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  • What's the consequence when Core Data detects an optimistic locking failure when trying to save?

    - by dontWatchMyProfile
    I get it: When a managed object context saves, the snapshots of all edited objects are compared against the values in the persistent store to see if the PS has changed since the snapshot was made. If it did change, then there's a conflict and optimistic locking failed, according to Apple. But now, what's the consequence of this? What happens next? What are my options in this case?

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  • Difference between methods with and without generics

    - by isakavis
    Can someone help me understand advantages and disadvantages (if any) between the following methods which do the same function of storing away the entity to azure (in my case)? public bool Save<T>(string tableName, T entity) where T : TableEntityBase, new() { throw new NotImplementedException(); } vs public bool Save(string tableName, TableEntityBase entity) { throw new NotImplementedException(); }

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  • Will the error be displayed?

    - by user281180
    I have an ajax post and in the controller I return nothing. In case there is a failure will the error message displayed with the follwoing code? [AcceptVerbs(HttpVerbs.Post)] public void Edit(Model model) { model.Save(); } $.ajax({ type: "POST", url: '<%=Url.Action("Edit","test") %>', data: JSON.stringify(data), contentType: "application/json; charset=utf-8", dataType: "html", success: function() { }, error: function(request, status, error) { alert("Error: " & request.responseText); } });

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  • What's the best way to display a blown-up image using minimal JQuery?

    - by TkTech
    The Goal: On mouseover (or :hover), enlarge the preview image by about 400% and display it in the center of the page Remove the preview when the mouse leaves The Problem: Solutions like FancyBox are too bloated in FancyBox's case it ignores width and height for image elements, which makes it useless Most of these "lightboxes" steal focus when they're called Really, I'm just looking for a simple, efficient solution. Oops - StackOverflow won't let me post images yet, mockup - http://img685.imageshack.us/img685/7649/idae.png

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  • Local development using HTML5 storage

    - by jasongonzales
    I am experimenting with HTML5 local storage functionality, but was frustrated to learn that the browser won't allow local storage when the file is local. My guess is that the browser (Chrome in my case, FF too) wants to see a domain rather than a file location. Has anyone here discovered a workaround for developing locally? Perhaps setting up a local domain? That sounds like too much trouble. There should just be a developer option in the browser, grrrrrr.

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  • how to read the contents of a file In Erlang ?

    - by Zubair
    I know you can do something like this: readlines(FileName) -> {ok, Device} = file:open(FileName, [read]), get_all_lines(Device, []). get_all_lines(Device, Accum) -> case io:get_line(Device, "") of eof -> file:close(Device), Accum; Line -> get_all_lines(Device, Accum ++ [Line]) end. : Is there a one liner BIF that can do this too?

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  • how do i use @var on a function variable?

    - by fayer
    i've got a variable $user that is of data type User (a class). i've got it in a class method so i can't just type: /** * @var User */ $user = Factory::getInstance('User'); because that will work only with class properties, not method variables like in this case. how could i tell netbeans that that variable is of data type User in a method? Thanks!

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  • closure not working

    - by dorelal
    var Dog = function() { var _instance = 'hello world'; return function() { console.log(this._instance); } } (); //note that it is self invoking function var l = new Dog(); //#> undefined In the above case I was expecting output of 'hello world'. Why this._instance is not accessing the the varible which should be accessible by virtue of closure. I tested this in FF and am getting undefined.

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  • Linux: Can Recvmsg be used to receive the IP_TOS of every incoming packet

    - by Mayutan
    Can one use recvmsg() to obtain the IP_TOS field of every incoming packet or does it just show the IP_TOS value that is set for the particular socket. If not, does anyone know of a solution to obtain the IP_TOS values of every incoming packets. I am using a UDP application and therefore do not get to view the IP_TOS field at the application layer as is the case with TCP. Thanks.

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  • \sbox from inside an environment

    - by Miek Gieben
    I'm trying to save some text inside an environment for later use. The smallest test case I could come up with is this. The saved text in the sbox isn't available after the environment is closed. How can I work around that? Thanks. \documentclass{article} \begin{document} \newsavebox{\somebox} \begin{itemize} \item hello1 \item hello1 \sbox{\somebox}{Some text} \end{itemize} This should show something, but does not: "\usebox{\somebox}" \end{document}

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  • Get home directory in Linux, C++

    - by Alex Farber
    I need a way to get user home directory in C++ program running on Linux. If the same code works on Unix, it would be nice. I don't want to use HOME environment value. AFAIK, root home directory is /root. Is it OK to create some files/folders in this directory, in the case my program is running by root user?

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  • when to use const char *

    - by djones2010
    If i have a function api that expects a 14 digit input and returns a 6 digit output. I basically define the input as a const char *. would that be the correct and safe thing to do? also why would I not want to just do char * which I could but it seems more prudent to use const char * in that case especially since its an api that i am providing. so for different input values I generate 6 digit codes.

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  • please help me to solve problem

    - by davit-datuashvili
    hi everybody fisrt of all this is not homework and now question is like this suppose i have array int a[]=new int[]{0xBCDA,0xABFE,0xBCAD,0xEFCA,0xFFCA} i know that there is always some hexadecimal number which occurs in all number or in this case A is repeat in array everywhere so my aim is print only repeat number and other numbers should be zero so my new array should be like this 0x000A, 0xA000,0x00A0 0x000A,0x000A any idea please help me? p.s please nobody say that this is homework

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  • How to execute query with empty fields?

    - by Kliver Max
    I have a SQL Query: SELECT documents.*, t_rights.rights, documents_list.docs FROM documents INNER JOIN t_rights on t_rights.num=documents.type_right INNER JOIN documents_list on documents_list.num=documents.document1 WHERE code_document=1 or code_document=1 In case if i have fields documents.document1 and documents.document1 with some value all works fine. But if this field empty i get empty query result. Its possible make query like this with empty fields?

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  • Scrollbar moves back after WM_VSCROLL

    - by user146780
    I have a window with its own H and V scrolling. I'm handling the event like this: case WM_VSCROLL: SetScrollPos(hWnd, SB_VERT, (int)HIWORD(wParam), TRUE); break; all I want is for the position of the scroll bar to stay once I release my mouse but what it's doing is just going back to the top after. What am I doing wrong? Thanks

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  • remove contact's photo

    - by Varand Tin
    Hey guys, in order to remove contact's photo, which way is correct? 1) to update and set Photo.PHOTO to ""/"NULL" , or 2) to update and set Photo.MIMETYPE to ""/"NULL" or 3) to update and set Data.MIMETYPE to ""/"NULL" ? I wanted to mention also that I insert photos from my app by the following way: cr.insert(ContactsContract.Data.CONTENT_URI, photoValues); Please also tell me "" is better or null? (in updating case) Thanks a lot.

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