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  • Does the Fetch Request do the recommended batch faulting?

    - by dontWatchMyProfile
    I'm curious. Apple says in the docs: Core Data automatically fires faults when necessary (when a persistent property of a fault is accessed). However, firing faults individually can be inefficient, and there are better strategies for getting data from the persistent store (see “Batch Faulting and Pre-fetching with the SQLite Store”). NSFetchRequest has this feature: [fetchRequest setFetchBatchSize:20]; Is this essentially performing such a batch faulting like recommended? Just to make this clear for others, faulting does not mean "turning into a fault" but it means "materializing it", just like "making a Scooby-Doo out of it". Pretty ugly wording error, in my opinion, but it's at least consistent in the docs ;)

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  • PHP wamp server error

    - by user38453
    I get this error when i click phpmyadmin.I m using vistaa.I uninstall ed skype.I deleted IIS and it is in my recycle bin, When,i click localhost,i get iis page.How do,i make this apache server to work.Below,is the error that comes Server Error in Application "DEFAULT WEB SITE" Internet Information Services 7.0 Error Summary HTTP Error 404.0 - Not Found The resource you are looking for has been removed, had its name changed, or is temporarily unavailable. Detailed Error Information Module IIS Web Core Notification MapRequestHandler Handler StaticFile Error Code 0x80070002 Requested URL http://localhost:80/phpmyadmin/ Physical Path C:\inetpub\wwwroot\phpmyadmin\ Logon Method Anonymous Logon User Anonymous

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  • What is the maximum length in seconds to store a value in memcache

    - by Emilien
    The Google App Engine memcache documentation states that the time parameter of memcache.set() is an "Optional expiration time, either relative number of seconds from current time (up to 1 month), or an absolute Unix epoch time." So I tried to set a value for 30 days, which according to Google is 2 592 000 seconds. However, I highly suspect that this value is too high, because the value was set (memcache.set() returned the value True), but a memcache.get() just after always returned None. Reducing this value to 1 728 000 seconds just worked fine/as expected. I guess that once passed the highest value, the time parameter gets interpreted as an absolute Unix epoch time. That would mean that 2 592 000 seconds got interpreted as "Sat, 31 Jan 1970 00:00:00 GMT", which is obviously a date in the past... So what is the highest value you can enter that will get interpreted as a number of seconds in the future?

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  • In C#, how do you send a refresh/repaint message to a WPF grid or canvas?

    - by xarzu
    How do you send a refresh message to a WPF grid or canvas? In other words, I have noticed while in debug mode, I can write code that sends a line to the display and then, if that line is not right, I can adjust it -- but the previous line is still there. Now, the code I am writing sends information to the display based on what the user clicks. So this must mean that the display is not refreshed each time a new set of lines and boxes and text goes to the grid or canvas in WPF. Using C# code, how do you send a refresh/repaint message to a WPF grid or canvas?

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  • Updating the $PATH for running an command through SSH with LDAP user account

    - by Guillaume Bodi
    Hi all, I am setting up a Mac OSX 1.6 server to host Git repositories. As such we need to push commits to the server through SSH. The server has only an admin account and uses a user list from a LDAP server. Now, since it is accessing the server through a non interactive shell, git operations are not able to complete since git executables are not in the default path. As the users are network users, they do not have a local home folder. So I cannot use a ~/.bashrc and the like solution. I browsed over several articles here and there but could not get it working in a nice and clean setup. Here are the infos on the methods I gathered so far: I could update the default PATH environment to include the git executables folder. However, I could not manage to do it successfully. Updating /etc/paths didn't change anything and since it's not an interactive shell, /etc/profile and /etc/bashrc are ignored. From the ssh manpage, I read that a BASH_ENV variable can be set to get an optional script to be executed. However I cannot figure how to set it system wide on the server. If it needs to be set up on the client machine, this is not an acceptable solution. If someone has some info on how it is supposed to be done, please, by all means! I can fix this problem by creating a .bashrc with PATH correction in the system root (since all network users would start here as they do not have home). But it just feels wrong. Additionally, if we do create a home folder for an user, then the git command would fail again. I can install a third party application to set up hooks on the login and then run a script creating a home directory with the necessary path corrections. This smells like a backyard tinkering and duct tape solution. I can install a small script on the server and ForceCommand the sshd to this script on login. This script will then look for a command to execute ($SSH_ORIGINAL_COMMAND) and trigger a login shell to run this command, or just trigger a regular login shell for an interactive session. The full details of this method can be found here: http://marc.info/?l=git&m=121378876831164 The last one is the best method I found so far. Any suggestions on how to deal with this properly?

