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• Java combine parents of two large inheritance chains

  - by Soylent Green

  I have two parent classes in a huge project, let's say ClassA and ClassB. Each class has many subclasses, which in turn have many subclasses, which in turn have many subclasses, etc. My task is to "marry" these two "families" so that both inherit from a SINGLE parent. I need to essentially make ClassA and ClassB one class (parent) to both of their combined subclasses (children). ClassA and ClassB both currently implement Serializable. I am currently trying to make both inheritance chains inherit from ClassA, and then copy all functions and data members from ClassB into ClassA. This is tedious, and I think a terrible solution. What would be the CORRECT way to solve this problem?

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• How to deal with accelerators for disabled controls?

  - by sharptooth

  I have a dialog created from a template. It has controls listed in the template in the following order: some irrelevant controls a label with an accelerator (let's pretend it's Alt-A) an edit box OK and Cancel buttons Normally when I hit Alt-A the keybord focus is transferred to the edit box - just as needed. However I sometimes need to disable to edit box. If I hit Alt-A when the edit box is disabled the effect is that the OK button is pressed and that is definitely not what I want. I would prefer to have no action taken in this case. What could I do to workaround this?

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• problem with iOS 4.2 when user press the list view item to go to UIwebview page and the navigation button disappears on the second visit

  - by seahorse

  My app is a Navigation based application. The main menu contains the list view items. if I clicks one of them, it goes to next view which in this case take me to UIwebview embedded web site. Everything is looking great. I can view the content of web page, the navigation control back button which takes to the main menu if I press it. However, I'm having issue when I try to go back to main menu if i visit that subview the second time. It loads the content of UIwebview web page, but the navigation button is gone and won't let me go back to main menu. This problem only appears on latest iOS 4.2 version. Otherwise it works great on 3.1 to 4.1. I would appreciate any hints or inputs. Note this seems not working for subview using UIWebview embedded web content. I don't have any issue with other subviews

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• How do you revert a file to a revision within an integration in Perforce?

  - by tenpn

  I have two branches, let's call them mainline and dev1. I regularly integrate a file from mainline to dev1. The last-but-one time I integrated the file, it was at revision 3 in mainline. The last time, it was at revision 5. Now for mysterious reasons lost to the sands of time, I want to work in dev1 with revision 4 of the file from mainline. Is that possible? I can't integrate it across as P4V complains that all revisions have already been integrated. I've tried right-click-get this revision on the revision graph, but that only updates which version of the file I have in mainline, not in dev1.

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• File download using Java, Struts 2 and AJAX

  - by amar4kintu

  Hello Friends, I want to give file download using java,struts2 and ajax. On my html page there is a button called "export" clicking on which ajax call will be made which will execute a query and will create .xls file using code and I want to give that file for download to user without storing it on hard drive. Does any one know how to do that using struts2 and ajax in java? Is there any example available? Let me know if you need more details from me... Thanks. amar4kintu

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• When to save a variable in viewstate?

  - by Umut

  Hi, I have searched the web for the answer and saw that mostly variables are saved in viewstate on page.prerender event. However, when I save a variable in viewstate on prerender or load events, how can it store the changed value of the variable? Let's say, after page load, user clicked a button and the value of the variable was changed in onClick event of the button. Then the postback event raised since the button was clicked. According to me, the new value should have been lost and cannot be saved in the viewstate if I save the variable in the viewstate only in prerender event. Shouldn't I save the variable in the viewstate just before the postback event rises? Am I wrong? If so, how can viewstate store the new value of the variable? Thanks for the answer in advance..

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• In SQL find the combination of rows whose sum add up to a specific amount (or amt in other table)

  - by SamH

  Table_1 D_ID Integer Deposit_amt integer Table_2 Total_ID Total_amt integer Is it possible to write a select statement to find all the rows in Table_1 whose Deposit_amt sum to the Total_amt in Table_2. There are multiple rows in both tables. Say the first row in Table_2 has a Total_amt=100. I would want to know that in Table_1 the rows with D_ID 2, 6, 12 summed = 100, the rows D_ID 2, 3, 42 summed = 100, etc. Help appreciated. Let me know if I need to clarify. I am asking this question as someone as part of their job has a list of transactions and a list of totals, she needs to find the possible list of transactions that could have created the total. I agree this sounds dangerous as finding a combination of transactions that sums to a total does not guarantee that they created the total. I wasn't aware it is an np-complete problem.

