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• Ruby equivalent to "grep -C 5" to get context of lines around the match?

  - by wonderfulthunk

  I've searched for this a bit but I must be using the wrong terms - does ruby have a way to grep for a string/regex and also return the surrounding 5 lines (above and below)? I know I could just call "grep -C 5 ..."or even write my own method, but it seems like something ruby would have and I'm just not using the right search terms.

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• converting an interface to a type in MVC

  - by danielovich

  Hi. I have a small isuse regarding an interface. Consider this code: [HttpPost()] public void Update(IAuctionItem item) { RedirectToAction("List"); } Whenever I call this I get an exception saying I can't create an instance of type which i totally correct. But is there a way of telling what the interface should map to without actually using the concrete type ?

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• Trigger function inside a usercontrol from a page

  - by diver-d

  Hi there, I have created a usercontrol to capture education details, it contains 5 textboxes and an functionto insert that values into my db. I have added the usercontrol 5 times to a page. I have a button on my aspx page which I want to be able to click and call the function to insert the values. Can anyone suggest how I can do this?

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• How can I move deleting photos to the background with delayed_job and paperclip

  - by Tam

  I let my users create photo albums with many photos. Relationship as follows: has_many :album_photos, :dependent => :destroy i upload photos to S3 When the user delete album I want to delete all photos as the relationship shows but it takes time if the user has many photos. Can I automatically set photo deletion to happen in the background (delayed_job) without having to manually call 'send_later' on every photo?

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• Calling a non-exported function in a DLL

  - by Nilbert

  I have a program which loads DLLs and I need to call one of the non-exported functions it contains. Is there any way I can do this, via searching in a debugger or otherwise? Before anyone asks, yes I have the prototypes and stuff for the functions.

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• jQuery: What to do with the list that sortable('serialize') returns?

  - by bartclaeys

  With jQuery I'm retrieving positions of a sortable list using 'serialize', like this: var order = $('ul').sortable('serialize'); The variable 'order' then receives the following: id[]=2&id[]=3&id[]=1&id[]=4&id[]=5 Now how can I use this data in an ajax call? This is how I plan to do it, but it's ugly and I can't change the parameter name 'id': $.post('ajax.php?'+order,{action:'updateOrder'}); Maybe I need to unserialize, then implode the variable 'order' and assign it to just one parameter?

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• Calling member function declared in another dll

  - by bharat

  I have created CMyClass,in which defined one method CallMe().when I build this project MyProject.dll is generated. Now in some another project, I want to call CallMe of CMyClass . can anybody tell me how to do it ? Thanks in advance....

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• how to handle click event in win32 API?

  - by Rakesh

  I have created a simple win 32 application..in which it has a textbox and a button in a dialog window..first when I created this..it didnt display the dialog window and then what I did is added the code below to handle the close(WM_CLOSE) of the dialog window...but I want to know, how to handle the button click event.. LRESULT WINAPI myProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) { if(message == WM_CLOSE ) { PostQuitMessage(0); } return 0; } to call the above in my main pgm I used SetWindowLong(hwnd,DWL_DLGPROC, (long)myProc)

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• What's the __repr__ equivalence in ruby?

  - by prosseek

  The repr function is fancy as it is called when print OBJECT is used automatically? Is there a ruby equivalence for it? I thought it was to_s, but, I had p OBJECT doesn't seem to call the to_s method.

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• How can I pass a C++ member function to a C API as a parameter

  - by michael

  Hi, In my C++ program, I need to call this c API: GConn* gnet_conn_new (const gchar *hostname, gint port, GConnFunc func); where GConnFunc is defined as: void (*GConnFunc) (GConn *conn); My question is if I have a C++ class and have a member function like Class A { public: A(); void my_func (GConn* conn); } In my A::A() Constructor, how can I pass this-myfunc to gnet_conn_new as the GConnFunc parameter? Thank you.

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• Bubbling up events . .

  - by oo

  I have multiple layers in an application and i find myself having to bubble up events to the GUI layer for doing status bar changes, etc . . I find myself having to write repeated coded where each layer simply subscribes to events from the lower layer and then in the call back simply raise an event up the chain. Is there a more efficient way of doing this?

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• Joomla 2.5 - Modify registration form and logic

  - by ice13ill

  Hello I'm new to Joomla and I want to change the way an account is created (in Joomla 2.5): Change the registation form (remove one or two fields) Change the registration logic: I want to add more stuff in the sent email (and a pdf attachment) and also i want to call some other functions (or make extra requests), analyse the result and then return the response to the client. What ways are there?

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• Async polling useable for GUI thread

  - by Tomas

  Hi, I have read that I can use asynchronous call with polling especially when the caller thread serves the GUI. I cannot see how because: while(AsyncResult_.IsCompleted==false) //this stops the GUI thread { } So how it come it should be good for this purpose? I needed to update my GUI status bar everytime deamon thread did some progress..

