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• Are Hibernate named HQL queries (in annotations) optimised?

  - by Graham Lea

  A new colleague has just suggested using named HQL queries in Hibernate with annotations (i.e. @NamedQuery) instead of embedding HQL in our XxxxRepository classes. What I'd like to know is whether using the annotation provides any advantage except for centralising quueries? In particular, is there some performances gain, for instance because the query is only parsed once when the class is loaded rather than every time the Repository method is executed?

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• Bad method names and what it says about code structure.

  - by maxfridbe

  (Apologies in advance if this is a re-post but I didn't find similar posts) What bad method name patterns have you seen in code and what did it tell you about the code. For instance, I keep seeing: public void preform___X___IfNecessary(...); I believe that this is bad because the operation X has an inversion of conditions. Note that this is a public method because classes methods might legitimately require private helpers like this

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• Multithreading in .NET 4

  - by Artiom Chilaru

  I have heard that the .NET 4 team has added new classes in the framework that make working with threads better and easier. Basically the question is what are the new ways to run multithreaded tasks added in .NET 4 and what are they designed to be used for?

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• subset a data.frame with multiple conditions

  - by pslice

  Suppose my data looks like this: 2372 Kansas KS2000111 HUMBOLDT, CITY OF ATRAZINE 1.3 05/07/2006 9104 Kansas KS2000111 HUMBOLDT, CITY OF ATRAZINE 0.34 07/23/2006 9212 Kansas KS2000111 HUMBOLDT, CITY OF ATRAZINE 0.33 02/11/2007 2094 Kansas KS2000111 HUMBOLDT, CITY OF ATRAZINE 1.4 05/06/2007 16763 Kansas KS2000111 HUMBOLDT, CITY OF ATRAZINE 0.61 05/11/2009 1076 Kansas KS2000111 HUMBOLDT, CITY OF METOLACHLOR 0.48 05/12/2002 1077 Kansas KS2000111 HUMBOLDT, CITY OF METOLACHLOR 0.3 05/07/2006 I want to be able to subset by the Analyte and a partial match on the date(namely I just want the year). I have been trying this, but I know it isn't quite right. data[data$Analyte=="ATRAZINE" & grep("2006",as.character(data$Date)),] Any suggestions?

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• Refactor file copy in Visual Studio?

  - by Sapphire

  Does Visual Studio / Resharper support this? By refactor copy I mean to be able to enter new class name in some dialog, and to have the tool do all the refactoring (renaming) for you. No Copy of ... file names, and no error upon having two classes with same name in the project. Netbeans does this out-of-the-box :(

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• no appropriate default constructor available . (when creating a child class)

  - by numerical25

  I am creating some custom exception classes doing the following class GXException { public: GXException(LPCWSTR pTxt):pReason(pTxt){}; LPCWSTR pReason; }; class GXVideoException : GXException { public: GXVideoException(LPCWSTR pTxt):pReason(pTxt){}; LPCWSTR pReason; }; When I created GXVideoException to extend GXException, I get the following error 1>c:\users\numerical25\desktop\intro todirectx\godfiles\gxrendermanager\gxrendermanager\gxrendermanager\gxexceptions.h(14) : error C2512: 'GXException' : no appropriate default constructor available

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• In ASP.NET MVC (3.0/Razor), do you prefer multiple views, or conditionals within views? Why?

  - by Chad

  For my new web app, I'm debating on using multiple views, or conditionals within views. An example scenario would be showing different info to users who are authenticated vs non-authenticated. This could be handled a couple ways. In the controller, check IsAuthenticated and return a view based on that In the view, check IsAuthenticated and show blocks of info based on that Pros of multiple views: Smaller, less complicated view - next to no logic in the view Pros of single views: less view files to maintain The obvious cons are the opposites of the pros: more files to maintain or more complicated view files. Which do you prefer? Why? Any pros/cons I haven't outlined here? Update: Assume each view uses a layout page and partial views to abstract the obviously repetitive code.

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• In ASP.NET MVC, what is the equivalent of ASP classic's server side includes?

  - by Quakkels

  I have been developing in classic ASP for about 2.5 years and I am trying to update my skill set to include ASP.NET MVC. What is the MVC way of executing SSIs? IE: How can I include a database drawn navigation list in a sidebar? I have been looking into partial views, but they seem to get their content from the controller. As far as I can tell this means that I would need to write each controller to pass the navigation list. Am I thinking along the right lines?