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• Facebook "Like" on iPhone/iPad

  - by half_brick

  Has anyone implemented facebook "Like" on iPhone/iPad? I've done general Facebook Connect implementation before, but it appears they're phasing that out in favour of OAuth and the Graph API? We're trying to give users the ability to "Like" items of content in the app. Each item of content has a corresponding URL for its representation on the website. Will it be possible to implement this kind of functionality (without implementing anything on the server side)? And is there a library that will let us do this easily? Thanks

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• mysql query to concat information from 3 tables - getting incorrect result count

  - by iPfaffy

  I have 3 tables in my database. ab_contacts id first_name last_name addressbook_id ab_addressbooks name id co_comments id link_id comment I'd like to create a query that will let me select all the contacts and comments related to them in a given addressbook. To select all the people in a given addressbook, I can use: select count(*) from ab_contacts where addressbook_id = '50'; This returns 8152 people. However, when I run my query: select ab_contacts.first_name, ab_contacts.last_name, ab_contacts.email, ab_addressbooks.name, co_comments.comments from ab_contacts JOIN ab_addressbooks ON (ab_contacts.addressbook_id = ab_addressbooks.id) JOIN co_comments ON (ab_contacts.id = co_comments.link_id) WHERE ab_contacts.addressbook_id = '50';` the format works, but I only get 1045 results. I'm sure there is something I am missing, but I cannot figure it out. Any help would be greatly appreciated.

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• Shortcut to get all private field names combined with && operator as a generated line of code?

  - by burak ozdogan

  Hi, Is it possible to use reflection when we write a code-template? I was just thinking if it is possible to write a piece of code-template that will return me a list of all private field in the class separated by && operator in Visual Stuudio? Let's say, I will enter "getAllPrivates&&" (or press a shortcut key) in the VS editor and it will return me something like this: private bool _privateFiel1 = false; private bool _privateFiel2 = true; private bool _privateFiel3 = false; private bool _privateFiel4 = false; private bool _privateFiel5 = true; // Here I press the shortcut or call the code-template and get his: _privateFiel1 && _privateFiel2 && _privateFiel3 && _privateFiel4 && _privateFiel5

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• SVN tool to rebase a branch in git style

  - by timmow

  Are there any tools available that will let me rebase in git style an SVN branch onto a new parent? So, in the following situation, I create a feature branch, and there are commits to the trunk E---F---G Feature / A---B---C---D--H--I trunk I'm looking for a tool which copies the trunk, and applies the commits one by one, letting me resolve any conflicts if any exist - but each commit retains the same commit message, and is still a separate commit. E'---F'---G' Feature / A---B---C---D--H--I trunk So commit E' will be a commit with the same changes as E, except in the case of E causing a conflict, in which case E' will differ from E in that E' has the conflicts resolved, and the same commit message as E. I'm looking for this as it helps in keeping branches up to date with trunk - the svnmerge.py / mergeinfo way does not help, as you still need to resolve your changes when you merge back to trunk.

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• Fetch and load a whole page with AJAX

  - by nimo

  I realize that it's generally not a good idea to do this but the reason why I want to is because it's a really heavy page and I want to show the user progress of the download and when it's done load the page. I can either do this with some kind of spinner but is it possible for me to show the actual progress? Can I see how much and what data has been downloaded? Let's say I use jQuery for the AJAX-request how do I do this? If you have other suggestions please feel free to suggest.

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• PHP: Accessing an object property with a variable.

  - by Peter

  Let's assume I have an array of object properties I'd like to access: $properties = array('foo', 'bar'); I'd like to loop through the object and access these properties dynamically (specifically, I'm trying to dynamically handle missing JSON elements based on an array of expected elements): foreach ($data as $item) { foreach ($properties as $property) { if (empty($item->{$property})) { // Do something } } } Each $item in $data should have the properties 'foo' and 'bar'. If empty(), I'll handle them. I'm trying to get the loop (in line 3) to access $item-{'foo'} and $item-{'bar'}, but it's not working. Any idea why? Thanks!

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• How Can I Implement This In Java?

