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  • How to see "anti if" movement and its gaol?

    - by Vijay Shanker
    I have a developer for last 3 years, have been using if-else or if-else if statements a lot in my programing habit. And today, I found This link. One obvious sample i put here public void doSomthing(String target, String object){ //validate requests if(target != null && target.trim().length() < 1){ //invalid request; } //further logic } Now, I have seen this sort of check all over the places, libraries. So, I wanted to have a discussion about the worthiness of such a movement. Please let me know your views.

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  • Python. Strange class attributes behavior

    - by Eugene
    >>> class Abcd: ... a = '' ... menu = ['a', 'b', 'c'] ... >>> a = Abcd() >>> b = Abcd() >>> a.a = 'a' >>> b.a = 'b' >>> a.a 'a' >>> b.a 'b' It's all correct and each object has own 'a', but... >>> a.menu.pop() 'c' >>> a.menu ['a', 'b'] >>> b.menu ['a', 'b'] How could this happen? And how to use list as class attribute?

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  • Ruby on Rails: Is there a way to tell what fields failed validation in ActiveRecord?

    - by randombits
    I'm attempting to create an XML builder file that tells a user to know exactly what fields failed validation in the output. I also want to display their input back to them, so that requires me figuring out which fields failed validation. Meaning if someone fails on creating a new user resource, I want to display XML that's meaningful (Besides a meaningful HTTP status number) such as: <errors> <user> <email>bad@email: Invalid email format</email> </user> <errors> The above is tough to do in an XML builder file without knowing what field failed. And if I just iterate over error messages, I won't know how to prob my @user object to get the value that the user supplied.

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  • Grails: can remoteField update multiple fields?

    - by Michael Bavin
    Hi, Assume i have a book entity with an isbn field. When entered a isbn number, i want 2 fields to be updated: title and author. My controller looks like this: def ajaxGetBook = { def book = Book.findByIsbn(params.isbn) if(book==null) book = new Book() render book as JSON } So my call works, and i get a full JSON Book. Now i would like to update 2 texfields by the update attribute <g:remoteField action="ajaxGetBook" update="title" name="isbn" value="${bookInstance?.book?.isbn}" paramName="isbn"/> Now the title field gets updated with the full book object, so that doesn't work. Is it possible to update field title with only the JSON book.title? Is it possible to update more fields at once? I could render book.title as JSON but that works for only one field. Thank you

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  • Generic Dictionary - Getting Convertion Error

    - by pm_2
    The following code is giving me an error: // GetDirectoryList() returns Dictionary<string, DirectoryInfo> Dictionary<string, DirectoryInfo> myDirectoryList = GetDirectoryList(); // The following line gives a compile error foreach (Dictionary<string, DirectoryInfo> eachItem in myDirectoryList) The error it gives is as follows: Cannot convert type 'System.Collections.Generic.KeyValuePair<string,System.IO.DirectoryInfo>' to 'System.Collections.Generic.Dictionary<string,System.IO.DirectoryInfo>’ My question is: why is it trying to perform this conversion? Can I not use a foreach loop on this type of object?

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  • getting usb com port

    - by I__
    i have this function: private string GetUSBComPort() { string[] sPorts = SerialPort.GetPortNames(); foreach (string port in sPorts) { if (port != "COM1" && port != "COM4") { return port; } } return null; } this function is being called from form load: private void Form1_Load(object sender, EventArgs e) { serialPort1 = new SerialPort(GetUSBComPort()); if (serialPort1.IsOpen) { serialPort1.Close(); } serialPort1.Open(); //ThreadStart myThreadDelegate = new ThreadStart(ReceiveAndOutput); //Thread myThread = new Thread(myThreadDelegate); //myThread.Start(); this.serialPort1.DataReceived += new SerialDataReceivedEventHandler(sp_DataReceived); } the function is unfortunately returning null how do i get the com port to which my phone is attached to via USB?

