtract(start); bool wait = true; while (wait == true) { if (span.Seconds > 3) { t.Abort(); wait = false; } span = DateTime.Now.Subtract(start); } Console.WriteLine("ending new thread after seconds = {0}", span.Seconds); Console.WriteLine("all done"); Console.ReadLine(); } static void dowork() { Console.WriteLine("doing heavy work inside hello"); Thread.Sleep(7000); Console.WriteLine("*** finished**** doing heavy work inside hello"); } }

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  • touch multi UIViews

    - by user262325
    Hello everyone There are a series UIViews arranaged very close. I hope when my finger touchs some of them, my app can detect which UIView touched. Maybe one or two or three.(because the displayed parts of each UIView are too thin). I hope to get the middle x value of the touch, then spread the UIView where the middle x value locates and the UIViews near it. Welcome any comment Thanks interdev

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  • trying to switch beginning of an array with another

    - by user1874574
    I have a problem where i am trying to swap two arrays so that they switch beginnings. example: array 1 = (1,2,3,4,5,6,7,8) and array 2 = (11,12,13,14,15,16,17,18) i want to end up with the first array being (11,12,13,14,5,6,7,8) and i want the second array to be (1,2,3,4,15,16,17,18) but for some reason i end up with 1=(11,12,13,14,5,6,7,8) and 2=(11,12,13,14,15,16,17,18) my code is provided below, what am i doing wrong? public static void Mutate(Genetic lowest, Genetic secondLowest) { int halfway = (lowest.getPopulation().length)/2; int[] one = lowest.getPopulation(); int[] two = secondLowest.getPopulation(); int[] temp = secondLowest.getPopulation(); int[] temp2 = lowest.getPopulation(); for(int i = 0; i < halfway; i++){ temp[i] = one[i]; } lowest.setPopulation(temp); for(int i = 0; i < lowest.getPopulation().length; i++){ System.out.print(temp[i]); } System.out.println(); for(int i = 0; i < halfway; i++){ temp2[i] = two[i]; } for(int i = 0; i < lowest.getPopulation().length; i++){ System.out.print(temp2[i]); } }

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  • Changing Value of Array Pointer When Passed to a Function

    - by ZAX
    I have a function which receives both the array, and a specific instance of the array. I try to change the specific instance of the array by accessing one of its members "color", but it does not actually change it, as can be seen by debugging (checking the value of color after function runs in the main program). I am hoping someone can help me to access this member and change it. Essentially I need the instance of the array I'm specifying to be passed by reference if nothing else, but I'm hoping there is an easier way to accomplish what I'm trying to do. Here's the structures: typedef struct adjEdge{ int vertex; struct adjEdge *next; } adjEdge; typedef struct vertex{ int sink; int source; int color; //0 will be white, 1 will be grey, 5 will be black int number; adjEdge *nextVertex; } vertex; And here is the function: void walk(vertex *vertexArray, vertex v, int source, maxPairing *head) { int i; adjEdge *traverse; int moveVertex; int sink; traverse = vertexArray[v.number-1].nextVertex; if(v.color != 5 && v.sink == 5) { sink = v.number; v.color = 5; addMaxPair(head, source, sink); } else { walk(vertexArray, vertexArray[traverse->vertex-1], source, head); } } In particular, v.color needs to be changed to a 5, that way later after recursion the if condition blocks it.

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  • [PHP] Does unsetting array values during iterating save on memory?

    - by saturn_rising
    Hello fellow code warriors, This is a simple programming question, coming from my lack of knowledge of how PHP handles array copying and unsetting during a foreach loop. It's like this, I have an array that comes to me from an outside source formatted in a way I want to change. A simple example would be: $myData = array('Key1' => array('value1', 'value2')); But what I want would be something like: $myData = array([0] => array('MyKey' => array('Key1' => array('value1', 'value2')))); So I take the first $myData and format it like the second $myData. I'm totally fine with my formatting algorithm. My question lies in finding a way to conserve memory since these arrays might get a little unwieldy. So, during my foreach loop I copy the current array value(s) into the new format, then I unset the value I'm working with from the original array. E.g.: $formattedData = array(); foreach ($myData as $key => $val) { // do some formatting here, copy to $reformattedVal $formattedData[] = $reformattedVal; unset($myData[$key]); } Is the call to unset() a good idea here? I.e., does it conserve memory since I have copied the data and no longer need the original value? Or, does PHP automatically garbage collect the data since I don't reference it in any subsequent code? The code runs fine, and so far my datasets have been too negligible in size to test for performance differences. I just don't know if I'm setting myself up for some weird bugs or CPU hits later on. Thanks for any insights. -sR

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  • Failed MDADM Array With Ext.4 Partition - "e2fsck: unable to set superblock flags on /dev/md0"