  - by davit-datuashvili

  first of all i am doing programs in java language this code is merely taken from web site i have not question about divide and conqurer algorithms but about function and it's argument here is code of ternary search def ternarySearch(f, left, right, absolutePrecision): #left and right are the current bounds; the maximum is between them if (right - left) < absolutePrecision: return (left + right)/2 leftThird = (2*left + right)/3 rightThird = (left + 2*right)/3 if f(leftThird) < f(rightThird): return ternarySearch(f, leftThird, right, absolutePrecision) return ternarySearch(f, left, rightThird, absolutePrecision) i am not asking once again how implement it in java i am asking for example how define function?for example let y=x^+3 yes we can determine it as public static int y(int x){ return x*x+3; } but here return ternarySearch(f, leftThird, right, absolutePrecision) function f does not have argument and how do such?please help me

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• C# overloading with generics: bug or feature?

  - by TN

  Let's have a following simplified example: void Foo<T>(IEnumerable<T> collection, params T[] items) { // ... } void Foo<C, T>(C collection, T item) where C : ICollection<T> { // ... } void Main() { Foo((IEnumerable<int>)new[] { 1 }, 2); } Compiler says: The type 'System.Collections.Generic.IEnumerable' cannot be used as type parameter 'C' in the generic type or method 'UserQuery.Foo(C, T)'. There is no implicit reference conversion from 'System.Collections.Generic.IEnumerable' to 'System.Collections.Generic.ICollection'. If I change Main to: void Main() { Foo<int>((IEnumerable<int>)new[] { 1 }, 2); } It will work ok. Why compiler does not choose the right overload?

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• When is a Cocoa callback given controll?

  - by Kaspa

  Hi, I've been searching around the web for an answer to this one, but was unable to find an answer, on the other side I think it's something quite common thus there is a possibility I'm missing some keywords here. Anyhow, the problem is as follows: When is control given to a callback function in ObjC (iPhone)? Does it happen after control is given to a high up in the hierarchy class responsible for the runloop? Can it occur in the middle of another function call being executed? As an example, let's take the NSURLConnection, we don't know or can't predict when it's going to call didReceiveResponse or the other callback methods, can it be the case that didReceiveResponse get's called when I'm in the middle of another function? (highly doubt that but was unable to find information on callbacks wating for the end of the run loop) Cheers, Kaspa

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• Django: ordering numerical value with order_by

  - by h3

  I'm in a situation where I must output a quite large list of objects by a CharField used to store street addresses. My problem is, that obviously the data is ordered by ASCII codes since it's a Charfield, with the predictable results .. it sort the numbers like this; 1, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 2, 20, 21.... Now the obvious step would be to change the Charfield the proper field type (IntegerField let's say), however it cannot work since some address might have apartments .. like "128A". I really don't know how I can order this properly ..

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• Converting output of sql query

  - by phenevo

  Hi, Let say I have table Payments Id int autoincement Status int and my query is : select id, status from payments but I wanna convert status to enum. 0 is unpaid 1 is paid. so result should look like: 1 paid 2 unpaid 3 paid ... I need this conversion because I use XmlReader reader = cmd.ExecuteXmlReader(); oc.LoadXml("<results></results>"); XmlNode newNode = doc.ReadNode(reader); while (newNode != null) { doc.DocumentElement.AppendChild(newNode); newNode = doc.ReadNode(reader); } and then I save this xml and opening it by excel, and statuses should be friendly for user.

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• Selling an application both in the android market and outside it

  - by Lo'oris

  I understand it is possible to sell the same application both in the market and outside it, great. I still don't understand a few things, that AFAIK are not mentioned in the contract but I might have missed or misunderstood something, so I'm going to ask. Disclaimer: I know you're not a lawyer, etc. etc. Let's say I give in the market a demo version, and I sell in the market the full version too. May I also sell the full version outside the market? I understand that you can't give away the demo in the market and then collect the payment outside, but what if I do allow the user to buy it in the market, but also allow him to buy outside the market? What if I charge a lower price if he buys outside the market?

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• Access the camera of a Smartphone using libGDX

  - by PH-zero

  I searched the web, browsed through the libGDX wiki, but without success. My Question: Is there a way, to access the camera of smartphones, let the user take a photo, and then store the image in a Texture-instance? I could imagin something like this: @Override public void onCamTrigger(){ ApplicationType appType = Gdx.app.getType(); switch (appType) { case Android: case iOS: Texture someTexture = new Texture(Gdx.input.getCamera().getImage()); //do something with the Texture instance... someTexture.dispose(); break; default: break; } } Of course this is pure fiction! I know that there's a lot more to this like opening the camera, displaying it, then take a photo etc. . But is there a convenience method like this? If so, how does it work? On Android, i think i could implement it without using any convenience methods offered by libGDX, but i have no idea on how this works on iOS =/