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  • How to Serialize a WPF Drawing?

    - by Néstor Sánchez A.
    Hi, maybe I'm missing something. I believed that WPF vector-based Drawings (like DrawingGroup, DrawingGeometry, etc.) were ready to be serialized. But they are not. So, should I navigate all these drawing childrens, and store they points, lines, brushes (that also are not serializable) and so on, and then made my custom serialization? Is really that difficult or I'm missing something pretty obvious? I mean, even serializing Bitmap images is easy. I thinked serializing vector-based drawings were easier (no quality loss, just descriptive info, no massive data). Thanks for your practical answers, alternate-way suggestions and comments!

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  • Why & When should I use SPARSE COLUMN? (SQL SERVER 2008)

    - by priyanka.sarkar
    After going thru some tutorials on SQL SERVER 2008's new feature SPARSE COLUMN, I have found that it doesn't take any space if the column value is 0 or null but when there is a value, it takes 4 times the space a regular(non sparse) column holds. If my understanding is correct, then why I will go for that at the time of database design? And if I use that, then at what situation so I be? Also out of curiosity, how come no space get's reserve when a column is defined as sparse column(I mean to say, what is the internal implementation for that) Thanks in advance

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  • Explaining persistent data structures in simple terms

    - by Jason Baker
    I'm working on a library for Python that implements some persistent data structures (mainly as a learning exercise). However, I'm beginning to learn that explaining persistent data structures to people unfamiliar with them can be difficult. Can someone help me think of an easy (or at least the least complicated) way to describe persistent data structures to them? I've had a couple of people tell me that the documentation that I have is somewhat confusing. (And before anyone asks, no I don't mean persistent data structures as in persisted to the file system. Google persistent data structures if you're unclear on this.)

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  • JPA query for getting the whole tree

    - by Javi
    Hello, I have a class which models all categories and they can be ordered hierarchically. @Entity @Table(name="categories") public class Category { @Id @GeneratedValue(strategy=GenerationType.SEQUENCE, generator="sequence") @SequenceGenerator(name="sequence", sequenceName="categories_pk_seq", allocationSize=1) @Column(name="id") private Long id; @Column private String name; @OneToOne @JoinColumn(name="idfather") private Category father; } I need to get all categories ordered hierarchically (I mean every father followed by its children and fathers ordered alphabetically on each level) as they could be made for example with PRIOR in oracle. Is it possible to do this with a JPA Query (not a SQL one)? Thanks.

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  • Is there any simple way to test two PNGs for equality?

    - by Mason Wheeler
    I've got a bunch of PNG images, and I'm looking for a way to identify duplicates. By duplicates I mean, specifically, two PNG files whose uncompressed image data are identical, not necessarily whose files are identical. This means I can't do something simple like compare CRC hash values. I figure this can actually be done reliably since PNGs use lossless compression, but I'm worried about speed. I know I can winnow things down a little by testing for equal dimensions first, but when it comes time to actually compare the images against each other, is there any way to do it reasonably efficiently? (ie. faster than the "double-for-loop checking pixel values against each other" brute-force method?)

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  • Is there a config option in PHP to prevent undefined constants from being interpreted as strings?

    - by mrbinky3000
    This is from the php manual: http://us.php.net/manual/en/language.constants.syntax.php If you use an undefined constant, PHP assumes that you mean the name of the constant itself, just as if you called it as a string (CONSTANT vs "CONSTANT"). An error of level E_NOTICE will be issued when this happens. I really don't like this behavior. If I have failed to define a required constant, I would rather the script fail so that I am forced define it. Is there any way to force PHP to crash the script if it tries to use an undefined constant? For example. Both of these scripts do the same thing. <?php define('DEBUG',1); if (DEBUG) echo('Yo!'); ?> and <?php if(DEBUG) echo('Yo!'); ?> I would rather the second script DIE and declare that it tried to use an undefined constant DEBUG.