    - by Matthew Hodgkins
    Had a power failure and now my mdadm array is having problems. sudo mdadm -D /dev/md0 [hodge@hodge-fs ~]$ sudo mdadm -D /dev/md0 /dev/md0: Version : 0.90 Creation Time : Sun Apr 25 01:39:25 2010 Raid Level : raid5 Array Size : 8790815232 (8383.57 GiB 9001.79 GB) Used Dev Size : 1465135872 (1397.26 GiB 1500.30 GB) Raid Devices : 7 Total Devices : 7 Preferred Minor : 0 Persistence : Superblock is persistent Update Time : Sat Aug 7 19:10:28 2010 State : clean, degraded, recovering Active Devices : 6 Working Devices : 7 Failed Devices : 0 Spare Devices : 1 Layout : left-symmetric Chunk Size : 128K Rebuild Status : 10% complete UUID : 44a8f730:b9bea6ea:3a28392c:12b22235 (local to host hodge-fs) Events : 0.1307608 Number Major Minor RaidDevice State 0 8 81 0 active sync /dev/sdf1 1 8 97 1 active sync /dev/sdg1 2 8 113 2 active sync /dev/sdh1 3 8 65 3 active sync /dev/sde1 4 8 49 4 active sync /dev/sdd1 7 8 33 5 spare rebuilding /dev/sdc1 6 8 16 6 active sync /dev/sdb sudo mount -a [hodge@hodge-fs ~]$ sudo mount -a mount: wrong fs type, bad option, bad superblock on /dev/md0, missing codepage or helper program, or other error In some cases useful info is found in syslog - try dmesg | tail or so sudo fsck.ext4 /dev/md0 [hodge@hodge-fs ~]$ sudo fsck.ext4 /dev/md0 e2fsck 1.41.12 (17-May-2010) fsck.ext4: Group descriptors look bad... trying backup blocks... /dev/md0: recovering journal fsck.ext4: unable to set superblock flags on /dev/md0 sudo dumpe2fs /dev/md0 | grep -i superblock [hodge@hodge-fs ~]$ sudo dumpe2fs /dev/md0 | grep -i superblock dumpe2fs 1.41.12 (17-May-2010) Primary superblock at 0, Group descriptors at 1-524 Backup superblock at 32768, Group descriptors at 32769-33292 Backup superblock at 98304, Group descriptors at 98305-98828 Backup superblock at 163840, Group descriptors at 163841-164364 Backup superblock at 229376, Group descriptors at 229377-229900 Backup superblock at 294912, Group descriptors at 294913-295436 Backup superblock at 819200, Group descriptors at 819201-819724 Backup superblock at 884736, Group descriptors at 884737-885260 Backup superblock at 1605632, Group descriptors at 1605633-1606156 Backup superblock at 2654208, Group descriptors at 2654209-2654732 Backup superblock at 4096000, Group descriptors at 4096001-4096524 Backup superblock at 7962624, Group descriptors at 7962625-7963148 Backup superblock at 11239424, Group descriptors at 11239425-11239948 Backup superblock at 20480000, Group descriptors at 20480001-20480524 Backup superblock at 23887872, Group descriptors at 23887873-23888396 Backup superblock at 71663616, Group descriptors at 71663617-71664140 Backup superblock at 78675968, Group descriptors at 78675969-78676492 Backup superblock at 102400000, Group descriptors at 102400001-102400524 Backup superblock at 214990848, Group descriptors at 214990849-214991372 Backup superblock at 512000000, Group descriptors at 512000001-512000524 Backup superblock at 550731776, Group descriptors at 550731777-550732300 Backup superblock at 644972544, Group descriptors at 644972545-644973068 Backup superblock at 1934917632, Group descriptors at 1934917633-1934918156 sudo e2fsck -b 32768 /dev/md0 [hodge@hodge-fs ~]$ sudo e2fsck -b 32768 /dev/md0 e2fsck 1.41.12 (17-May-2010) /dev/md0: recovering journal e2fsck: unable to set superblock flags on /dev/md0 sudo dmesg | tail [hodge@hodge-fs ~]$ sudo dmesg | tail EXT4-fs (md0): ext4_check_descriptors: Checksum for group 0 failed (59837!=29115) EXT4-fs (md0): group descriptors corrupted! EXT4-fs (md0): ext4_check_descriptors: Checksum for group 0 failed (59837!=29115) EXT4-fs (md0): group descriptors corrupted! Please Help!!!

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  • SAS Array with or without expander

    - by tegbains
    Is it better to use a SAS Expander backplane for 12 drives via one SAS connection or is it better to use a SAS backplane with 3 SAS connections? This is in terms of performance, rather than expansion. This array will be setup using ZFS on a OpenSolaris via a LSI SAS controller as an iSCSI target. The two products being considered are the SuperMicro SuperChassis 826A-R1200LPB or the SuperChassis 826E2-R800LPB

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  • Ask the Readers: Are You A Second Screen Multi-tasker?

