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• What is the difference between (object!=null) and (null!=object)? (Java being the language of choice

  - by palakaluri

  if(null!=object) //do something and if(object!=null) // do something Any performance improvement involved in this type of null checking. (I know null checking is sort of ugly)

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• Datamapper In Memory Database

  - by Daniel Ribeiro

  It is easy to setup Datamapper with a Sqlite3 in memory database with: DataMapper.setup :default, 'sqlite3::memory:'. However, when testing, I'd like to destroy the whole in memory database after each test, instead of invoking automigrate! as a shortcut on dropping everything. Is it possible? Or is it enough to set the default repository to nil, and let the garbage collector dispose of it?

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• move an object towrds touch

  - by Viral

  hi friends, I want to move an object over the screen where ever the touch moves, i.e. If I touch and drag my finger then the object should get moved, if any one know about this how to perform, please let me know. Thank you in advance, vira.

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• How to add database layer in core data application

  - by aditya

  Hi all I am fairly new to core data technology and i searched a lot on how to add the database to a core data application.so can anybody guide me on how to integrate the database layer? i have seen the iphone tutorial on core data (i.e books example) but i am not able to understand how to .sqlite file has been included in that application

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• MySQL database Int overflow and can't login in.

  - by Ryan SMith

  I have a MySQL database on my server and I"m pretty sure it's an int over flow on one table with an auto_increment field that's crashing it. I can delete the table, it's not very important, but I can't get into the server. Is there anyway to delete that database from the file system or without logging into MySQL? HELP! THE WORLD IS ENDING!

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• Object slicing in Java.

  - by ferrari fan

  Can you take a subclass object and somehow convert it to an object of the same type as the parent class and at the same time slicing all the fields that are not part of the parent class? I know you can do this in C++, but I have no idea how to do it in Java.

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• Converting a ts (Time Series) object to a Vector in R

  - by taskforce145

  I need to use a function on a vector that does not take a ts object. I'm trying to convert it to a plain old vector but I just can't seem to figure it out. I googled around but mostly people are trying to convert data types into ts object. I want to go the other way. Any help would be appreciated.

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• Saving elements to database with $.ajax()

  - by Justin Meltzer

  I'm trying to save dynamically created elements in my application.js file to the database. Would the code look something like this?: $.ajax({ type: "POST", data: { title: 'oembed.title', thumbnail_url: 'oembed.thumbnail_url'} }); Is there anything I'm missing? Assume that oembed.title and oembed.thubnail_url hold the values I want to save, and that title and thumbnail are the database columns.

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• My first c# app and first null object exception

  - by Fresheyeball

  Total noob here. This is my first c# attempt, its a console application that simulates a drinking game called 'Left Right Center'. In the console I receive the following: CONSOLE Unhandled Exception: System.NullReferenceException: Object reference not set to an instance of an object at LeftRightCenter.MainClass.Main (System.String[] args) [0x00038] in /Users/apple/Projects/LearningC/LearningC/Main.cs:80 [ERROR] FATAL UNHANDLED EXCEPTION: System.NullReferenceException: Object reference not set to an instance of an object at LeftRightCenter.MainClass.Main (System.String[] args) [0x00038] in /Users/apple/Projects/LearningC/LearningC/Main.cs:80 C# using System; namespace LeftRightCenter { class Player { //fields private int _quarters = 4; public int Quarters { get{ return _quarters; } set{ _quarters += value; } } public Player (string name) { } } class Dice { Random random = new Random(); public int Roll () { random = new Random (); int diceSide; diceSide = random.Next (0, 6); diceSide = (diceSide > 2) ? 3 : diceSide; return diceSide; } } class MainClass { static int activePlayer = 0; static int theCup = 0; static Player[] thePlayers = { new Player ("Jessica"), new Player ("Isaac"), new Player ("Ed"), new Player ("Bella"), new Player ("Elisa"), new Player ("Fake RedHead"), new Player ("Linda"), new Player ("MJ"), new Player ("Irene"), new Player("Devin") }; static Dice[] theDice = new Dice[2]; private static void MoveQuarter (int direction) { int numberOfPlayers = thePlayers.Length - 1; switch (direction) { case 0: thePlayers [activePlayer].Quarters = -1; theCup++; break; case 1: thePlayers [activePlayer].Quarters = -1; int leftPlayer = (activePlayer == 0) ? numberOfPlayers : activePlayer - 1; thePlayers [leftPlayer].Quarters = +1; break; case 2: thePlayers [activePlayer].Quarters = -1; int rightPlayer = (activePlayer == numberOfPlayers) ? 0 : activePlayer + 1; thePlayers [rightPlayer].Quarters = +1; break; } } public static void Main (string[] args) { int cupEndPoint = thePlayers.Length * 4 - 1; while (theCup < cupEndPoint) { foreach (Dice rattle in theDice) { if (thePlayers [activePlayer].Quarters > 0) { MoveQuarter (rattle.Roll ()); // this line seems to be the problem } } Console.WriteLine ("{0} Quarters In the Cup", theCup); } } } } I have no idea what the problem is or why, and my googling have proven more use confusing than helpful.