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• How to get properties from Cassandra with get_slice in Erlang?

  - by Zubair

  I am using Erlang to interface with Cassandra and I cannot get the get_slice command to return a list of all the columns of a row. I use: X = thrift_client:call( C, 'get_slice', [ "Keyspace1", K, #columnParent{column_family="KeyValue"}, #slicePredicate{}, 1 ] ), : but I get back : invalidRequestException,<<"predicate column_names and slice_range may not both be null">> : However, using the cassandra-cli interface this works fine. Any ideas?

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• Setting system date and time from the application

  - by Sundar

  I have a application that is developed using .Net Compact frame work 3.5, i need to synchronize the device date and time with the central server on every web service call. Thanks.

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• What are the suggested alternatives for Class<T>.isAssignableFrom(Class<?> cls)?

  - by Wing C. Chen

  Currently I am doing the profiling to a piece of code. During the profiling, I discovered that this very method call, Class<T>.isAssignableFrom(Class<?> cls) takes up to quite amount of the entire time. Because this is a method from reflection, it takes a lot of time compared to normal keywords or method calls. I am wondering if there are some good alternatives for this method calls?

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• 'Invalid conversion from some_type** to const some_type**'

  - by petersohn

  I've got a function that requires const some_type** as an argument (some_type is a struct, and the function needs a pointer to an array of this type). I declared a local variable of type some_type*, and initialized it. Then I call the function as f(&some_array), and the compiler (gcc) says: error: invalid conversion from ‘some_type**’ to ‘const some_type**’ What's the problem here? Why can't I convert a variable to const?

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• Can I Force A ASP.Net Website to Show Time in A Specific Time Zone?

  - by KevDog

  I have a client request that all times be displayed in Pacific Time Zone, regardless of client settings. I'd like to avoid a scenario where I have to call a function for every time display and instead have a single point where I can make the switch. I'm thinking a custom culture might do the trick, but I wanted to ask before I set off down a potentially blind alley (or miss something trivially easy).

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• Recursive insert-method for a linked list

  - by user3726477

  I'm learning C# and I've made a recursive insert-method for a linked list: public static int recursiveInsert(ref int value, ref MyLinkedList list) { if (list == null) return new MyLinkedList(value, null); else { list.next = recursiveInsert(ref int value, ref list.next); return list; } } How would you modify this method to make the recursive call look like this: recursiveInsert(value, ref list.next) instead of: list.next = recursiveInsert(ref int value, ref list.next);

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• why does my javascript regex.test() give alternating results

  - by Dennis George

  var r = /\d/g; var a = r.test("1"); // will be true var b = r.test("1"); // will be false console.log(a == b); // will be false Please explain to me why the result of r.test("1") alternates with each call? I was able to work around the issue I was having by removing the g modifier. However I would still like to understand why this happens.

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• How would I create this background effect?

  - by William

  What would you call the effect applied to the backgrounds in the Giygas fight of Earthbound, and the battle backgrounds in Mother 3? This is what I'm talking about. http://www.youtube.com/watch?v=tcaErqaoWek http://www.youtube.com/watch?v=ubVnmeTRqhg Now anyone know how I could go about this without using animated images, or using openGL?

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• Django | How to pass form values to an redirected page

  - by MMRUser

  Here's my function: def check_form(request): if request.method == 'POST': form = UsersForm(request.POST) if form.is_valid(): cd = form.cleaned_data try: newUser = form.save() return HttpResponseRedirect('/testproject/summery/) except Exception, ex: # sys.stderr.write('Value error: %s\n' % str(ex) return HttpResponse("Error %s" % str(ex)) else: return render_to_response('index.html', {'form': form}, context_instance=RequestContext(request)) else: form = CiviguardUsersForm() return render_to_response('index.html',context_instance=RequestContext(request)) I want to pass each and every field in to a page call summery and display all the fields when user submits the form, so then users can view it before confirming the registration. Thanks..

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• Is there a way to specify the local port to used in tcpClient?

  - by alex

  Hi: I am currently using this function call to create my tcpClient: clientSocket = new TcpClient("localhost", clientPort); But the clientPort is the server's port. Is there a way for me to specify the client port using tcpClient? Thanks

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• Force Tab Activity creation?

  - by Daniel

  I have a TabHost and several tabs added to it. Problem: The activities on these tabs are not created until the tab is pressed. My tabhost is broadcasting intents but my broadcast receivers are not registered until onCreate in my tab activities is called. Is there any way to force activity creation? Maybe my tabhost can call setCurrentTab and switch back to main tab(0), but is that really the best option available?

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• Get a char from a CString

  - by Sunscreen

  I have created a function that has as input a char szMyChar; (using it in a switch statement). Now I have a CString havong just a char, lets say CString strString = "A"; An option to call the function could be: if (strString == "A") CallMyFunc('A'); though it is clumsy. I tried atoi (returns 0) and casting though neither works. Any ideas? Thanks, Sun

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