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  • Why do I need the isset() function in php?

    - by Chris
    I am trying to understand the difference between this: if (isset($_POST['Submit'])) { //do something } and if ($_POST['Submit']) { //do something } It seems to me that if the $_POST['Submit'] variable is true, then it is set. Why would I need the isset() function in this case?

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  • object reference set in java

    - by landon9720
    I need to create a Set of objects. The concern is I do not want to base the hashing or the equality on the objects' hashCode and equals implementation. Instead, I want the hash code and equality to be based only on each object's reference identity (i.e.: the value of the reference pointer). I'm not sure how to do this in Java. The reasoning behind this is my objects do not reliably implement equals or hashCode, and in this case reference identity is good enough.

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  • How do you get the width of an element without a defined width?

    - by Moak
    How would you find out the width of a element that is wrapped by 20 odd other elements, but the only fixed width I know is the main wrapper's which is 800px. All child elements are generally blocks, floating or not, with different paddings and margins. I don't really need the answer to a specific case, I'm just wondering if there are tools or tricks to quickly calculate such things. Thanks

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  • Remove a character from a given position on Oracle

    - by alex
    Is there anyway to remove a character from a given position? Let's say my word is: PANCAKES And I want to remove the 2nd letter (in this case, 'A'), so i want PNCAKES as my return. Translate doesnt work for this. Replace doesnt work for this. Regex is damn complicated... Ideas?

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  • IE8 disappearing image bug

    - by Joe Fletcher
    In IE8 (& maybe others), when I leave my page to go to another tab in IE and then come back to my page's tab, each time the cursor runs over an image it disappears until I refresh the page. I've heard of disappearing image bugs, but I couldn't find anything on this particular case, especially given this isn't a weird pre-IE8 bug. I am using a lightbox, so possibly something to do with javascript? http://dev.bwmsnow.co.nz/snowboarding

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  • WinSock best accept() practices

    - by Meta
    Imagine you have a server which can handle only one client at a time. The server uses WSAAsyncSelect to be notified of new connections. In this case, what is the best way of handling FD_ACCEPT messages: A Accept the connection attempt right away but queue the client until its turn? B Do not accept the next connection attempt until we are done serving the currently connected client? What do you guys think is the most efficient?

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  • Why thread specific data is required in pthread ?

    - by user504542
    Hi As i know, all the threads share memory location. For example a global variable changes in one thread will reflect in another thread. Since each thread has its own stack, the local variables that are created inside the thread is unique. In this case, why do we need to go for thread specific data mechanism?. Can't it be achieved by auto storage varibles inside the thread function ? Kindly clarify!!!. BR Rj

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  • How to set a dynamic width on a floating div?

    - by user330144
    I have a div container with 3 div elements inside (A, B, and C). I'll know the width of the container and the width of A and B) the problem is that in some cases B won't be there in which case I need C to expand to fill the rest of the container. How would I do this with straight css or am I going to need to use javascript to calculate the width? Thanks.

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  • What makes C faster than Python?

    - by Chris
    I know this is probably a very obvious answer and that I'm exposing myself to less-than-helpful snarky comments, but I don't know the answer so here goes. If Python compiles to bytecode at runtime, is it just that initial compiling step that takes longer? If that's the case wouldn't that just be a small upfront cost in the code (ie if the code is running over a long period of time, do the differences between C and python diminish?)

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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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  • 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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  • 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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  • .NET: How to place my window near the notification area (systray)?

    - by Vilx-
    I'd like to display a little popup window next to the notification area. It's similar to what Outlook/Skype/Live! Messenger/etc does when it displays the notification about a new message. In my case it will have some input controls (textbox, datetimepicker, buttons...) so a simple bubble won't do. The trick is doing this correctly when the user has multiple monitors and/or the taskbar is not located at the bottom of the screen.

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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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  • 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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