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• What is the default behavior of Equals Method?

  - by Mostafa Mahdieh

  Let A be a class with some members as x, y, z: Class A { int x; int y; String z; ... } A is an Object so it inherits the "Equals" functions defined in Object. What is the default behavior of this function? Does it check for the equality of members or does it check for reference equality?

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• PHP Force Apache error

  - by Rolf

  Hi dear stackers :P Thanks to this forum, I learnt PHP header function does not actually send header to Apache server but only to the client. What I wanna do is to generate an error 500, and let Apache displays its corresponding page. Is there a way to force it ? Thanks in advance ! (and allez les bleus !)

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• Is calculating an MD5 hash less CPU intensive than SHA-1 or SHA-2?

  - by Mick

  Is calculating an MD5 hash less CPU intensive than SHA-1 or SHA-2 on "standard" laptop x86 hardware? I'm interested in general information, not specific to a certain chip. UPDATE: In my case, I'm interested in calculating the hash of a file. If file-size matters, let's assume its 300K.

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• Mysql query trouble: uploading

  - by Jakub Zak

  I'm trying for last hour solve this problem. I have a long form and I'm trying to upload info into mysql database. Into table I made. This is the mysql query I'm using: mysql_query("INSERT INTO `users_temp`(`first_name`, `surname`, `birthday`, `nationality`, `email`, `mobile`, `landline`, `address`, `town`, `post_code`, `country`, `password`, `code_conf`) VALUES ([$f_name],[$s_name],[$bday],[$nationality],[$email],[$mobile],[$landline],[$address],[$town],[$post_code],[$country],[$pass],[$conf_code])"); If anyone see any problem why it doesn't work pls let me know. Thank you...

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• T-SQL: How to know how much storage space is left in sql server express?

  - by user193655

  How is it possible to know how much of the "DB quota" imposed by SQL Server express edition (4GB in old versions, 10GB in 2008R2) is in use? Let's say I have a DB that is using 1GB, I want to know "9GB of free space". Is it there a T-SQL command for this?

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• Android: Text primary key with different name

  - by Echilon

  I have an existing Windows app for which I'm writing an Android port. The app uses a unique string as the primary key, but the SQLite methods in Android all seem to work with integers and a column names _id, whereas my ID column isn't called this. Is there a way to let Android know I have a key with a different column name?

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• Instance caching in Objective C

  - by zoul

  Hello! I want to cache the instances of a certain class. The class keeps a dictionary of all its instances and when somebody requests a new instance, the class tries to satisfy the request from the cache first. There is a small problem with memory management though: The dictionary cache retains the inserted objects, so that they never get deallocated. I do want them to get deallocated, so that I had to overload the release method and when the retain count drops to one, I can remove the instance from cache and let it get deallocated. This works, but I am not comfortable mucking around the release method and find the solution overly complicated. I thought I could use some hashing class that does not retain the objects it stores. Is there such? The idea is that when the last user of a certain instance releases it, the instance would automatically disappear from the cache. NSHashTable seems to be what I am looking for, but the documentation talks about “supporting weak relationships in a garbage-collected environment.” Does it also work without garbage collection? Clarification: I cannot afford to keep the instances in memory unless somebody really needs them, that is why I want to purge the instance from the cache when the last “real” user releases it. Better solution: This was on the iPhone, I wanted to cache some textures and on the other hand I wanted to free them from memory as soon as the last real holder released them. The easier way to code this is through another class (let’s call it TextureManager). This class manages the texture instances and caches them, so that subsequent calls for texture with the same name are served from the cache. There is no need to purge the cache immediately as the last user releases the texture. We can simply keep the texture cached in memory and when the device gets short on memory, we receive the low memory warning and can purge the cache. This is a better solution, because the caching stuff does not pollute the Texture class, we do not have to mess with release and there is even a higher chance for cache hits. The TextureManager can be abstracted into a ResourceManager, so that it can cache other data, not only textures.

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• Ruby: Integer.times - how do I know what iteration I'm in?

  - by Forkrul Assail

  Let's say I have some_value = 23 I use the integer and the .times to loop. Inside the iteration, is there an easy way, without keeping a counter, to see what iteration the loop is currently in?

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• Handle iterable and non-iterable seamlessly

  - by Cheolho

  Could you let me know how I can optimize the following code? def f(y, list_or_elem): if getattr(list_or_elem, '__iter__'): y = max(y, *list_or_elem) else: y = max(y, list_or_elem)

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• I was doing some moving around in SVN, and copying files back and forth. Now I can't use it.

  - by alex

  I deleted files in my SVN, and dragged new files into it over WINSCP. Now, I try to add all the files and commit, but it won't let me. $ svn add * svn: '.' is not a working copy svn: Can't open file '.svn/entries': No such file or directory

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• Mercurial Workflow (Shared Files)

  - by Jake Pearson

  Let's say I have programmers and artists working on a project. The artists have some folders they care about: /Doodles /Images/Jpgs And maybe the programmers have a folder like this: /Code/View/Jpgs What is the best process in Mercurial to keep the 2 Jpgs folders synced? I have used Vault, where you can have 2 or more files/folders linked in a repository so updating one updates another. Is there a way to do the same thing with Mercurial?