    - by Jason Fitzpatrick
    Television watchers are no longer keeping their eyes continuously glued to the screen–increasingly smartphone, tablet, and laptop users have merged their mobile device and television time. Are you one of the second screen multi-taskers? Image courtesy of Umani, a TV-companion application for iPad. According to Nielsen user surveys, at least 80% of mobile device owners have used their device while watching television in the past month–27% said they use their mobile device alongside the television multiple times a day. What the survey results are light on, however, is an in depth look at what the users are doing with their second screen. This week we want to hear about whether or not you’re one of the second screen multi-taskers and what you use your mobile device for during your television/movie time. Sound off in the comments and then check back in on Friday for the What You Said roundup. How to Get Pro Features in Windows Home Versions with Third Party Tools HTG Explains: Is ReadyBoost Worth Using? HTG Explains: What The Windows Event Viewer Is and How You Can Use It

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  • How Do You Calculate Processor Speed on Multi-core Processors?

    - by Jason Fitzpatrick
    The advent of economical consumer grade multi-core processors raises the question for many users: how do you effectively calculate the real speed of a multi-core system? Is a 4-core 3Ghz system really 12Ghz? Read on as we investigate. Today’s Question & Answer session comes to us courtesy of SuperUser—a subdivision of Stack Exchange, a community-drive grouping of Q&A web sites. 6 Start Menu Replacements for Windows 8 What Is the Purpose of the “Do Not Cover This Hole” Hole on Hard Drives? How To Log Into The Desktop, Add a Start Menu, and Disable Hot Corners in Windows 8

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  • Is there a difference between multi-tasking and time-sharing?

    - by Dummy Derp
    Just going over my school notes, my teacher identifies multi-tasking OS, and time-sharing OS as two different things. I really don't see a difference between the two. MULTI-TASKING: You load a number of programs in the memory and execute them. You execute another program if the time quantum allocated to the current program expires OR if it goes on to do I/O and leaves the CPU OR if it finishes execution. TIME-SHARING: the same,again. The same applies in case of serial processing and batch processing. Although they are the same, I guess the only difference would be the way in which control information is passed to the CPU. Maybe, and again MAYBE, in serial processing you need to provide the punch cards with all the processes while in batch, the entire batch uses the same set of control information. Like all the print jobs would have the same control information.

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  • Is someone aware of any multi threaded unrar program?

    - by rsz
    I was searching in the past (past few weeks) for a program/software which is multithreaded and it is able to extract rarparts using multi threading. What software's i've already tried? unrar, unrar-nonfree, rar, 7zip It seemed to me that none of them is multi threaded and therefore they are all slow. The solution would be needed in cli format so if not necessary the no gui. Is someone aware of something like this? I asked on other irc's for suggestions and they told me, that the best is to write one myself. I may be agree with them, but i don't have these type of knowledge to achieve this task.

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  • poorman's redandunt domain name server array

    - by John
    Can I configure my domain, example.com's name servers as: ns1.dyndns.com ns2.dyndns.com ns1.opendns.com ns2.opendns.com That is, combining free dns services to create a redundant name server array? Note these name servers from different companies are not aware other companies' name servers also serve our domain. In case one company, say, ns1(2).dyndns.com is down, will people experience interruption when visiting my example.com? If one name server is unreachable, the next name server will be tried, or?

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  • I need a multi-language site with webshop functionality. Which CMS to choose?

    - by ec30
    I need to develop a multi-language site which includes simple webshop functionality. I have extended experience with WordPress. There are numerous shopping cart plugins available for WordPress however none of them is compatible with multi-language plugins such as WMPL. Drupal is an option I looked into (using i18n and Ubercart) and I am not sure this is the solution I am looking for. Another solution I considered is to develop a custom WordPress cart plugin that is compatible with WPML. Anyone familiar with this situation? Any recommendation regarding CMSes that fit my needs? Thanks!