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  • How can I open another tab in the browser from the Code Behind [duplicate]

    - by Daniel Powell
    This question already has an answer here: Response.Redirect to new window 18 answers I have an ASP.Net project that I am working on that involves opening another tab in the browser from the vb.net (code behind). I have tried to use the WebBrowser control to open the new tab as well as tried to use the Script manager however I have not been able to open the new tab. The button I am using is a custom button in a DevExpress GridView, and I am handling its click with this code: Private Sub ASPxGridView2_CustomButtonCallback(sender As Object, e As DevExpress.Web.ASPxGridView.ASPxGridViewCustomButtonCallbackEventArgs) Handles ASPxGridView2.CustomButtonCallback If e.ButtonID <> "customButton" Then Return End If Dim neededID = ASPxGridView2.GetRowValues(e.VisibleIndex, "target") Dim id = CStr(neededID) Dim url = ("targetPage.aspx" + "?ID=" + id) Dim wb As WebBrowser wb.Navigate(url,True) End Sub I'm not sure why this would not work, any suggestions as to how I should open a new browser tab with or without the WebBrowser works for this project. EDIT: I cannot use javascript with this ASPxGridview So I need an answer that doesn't involve modification to the javascript except through the vb.net code behind

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  • Static initialization of a struct with class members

    - by JS Bangs
    I have a struct that's defined with a large number of vanilla char* pointers, but also an object member. When I try to statically initialize such a struct, I get a compiler error. typedef struct { const char* pszA; // ... snip ... const char* pszZ; SomeObject obj; } example_struct; // I only want to assign the first few members, the rest should be default example_struct ex = { "a", "b" }; SomeObject has a public default constructor with no arguments, so I didn't think this would be a problem. But when I try to compile this (using VS), I get the following error: error C2248: 'SomeObject::SomeObject' : cannot access private member declared in class 'SomeObject' Any idea why?

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  • Help, I need to debug my BrowserHelperObject (BHO) (in C++) after a internet explorer 8 crash in Rel

    - by BHOdevelopper
    Hi, here is the situation, i'm developping a Browser Helper Object (BHO) in C++ with Visual Studio 2008, and i learned that the memory wasn't managed the same way in Debug mode than in Release mode. So when i run my BHO in debug mode, internet explorer 8 works just fine and i got no erros at all, the browser stays alive forever, but as soon as i compile it in release mode, i got no errors, no message, nothing, but after 5 minutes i can see through the task manager that internet explorer instances are just eating memory and then the browser just stop responding every time. Please, I really need some hint on how to get a feedback on what could be the error. I heard that, often it was happening because of memory mismanagement. I need a software that just grab a memory dump or something when iexplorer crashes to help me find the problem. Any help is appreciated, I'll be looking for responses every single days, thank you.

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  • NSString potential leak

    - by VansFannel
    Hello. When I build and analyze my project on XCode, I obtain a 'warning' on the following line: NSString *contactEmail = (NSString *)ABMultiValueCopyValueAtIndex(emailInfo, 0); The message is: Potential leak on object allocated on line ... and stored into contactEmail. Is there any error on that line? UPDATE I get the same 'warning' with this line of code: ABMultiValueRef emailInfo = ABRecordCopyValue(person, kABPersonEmailProperty); But here, I can't do this: [emailInfo release]; I'm developing for iPhone.

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  • How can I change ruby log level in unit tests based on context

    - by Stuart
    I'm new to ruby so forgive me if this is simple or I get some terminology wrong. I've got a bunch of unit tests (actually they're integration tests for another project, but they use ruby test/unit) and they all include from a module that sets up an instance variable for the log object. When I run the individual tests I'd like log.level to be debug, but when I run a suite I'd like log.level to be error. Is it possible to do this with the approach I'm taking, or does the code need to be restructured? Here's a small example of what I have so far. The logging module: #!/usr/bin/env ruby require 'logger' module MyLog def setup @log = Logger.new(STDOUT) @log.level = Logger::DEBUG end end A test: #!/usr/bin/env ruby require 'test/unit' require 'mylog' class Test1 < Test::Unit::TestCase include MyLog def test_something @log.info("About to test something") # Test goes here @log.info("Done testing something") end end A test suite made up of all the tests in its directory: #!/usr/bin/env ruby Dir.foreach(".") do |path| if /it-.*\.rb/.match(File.basename(path)) require path end end

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  • Checking validation errors in XMLHttpRequest

    - by egaga
    $.post(actionUrl, serializedForm, function(response) { ... } I need to check whether validation of form succeeded, or not (I don't need to know the exact validation errors). The validation is done by Spring, and I wouldn't like to interfere the process, because there's some annoying dependencies. What would be the best approach? Is there a Spring error object in response, or is it accessible only in server side? I would also like to know if there's is any proper documentation about response in jQuery site? How can I traverse or manipulate it?

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  • Hold the command prompt until user close it from close button.

    - by Kasun
    Hi, I going to get the command prompt from my C# application to compile some C++ files. Code is like this. private void button1_Click(object sender, EventArgs e) { string filePath = @"C:\Program Files\Microsoft Visual Studio 9.0\VC\bin\cl.exe"; System.Diagnostics.Process.Start(filePath); } But After i click the button it suddenly comes and disappear. Even its opening two command prompts. I need to Hold it and only one command prompt should appear. Can some one provide me the necessary codes. Thank you.