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• How to Validate with ASP.NET MVC - Model State is Invalid When Form Submitted

  - by DaveDev

  I am trying to validate a form in MVC. I add custom errors to model state and get it as invalid when form is submitted. When the view is displayed it doesn’t show validation messages nor validation summary. Can anyone please let me know what am I doing wrong or point me in the right direction if there is any other way of validating? Thanks

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• using Inheritence with GUI (graphical user interfaces) in Java

  - by maya

  hi everyone, I work on inheritence with GUI (graphical user interfaces) let me explain for example I made super class which is vehicle and the subclass is car, so the code to make inheritence will be public class Car extends Vehicle then I want to build the class Car as JFrame like public class Car JFrame implements ActionListener { so the problem is that I couldn't put both codes in the same class, and I need to do that. anyone help me. thanks in advance I wish that the question would be clear

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• C++ based rule engine

  - by vijay

  i am looking for a good c++ rule engine. can you please let me know if there there any XML based rule engine for C++

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• Open archive file content in OpenFileDiaolg C#

  - by Guy

  Hi All, I want an Open File Dialog with *.class ,*.jar filters. I want that *.jar files will be treated as folders (pressing OK or double-click should display the jar file content [ *.class] ). This capability is very similar to the TotalCommander archive plugin that let you browse inside archive files in-place (without the need to extract them, etc...) Any ideas how it could be done? Can I use something that is already implemented? Thanks, Guy

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• how to downlaod and configure phpimage for TinyMCE

  - by air

  actually i am looking for some best html editor for my CMS system. witch support (PHP, JQUERY) i found TinyMCE but it dont have image upload functionality, after i found phpimage for this but every time i goto http://sourceforge.net/tracker/?func=detail&aid=2844769&group_id=103281&atid=738747 and click on files, i get normal TinyMCE my question is how to find phpimage to download and configure it. if you know any other FREE HTML editor with image uplaod let me know. Thanks

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• Is there any function in SQL Server to convert a number into Time format?

  - by Shashi Bhushan

  I am getting a whole number for the duration of product. For example : 62, 103, 184, 4543. I want to convert it in time format. Let say , in case of 62, it would format like '00:01:02'. I am looking for a function which can resolve my problem. Is there any function in SQL Server which convert a number into time format?

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• What's your choice for your next Asp.Net project: WebForms or MVC?

  - by Click Ok

  Let's say that you will start a new Asp.Net web site/application tomorrow. What your choice between WebForms and MVC, and why?

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• Saving an XML that has invalid characters

  - by BDotA

  there are code snippets that strip the invalid characters inside a string before we save it as an XML ... but I have one more problem: Let's say my user wants to have a column name like "[MyColumnOne] ...so now I do not want to strip these "[","] well because these are the ones that user has defined and wants to see them so if I use some codes that are stripping the invalid characters they are also removing "[" and "[" but in this case I still need them to be saved... what can I do?

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• Best way to add a column in mysql query

  - by PHP-Prabhu

  Can any one please let me know that, I need to add a column dynamically when executing mysql query Table: Table1 -------------------------- col1 col2 col3 -------------------------- Test OK Test3 Test OK Test5 Test OK Test6 from the above example i need to introduce "col2" as new column and its value to be as "OK"

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• Do the speed of the query depends on the number of rows in the table ?

  - by Omu

  let's say I have this query: select * from table1 r where r.x = 5 do the speed of this query depends on the number of rows that are present in table1 ?

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• rename tablenames of asp.net administration tool's website

  - by user331110

  i have rename the table name of asp.net administration tool's website now its not working when i click on security it gives an error(invalid server name or credentials, or by insufficient permissions) so please let me know if any one have solution.

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• asp.net c# ip address lost after postback?

  - by Mark

  Hi all, One of my functions in a class is called GetIpAddress() which returns the following string: System.Web.HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"] This all works well in regular page loads and gets my ip address, but when i for example let a user place a comment, then the ip address is lost after postback and i get an empty string returned. Am I missing something here maybe? Kind regards, Mark

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• Entity Framework 2.0: Cannot update EntityCollection

  - by timmits

  Let's say we have the "EntityCollection products". Then the following doesn't work: foreach (var product in products) { product.LastUpdate = DateTime.Now(); } As you can also not index an EntityCollection, how do you modify an entity in en EntityCollection?

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• Move 3 rectangles up in their X but keep order of rectangles

  - by Nicolas Martel

  I have 3 rectangles being rendered here. Let's say i wanted to move them all above the line yet keep their order, how would i go about that? I tried subtracting the Y and height rather than adding the Y it but as expected, the lower rectangle goes at the top, middle stays in the middle and top goes to the bottom before: after: So is there any simple solution to render them just above rather than having to change all values ?

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