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  • NSDictionary with key => String and Value => c-Style array

    - by Gautam Borad
    I need an NSDictionary which has key in the form of string (@"key1", @"key2") and value in the form of a C-style two-dimentional array (valueArray1,valueArray2) where valueArray1 is defined as : int valueArray1[8][3] = { {25,10,65},{50,30,75},{60,45,80},{75,60,10}, {10,70,80},{90,30,80},{20,15,90},{20,20,15} }; And same for valueArray2. My aim is given an NSString i need to fetch the corresponding two-dimentional array. I guess using an NSArray, instead of c-style array, will work but then i cannot initialize the arrays as done above (i have many such arrays). If, however, that is doable please let me know how. Currently the following is giving a warning "Passing argument 1 of 'dictionaryWithObjectsAndKeys:' from incompatible pointer type" : NSDictionary *myDict = [NSDictionary dictionaryWithObjectsAndKeys:valueArray1,@"key1", valueArray2,@"key2",nil];

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  • How to remove particular element form array

    - by Rahul Mehta
    Hi, I have the following array: Array ( [userid] => 1 [alias] => rahul [firstname] => rahul [lastname] => Khan2 [password] => Ý2jr™``¢(E]_Ø=^ [email] => [email protected] [url] => 4cfe07dbf35d6.jpg [avatar_url] => 4cfe07efd2e1c.jpg [thumb] => 4cfe07ebc8955.jpg [crop_url] => 4cfe07dbf35d6.jpg [crop_position] => [100,100,200,200] [updatedon] => 0000-00-00 00:00:00 [createdon] => 0000-00-00 00:00:00 ) I want to remove the element url ,and crop_url How i can i remove these from array.

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  • Display Image from Byte Array in WPF - Memory Issues

    - by ChrisFletcher
    Hi, I've developed an application to capture and save images to a database, but I'm having an issue with memory usage. On my domain object I have 3 properties: Image - Byte array, contents are a jpg RealImageThumb - The byte array converted to a BitmapImage and shrunk, displayed to the user in a gridview with other thumbnails RealImage - Has no setter, the byte array converted to a bitmap source, this is shown in a tooltip when the user hovers over it. The issue I have is that if a user hovers over each image in turn the memory usage spirals. I realise that as a user hovers over bitmap sources are generated and the memory isn't freed up, I've tried giving RealImage a backing property and assigning this to null after but again the memory isn't freed up (waiting for the garbage colelctor?.

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  • Sorting an array in PHP based on different values

    - by Jimbo
    I have an array whose elements are name, reversed_name, first_initial and second_initial. A typical row is "Aaron Smith", "Smith, Aaron", "a", "s". Each row in the array has a first_initial or second_initial value of "a". I need to display the rows alphabetically but based on the "a" part, so that either the name or reversed_name will be displayed. An example output would be: Aaron Smith Abbot, Paul Adrian Jones Anita Thompson Atherton, Susan I really have no idea how to sort the array this way so any help will be much appreciated!

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  • xpcom array can transfer in different xul files ?

    - by jin
    Now I am developing a firefox extension, can I define a global array in a js with the main xul . and I found when I use it in another js with another xul , it could not worked , so I searched the document of Firefox development. I found a common array can not be transfered between two js files with different xul files. and then I difined a xpcom mutablearray in a js: var eleList = Components.classes["@mozilla.org/array;1"] .createInstance(Components.interfaces.nsIMutableArray); but when I want to use it in another js : it still not work , why? Thank you very much!

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  • Marshaling an array of IntPtrs in C#

    - by mcoolbeth
    From safe, managed code in C#, I would like to call a function in a C API that receives an array of pointers (void**). I have the corresponding managed array of IntPtr objects, but the Marshal methods advertised in the documentation at MSDN do not seem sufficient to provide and IntPtr to an unmanaged block of memory with the correct content. I had hoped to obtain an IntPtr with 'Marshal.AllocHGlobal' and then assign the correct content using 'Marshal.Copy', but it seems the function has not been overloaded for an array of IntPtr. Any thoughts on the best way to do this? Thanks in advance.

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  • C-array to NSData and back

    - by Thor Frølich
    I'm attempting to save a c-style array of Vertex3D structs to an NSData object and get them back when reloading the app: NSData *vert = [NSData dataWithBytes:&vertices length:(sizeof(Vertex3D) * NUM_OF_VERTICES)]; This data is then saved and attempted to be read back into my c-array thusly: vertices = malloc(sizeof(Vertex3D) * NUM_OF_VERTICES); [vert getBytes:&vertices length:(sizeof(Vertex3D) * NUM_OF_VERTICES)]; The above results in “EXC_BAD_ACCESS” followed by: malloc: * error for object 0x48423c0: pointer being freed was not allocated I'm very new to programming so there's probably some fundamental memory management principle I'm unaware of. I have verified that the loaded NSData is identical to the saved one, but it's clear that the transition from c-array to NSData (and back) is not as I intended.

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  • Convert CString array to System::String

    - by Anu
    Hi, I want to convert CString array to managed code ot send it to C#. For normal CString i did like this, CString menu = "MENU"; String ^ msg = gcnew String(menu); Globals1::gwtoolbar->Add(msg); But now i want to send array of string.i dont know how to do for CString array. When i gave like this it shows error CString menu[10]; String[] ^ msg = gcnew String(menu); How can i convert it?

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