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  • XAML-based applications - Event Naming Conventions for C#

    - by user118190
    For event handling, I am starting to see many coders doing this: XButton.Click += OnXButtonClicked() ... void OnXButtonClicked() { ... } Where did this On_ convention come from? It just doesn't feel right in terms of methods. I am starting to see this as well and am wondering what others thought: XButton.Click += HandleXButtonClick() ... void HandleXButtonClick() { ... } When using intellisense, Visual Studio handles these like so: XButton.Click += XButton_Click; ... void XButton_Click(object sender, RoutedEventArgs e) { ... } I am seeking some advice on these naming conventions and would greatly appreciate some advice.

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  • Add Many-to-Many Entity Framework

    - by tomcamara
    I've got a question: I have 3 tables: Users Menu UserMenu UserMenu contains IdMenu and IdUser. In My DataModel Entity Framework 4.0, I'm filling my User Model and filling User.Menu (Menu is Navigation Properties) with an existing Menu of my table Menu. I have to save User and Save each related menu item in UserMenu table. I get the following exception: The ObjectStateManager does not contain an ObjectStateEntry with a reference to an object of type 'SGGED.Model.Menu'. Code Users objUser = new Users(); objUser.name = itemUsers.name.Trim(); objUser.email = itemUsers.email.Trim(); objUser.password = Util.HashString("12345"); objUser.effdt = DateTime.Now; objData.Users.AddObject(objUser); foreach (var itemMenu in itemUsers.Menu) { objData.ObjectStateManager.ChangeObjectState(itemMenu, EntityState.Unchanged); } affRows = objData.SaveChanges(); Whats the way to handle this issue? Best Regards, Miltom Camara

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  • Embed form in another website - pitfalls

    - by Paddy
    Scenario: We provide a hosted site that clients pay to use internally (a tool to support their business workflow). We have a requirement to provide a form that the clients can 'embed' in their outward facing site. This form will permit a member of the public to enter some details to register an interest - this data will be pushed to our remote system. Question: I'm currently planning on creating a simple HTML page that the client's web guys can include in a simple fashion on their site (either using an iframe or an object tag). If I do this, am I going to run into difficulties when the user tries to submit the embedded form (as it will be going to different domain to the one they are currently browsing)? I had a look at google adsense and I see that they just provide a link to a JS file that renders their ads - I'm not sure I see the advantage in this, but if anybody has any bright ideas... Whatever technique that gets used, I'll have to authenticate the request as coming from my client's site(s).

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  • java.lang.classcastExcption

    - by Tara Singh
    Hi, I have an array list of objects in my application. private static ArrayList<Player> userList=new ArrayList<Player>(); In my application, I am converting this list to byte array and then sending it to other clients. At client When I am trying to cast it back to the ArrayList, its giving me casting error. I am doing this in client side after receiving this list as byte array: ArrayList<Player> pl = (ArrayList<Player>) toObject(receivedByteArray); where toObject is my function to convert the byte array to object; Any Suggestions please !!! Thanks.

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  • Take advantage of multiple cores executing SQL statements

    - by willvv
    I have a small application that reads XML files and inserts the information on a SQL DB. There are ~ 300 000 files to import, each one with ~ 1000 records. I started the application on 20% of the files and it has been running for 18 hours now, I hope I can improve this time for the rest of the files. I'm not using a multi-thread approach, but since the computer I'm running the process on has 4 cores I was thinking on doing it to get some improvement on the performance (although I guess the main problem is the I/O and not only the processing). I was thinking on using the BeginExecutingNonQuery() method on the SqlCommand object I create for each insertion, but I don't know if I should limit the max amount of simultaneous threads (nor I know how to do it). What's your advice to get the best CPU utilization? Thanks

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  • Objective-C property getter

    - by Daniel
    What is technically wrong with the following: @property(nonatomic, assign) NSUInteger timestamp; @property(nonatomic, readonly, getter = timestamp) NSUInteger startTime; @property(nonatomic, assign) NSUInteger endTime; I am sure I can find a better way to organise this, but this is what I ended up with at one point in my project and I noticed that accessing the startTime property always returned 0, even when the timestamp property was set to a correct timestamp. It seems having set the getter of startTime to an existing property (timestamp), it is not forwarding the value of timestamp when I do: event.startTime => 0 event.timestamp => 1340920893 All these are timestamps by the way. Just a reminder, I know the above should have happened in my project but I don't understand why accessing startTime doesn't forward onto timestamp property. UPDATE In my implementation I am synthesising all of these properties: @synthesize timestamp, endTime, startTime; Please check an example object to use that demonstrates this at my gist on GitHub: https://gist.github.com/3013951