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• can we create database checkpoints for Web applications?

  - by Ankit Sachan

  Hello, Its regarding QTP can we create database checkpoints for Web applications actually while creating database checkpoints we have to create DSN . So my question is can we create DSN for remote databases hosted on some other server. Please enlighten me on this.

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• java.sql.SQLException: database locked

  - by rajkumari

  Hello We are using sqllite056 jar in our code. While inserting into database in batch we are getting exception on line when we going to commit. Lines of Code <object of Connection> .commit(); <object of Connection>.setAutoCommit(true); Exception java.sql.SQLException: database locked

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• Object Pooling managment algorithm.

  - by Talha Bin Shakir

  Hi, Anyone can help me to write an algorithm for object pooling. I am very new in J2EE and i need object pooling for database connection. So please help out. Thanks

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• How to save multiple column in database

  - by shamim

  I have a text file.I need to get data from this text file and show on grid , 1)After this user can update information from gridview, 2)Click on save button save data on database. Before clicking on button data don't save on database.How to do that?

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• Can Entity Framework model be passed a SQL script to be run against the database

  - by Greg

  Is it possible to pass a SQL script to some method that Entity Framework has to run it against my model? e.g. equivalent of: context.ExecuteStoreCommand(<tsql script path>); Background: I want a way to reset the database during unit tests, and making a call to run the EF generated TSQL script (from Generate Database from Model) seems one way to achieve this.

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• Send shrink Command to Microsoft SQL Database file via Ado.net connection

  - by user287107

  How is it possible to execute a direct SQL command to an ADO.NET connected database? I want to send a DBCC SHRINKDATABASE to the SQL server, to compress the current datafile after a big deletion process. The function ObjectContext::CreateQuery returns a parser error after the DBCC command. Is there any other way to shrink the database file, or another way to send the SQL command directly to the SQL Server?

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• Inexpensive was to add seek to a filetype object

  - by becomingGuru

  PdfFileReader reads the content from a pdf file to create an object. I am querying the pdf from a cdn via urllib.urlopen(), this provides me a file like object, which has no seek. Now, what can I do to avoid writing to disk and reading it again via file(). Thanks in advance.

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• apache derby database

  - by mohit

  i am building a swing application with apache derby database as back end in netbeans 6.8 with my friend.He is making the databse in derby while i am making the front end i.e. frames. now how do i use database created by him in my project in netbeans 6.8 my motive is to how we insert a already build databse(from my friend's netbeans) into the the services tab of my application.

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• Accessing MySQL database from iphone

  - by Jayshree

  Hi i am trying to connect my iphone aap directly to the MySQL database. I did a lot of reading, and i found that by using MCPkit we can access the database. Now i also found that the mcpkit is not supported in iphone, while it runs in simulater. Can somebody tell me whats the deal with this. I know the other alternative is web services, but i have to directly connect to the DB. so please can somebody help me with this problem.

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• asp binding returning wrong value from database

  - by john

  When I bind a url using the productID field from my access database it returns the wrong value for example as my database starts with the first field as 2 it returns -1, then -2 for 3 and so on. <a href='details.aspx?ID=<%#Eval("ProductID") %>'> thanks

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• how to delete all records from database using linq

  - by Samir

  how to delete all records from database using linq.i want to delete all records from the database using linq.i am using MVC.so please tell me the code to delete all records using repository. reply me soon thanks samir

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• How do you work with the hierarchyid data type in a dataset or object

  - by Luke101

  Hello, I would like to work with the hierarchyid in a dataset or custom object. I am not sure how to get parents, children, siblings and other functions will the data is in memory. I can do it within the database but once the info is pulled out of the database into a dataset and cached -- how do you work with it then?

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• Loop through Json object

  - by Tanmoy

  I have a JSON object like the following var p = { "p1": "value1", "p2": "value2", "p3": "value3" }; Now I want to loop through all p elements (p1,p2,p3...) and get their key and values. How can I do that? I can modify the Json object if necessary . My ultimate goal is to loop through some key value pairs. And if possible I want to avoid using eval.

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• Upload a file to sql database with delphi and after download

  - by Rapunzo

  I am working to make a basic file database, but I couldn't find the true codes. Can anyone help me to save an exe file to sql database after read, download and use when I need it? With Delphi

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• git (any SCM) and compiling object files, switching branches, physiology thereof

  - by IanVaughan

  If I compile branch A, then switch to branch B, compile, and switch back to branch A. All the object files touched by the compile of branch B have to be recompiled! Normally one does not check-in object files, but there seems little choice here. What are the ideal working practices here?

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• database conection problem in objective-c

  - by kunal-dutta

  hi.. When i used database connection with sqlite in iPhone that time data is fetched in only once fromdatabase.Next time i can insert data but cant fetch the data from database.So plz help me out to solve this problem. Thnx Kunal

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