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  • How can I change the handwriting input language in Windows 7?

    - by askvictor
    I'm in a school where all students have tablet PCs, where they use the handwriting (text recognition) function quite a bit. Recently one of the language teachers has asked if they can enter French accents using this method - it seems that one definitely can using windows 7 ultimate, but we're using Pro. I understand that if one changes the entire input language, then this should work, but it doesn't seem to. Any ideas?

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  • Why javascript IF only works one time?

    - by Emily
    I have javascript code which copy the value of input file and past it in the text box in real time. <script> function copyit(){ var thephoto=document.getElementById('thephoto').value; var fileonchange=document.getElementById('fileonchange').value; if(!thephoto==fileonchange){ document.getElementById('fileonchange').value=thephoto; } } window.setInterval("copyit()", 500); </script> Choose File : <input type="file" id="thephoto"><br> Here Is the file name : <input type="text" id="fileonchange"> Sadly this only works one time and then stops pasting the value when changing the file again. ( i mean you should reload the page to works again) Is IF has a cache or something? you can try the code by yourself to see. Thank you all

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  • How to generate semi transparent shapes in php using gdlib

    - by fabbrillo
    Hi, this is the script i made // Create image $img = imagecreatetruecolor($w, $h); // Transparent image $white = imagecolorallocate($img,255,255,255); imagefilledrectangle($img,0,0,$w,$h,$white); imagecolortransparent($img, $white); //imagealphablending( $img, true ); //imagesavealpha( $img, true ); // Shape color $bgColor = imagecolorallocatealpha($img, 100, 250, 250, 70); imagefilledrectangle($img, 15, 20, 50, 100, $bgColor); imagefilledrectangle($img, 10, 25, 60, 100, $bgColor); imagepng($img, 'file.png'); the problem is the rectangles are transparent among them but not with the background i mean, i need to create a transparent image with a semi transparent shape inside any suggestions? thanks for your help

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  • Sample the deltas between values using boost::accumulators

    - by Checkers
    I have a data set with N integers (say, 13, 16, 17, 20) where each next sample is incremented by some value (3, 1, 3 in this case) and I want to use boost::accumulators::accumulator_set to find various statistics of the second sequence. I want to be able to do something like this: accumulator_set< double, features< tag::mean > > acc; ... acc(13); acc(16); acc(17); acc(20); ...BUT sampling the differences instead of the actual values. How can I do that with accumulator_set without keeping track of the last value manually?

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  • Looking for a free tool to visualize object relationships for C#

    - by vfilby
    Here is my ideal solution: a free tool that reads a .csporj or .sln and generates a pretty picture that shows all the objects and how they are related. By relationships, I don't mean inheritance but rather dependency. For example, if we have a Car object and Car has a member variable Wheel, I would like that Car depends on Wheel to be visualized in the graph. I know visual studio can do inheritance graphs, but that is only half of what I am looking for. Is what I am looking for possible? Are there any tools that do something similar? Related question for java: http://stackoverflow.com/questions/1824261/are-there-any-tools-to-visualize-the-objects-being-used-in-a-program

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  • django file upload in 2 steps

    - by alexarsh
    Hi, I want to upload a file in 2 steps. First I want to upload it and show the errors and on the second step I want actually to save the file data in the database. So I made a simple form and my problem is how to pass the same file to the form on the second step? I mean how to insert request.FILES data in the same form again. Or maybe there is a better way? Thanks, Arshavski Alexander.

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  • DNS Lookup in ASP / ASP.Net

    - by Dave Forgac
    I have a Windows server that is intermittently losing the ability to lookup DNS information. I'm trying to get to the root cause of the problem but in the mean time I'd like to be able to monitor whether the server can perform lookups. Basically, it should attempt to lookup some common hostnames and the display 'Success' if the lookups are successful. I see lots of examples of doing this with third party components in ASP but I would prefer to be able to do this with a single ASP / ASP.Net script that would be portable and not require anything additional be installed.