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• Deploying Rails app over VPN

  - by DavidGouge

  You'll have to bear with me as I'm not a Ruby dev, but have inherited a Ruby system. I need to deploy some changes to the app from my repository to the server. I've been instructed to run cap deploy and told that that script will get the latest code from my repository and deploy it to the server. My problem is that I have to VPN to get to the production server and the VPN client then blocks access to my local network, cutting off the repository. So my question is, how can I change my deploy.rb so that I can deploy from my local machine instead? Or is there a better way. If you need to see the deploy.rb, please let me know. Thanks Dave

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• Is it possible to launch an Android Activity from an AlertDialog?

  - by YYY

  I am trying to create a small pop-up in my Android application to let the user choose from one of many items, ala a ListView. I am hoping to make it show up as a translucent box that overlays on the screen, as opposed to completely occupying it like Activities usually do. One technique for doing this that I've heard is possible is to launch an Activity in an AlertDialog box. This would be perfect - it's the ideal size and has a lot of the mechanical properties I'm looking for, but I'm totally unable to find any more specifics of this technique. Is this possible? And if not, what is the preferred way of accomplishing something like this?

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• R: Given a set of random numbers drawn from a continuous univariate distribution, find the distribut

  - by knorv

  Given a set of real numbers drawn from a unknown continuous univariate distribution (let's say is is one of beta, Cauchy, chi-square, exponential, F, gamma, Laplace, log-normal, normal, Pareto, Student's t, uniform and Weibull).. x <- c(15.771062,14.741310,9.081269,11.276436,11.534672,17.980860,13.550017,13.853336,11.262280,11.049087,14.752701,4.481159,11.680758,11.451909,10.001488,11.106817,7.999088,10.591574,8.141551,12.401899,11.215275,13.358770,8.388508,11.875838,3.137448,8.675275,17.381322,12.362328,10.987731,7.600881,14.360674,5.443649,16.024247,11.247233,9.549301,9.709091,13.642511,10.892652,11.760685,11.717966,11.373979,10.543105,10.230631,9.918293,10.565087,8.891209,10.021141,9.152660,10.384917,8.739189,5.554605,8.575793,12.016232,10.862214,4.938752,14.046626,5.279255,11.907347,8.621476,7.933702,10.799049,8.567466,9.914821,7.483575,11.098477,8.033768,10.954300,8.031797,14.288100,9.813787,5.883826,7.829455,9.462013,9.176897,10.153627,4.922607,6.818439,9.480758,8.166601,12.017158,13.279630,14.464876,13.319124,12.331335,3.194438,9.866487,11.337083,8.958164,8.241395,4.289313,5.508243,4.737891,7.577698,9.626720,16.558392,10.309173,11.740863,8.761573,7.099866,10.032640) .. is there some easy way in R to programmatically and automatically find the most likely distribution and the estimated distribution parameters?

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• 2 DataBase Schema's syncronization in Oracle 10G

  - by gnash-85

  Hi Masters, Good Day, I am new very naive to oracle DB. I am using Oracle 10G. Let me explain to you. I have one source database named ( DB1) and Target Database named (DB2). I have 2 schema's named dbs1 and dbs2 in the source database (DB1). I have exported both the database schema in Source Database (DB1) and imported it successfully into the Target Database (DB2). Now I face a challenge in synchronizing these database schema's every time from Source DB (DB1) to Target DB (DB2). Can anyone please help in letting me know how can achieve this synchronization. It would a great help. Thanks Nash

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• Using Rails, how can I set my primary key to not be an integer-typed column?

  - by Rudd Zwolinski

  I'm using Rails migrations to manage a database schema, and I'm creating a simple table where I'd like to use a non-integer value as the primary key (in particular, a string). To abstract away from my problem, let's say there's a table employees where employees are identified by an alphanumeric string, e.g. "134SNW". I've tried creating the table in a migration like this: create_table :employees, {:primary_key => :emp_id} do |t| t.string :emp_id t.string :first_name t.string :last_name end What this gives me is what seems like it completely ignored the line t.string :emp_id and went ahead and made it an integer column. Is there some other way to have rails generate the PRIMARY_KEY constraint (I'm using PostgreSQL) for me, without having to write the SQL in an execute call? NOTE: I know it's not best to use string columns as primary keys, so please no answers just saying to add an integer primary key. I may add one anyway, but this question is still valid.

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