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  • Polymorphic behavior not being implemented

    - by Garrett A. Hughes
    The last two lines of this code illustrate the problem: the compiler works when I use the reference to the object, but not when I assign the reference to an array element. The rest of the code is in the same package in separate files. BioStudent and ChemStudent are separate classes, as well as Student. package pkgPoly; public class Poly { public static void main(String[] arg) { Student[] stud = new Student[3]; // create a biology student BioStudent s1 = new BioStudent("Tom"); // create a chemistry student ChemStudent s2 = new ChemStudent("Dick"); // fill the student body with studs stud[0] = s0; stud[1] = s1; // compiler complains that it can't find symbol getMajor on next line System.out.println("major: " + stud[0].getMajor() ); // doesn't compile; System.out.println("major: " + s0.getMajor() ); // works: compiles and runs correctly } }

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  • Howto take a glimpse into mscorlib?

    - by panny
    Hi all! I want to read data into RSAParameters structure ( RSAParameters ) and did check twice, that the data is correct. But still, I get an error "invalid data" exception for this: bei System.Security.Cryptography.CryptographicException.ThrowCryptogaphicException(Int32 hr) bei System.Security.Cryptography.Utils._ImportKey(SafeProvHandle hCSP, Int32 keyNumber, CspProviderFlags flags, Object cspObject, SafeKeyHandle& hKey) bei System.Security.Cryptography.RSACryptoServiceProvider.ImportParameters(RSAParameters parameters) How can I take a look into the source code to check why _ImportKeys is throwing an exception? I have no experience with .dll 'decryption'..are there any symbols to reference somewhere for visual studio 8.0? Thank you.

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  • Access to Oracle Database with sqlapi C++

    - by Meloun
    Hi, I need to write some data in several database. I choose sqlapi.com I have made it for mysql and mssql. Now I have Problem with Oracle database. I have installed server and client on Ubuntu. In browser it works, but sqlapi says: libnnz10.so: cannot open shared object file: No such file or directory DBMS API Library 'libclntsh.so' loading fails This library is a part of DBMS client installation, not SQLAPI++ Make sure DBMS client is installed and this required library is available for dynamic loading Linux/Unix: 1) The directories in the user's LD_LIBRARY_PATH environment variable 2) The list of libraries cached in /etc/ld.so.cache 3) /usr/lib, followed by /lib There are both of these files depp inside /usr/lib. I have tried a lot of ways to say eclipse path to this folder, but nothing works. Thanks for help.

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  • Alternatives to PropertyInfo.GetValue() for Mono?

    - by Trilok
    I have a method that has the following signature: private object GetNestedObject<y>(y objToAccess, string nestedObjectName) I'm using Reflection to get the nestedObject from the objToAccess and return it. This works well except it's really slow (I have to do this a few hundred thousand times). I came across HyperDescriptor, but since I'm running this on Linux, and Mono doesn't support TypeDescriptionProviders, I can't use it. Are there any alternatives to using getValue in this case? I could always hardcode in overrides for each type, but that is not desirable and would add a lot of maintenance overhead in my case.

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  • Code generation tool, to create C# adapter classes for unit testing?

    - by RyBolt
    I know I wouldn't need this with Typemock, however, with something like MoQ , I need to use the adapter pattern to enable the creation of mocks via interfaces for code I don't control. For example, TcpClient is a .NET class, so I use adapter pattern to enable mocking of this object, b/c I need an interface of that class. I then produce interface ITcpClient, that can then be implemented via a TcpClientAdapter class, which is just plain vanilla adapter pattern implementation. I am looking for a tool to do this automatically (creation of interface and adapter), I would think there is one out there somewhere? (or is everyone just hand coding these)

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  • Javascript working in Firefox but not in IE -

    - by Summer
    I have this authnav='<li class="last"><a href="auth/login">login</a></li>'+ '<li><a href="auth/create_account">create account</a></li>'; It works fine in Firefox, but Internet Explorer gives me an "Error: Object doesn't support this property or method" I'm mystified - what could be going on here? There's a comment line above the offending line, could that possibly be making a difference? //authnav='<li class="last"><a href="auth/login">login</a></li>'; Check out the page yourself at http://www.imagineelection.com. I want two little links, "login" and "create account", to appear on the top right of the page. Thanks!

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