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  • Inheriting from the web client class

    - by robUK
    Hello, C# 2008 I am not sure how much work there is to inheriting from the web client class. Currently I am using it in my project. And I can't change to anything else. The customer would like to have a timeout after a certain period of time. The web client doesn't have this. So rather than re-invent the wheel, I am thinking of inheriting from the web client and adding this property. Do you think this is a suitable solution? Could it mean more work just to add this. What is the easiest way to go about this? Many thanks,

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  • Doubts in System call mechanism in linux

    - by bala1486
    We transit from ring3 to ring0 using 'int' or the new 'syscall/sysenter' instruction. Does that mean that the page tables and other stuffs that needs to be modified for the kernel is automatically done by the 'int' instruction or the interrupt handler for the 'int 0x80' will do the required stuff and jump to the respective system call. Also when returning from a system call, we again need to go to user space. For this we need to know the instruction address in the user space to continue the user application. Where is that address stored. Does the 'ret' instruction automatically changes the ring from ring3 to ring0 or where/how this ring changing mechanism takes place? Then, i read that changing from ring3 to ring0 is not as costly as changing from ring0 to ring3. Why is this so?? Thanks, Bala

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  • Efficient heaps in purely functional languages

    - by Kim
    As an exercise in Haskell, I'm trying to implement heapsort. The heap is usually implemented as an array in imperative languages, but this would be hugely inefficient in purely functional languages. So I've looked at binary heaps, but everything I found so far describes them from an imperative viewpoint and the algorithms presented are hard to translate to a functional setting. How to efficiently implement a heap in a purely functional language such as Haskell? Edit: By efficient I mean it should still be in O(n*log n), but it doesn't have to beat a C program. Also, I'd like to use purely functional programming. What else would be the point of doing it in Haskell?

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  • Best disassembler tool for the .NET reflector?

    - by Joan Venge
    What's the best disassembler tool for the .NET reflector? By best I mean, saving a .NET assembly in a disassembled state in most readable, most likely to compile with fewer changes. The current one I use doesn't show simplified enumeration but shows the full IEnumerable implementations with MoveNext, etc with member names like: this.<4_state CS$<9_CachedAnonymousMethodDelegate3 Btw I am not trying to steal code, just trying out certain things on an already existing assembly instead of writing a similar thing from scratch. In the end, it's what I will learn from this that will stay, not the modified assembly.

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  • Java - JTable multiple instances

    - by Brian
    I have a JTable that gets data added to it from another JTable. Now I want to switch between JTables according to the day selected in a JComboBox. For example, if I choose Monday I add programs added to it then I select Tuesday from the JComboBox and a fresh JTable appears. If I go to Monday again the programs should still be there (until the program is closed). How do I create multiple JTables (the JTable remains the same) for the days and let the info remain there until program closure? Here is an example to show you what I mean:

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  • I have a problem sometimes in my vb.net webmail application?

    - by ahmed
    I have a weird problem in my vb.net web application sometimes. webmail webform with html editor, sometimes very rare users type for example more than 200 or 400 characters and send the message to other user. But the reciever only recieves 5 or 7 characters. 2 or 3 words of the message. I don know what is going on. I checked the code, no bugs everything is working fine.All the users are on Microsoft XPsp2 platform. Any help will be appreciated. Is this sufficient , or shall I provide any more input regarding the problem...?? OK I got it... the problem is when I type characters in HtmlEditor it keeps on continuing, i mean it should go to the end and automatically comes to the second line....but it is going on and on.how can I stop this.

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  • How to setup terminal service gateway in my RDP client

    - by Stan
    I am using "RD Tabs" to bypass the terminal service gateway to RDP to the remote host. Usually I use browser and go to https://webvpn.company.com:777 with my account. Now in RD Tabs advanced settings, it's asking server name and authentication method. How should I fill this information? I tried below: server: webvpn.company.com:777 authentication: Attempt TLS But it's not working, what could be wrong? Thanks.

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