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• Jruby rspec to be run parallely

  - by Priyank

  Hi. Is there something like Spork for Jruby too? We want to parallelize our specs to run faster and pre-load the classes while running the rake task; however we have not been able to do so. Since our project is considerable in size, specs take about 15 minutes to complete and this poses a serious challenge to quick turnaround. Any ideas are more than welcome. Cheers

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• Is restricting attributes to class or properties doable?

  - by Will Marcouiller

  I have two custom attributes defined like so: internal class SchemaAttribute : Attribute { internal SchemaAttribute(string schema) { Schema = schema; } internal string Schema { get; private set; } } internal class AttributeAttribute : Attribute { internal AttributeAttribute(string attribute) { Attribute = attribute; } internal string Attribute { get; private set; } } I would like to restrict the SchemaAttribute to classes, and the AttributeAttribute to properties. Is this doable?

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• I don't know what to call it php/css error tho

  - by s32ialx

  whats going on is everything is loading just fine url is deigned.sytes.net except for the links when i click about us or services or contact they look like there loading but the content in body.tpl doesn't change from default. maybe you can help me with this why the links are not changing. you u want here are the ONLY php files I have made phps files for view perpose's but if you insist on it i will post the require code. designed.sytes.net/index.phps designed.sytes.net/classes/file.class.phps

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• JPA is not good enough

  - by Cristiano Sanchez

  Working in a medium size project during last 4 months - we are using JPA and Spring - I'm quite sure that JPA is not powerfull for projects that requires more than CRUD screen... Query interface is poor, Hibernate doesn't respect JPA spec all the time and lot of times I need to use hibernate classes, annotations and config. What do you guys think about JPA? Is it not good enough?

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• Update panel in Tab Container

  - by Sam_Cogan

  I have a tab container with 5 tabs, each tab contains an update panel. When the user initially opens the form, they can only see the first Tab, the others are set to visible=false. Once they have completed the first form, the hit save which sends a partial postback to save the data to the DB. Once that is saved, I then want to set all the other tabs to visible, however this does not work at the moment, I am assuming because the tab container is not contained in an update panel. How can I get this to work, do I need to put the tab container in it's own update panel, which will obviously then contain all the other update panels, or should I not use an update panel in the first tab and do a full page postback?

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• PHP entension wrapper for C++

  - by Yijinsei

  Hi guys, I am new in this area of writing extension for PHP, however I need to create a wrapper class for C++ to PHP. I am currently using PHP 5.2.13. I read this article http://devzone.zend.com/article/4486-Wrapping-C-Classes-in-a-PHP-Extension, a tutorial on how I could proceed to wrap C++ class to communicate with PHP Zend however it is written to for linux system. Do you guys have any article or advice on how I could proceed to write a wrapper class to communicate with PHP?

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• What area of Mathematics is most useful to general programming knowledge?

  - by chustar

  I need to take elective mathematics classes and I was wondering which ones have been most helpful to programmers on stackoverflow. I'm interested in taking topology because of http://abstrusegoose.com/254 but was wondering what would be helpful to know as far as (general purpose) programming goes.

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• get url of all tabs in a firefox window (if posssible all ff windows)

  - by encryptor

  I can retrieve the url of current tab in firefox using var wm = Components.classes["@mozilla.org/appshell/window-mediator;1"] .getService(Components.interfaces.nsIWindowMediator); var mainWindow = wm.getMostRecentWindow("navigator:browser"); var tabbrowser = mainWindow.gBrowser; var url = tabbrowser.currentURI.spec; Now i want to do it for all tabs and save it in a string and if possible get it for tabs in the other ff windows as well. How can i do that?

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• COM Dual Interfaces

  - by Tony

  A dual interface in COM is one that is able to be accessed via a DispInterface or via VTable methods. Now can someone tell me what is exactly what the difference is between the two methods? I thought that a VTable is a virtual table which holds the pointers to the different functions when implementing a class hierarchy which has virtual functions that can be overridden in child classes. However I do not see how this is related to a dual interface in COM?

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• Auto Generate Objects in DBIx::Class ORM in Perl

  - by Sam

  Hello, I started learning DBIx::class and I reach the point where you have to create the Objects that represents tables. Should this classes be created manually ( hard coding all the fields and relationships.....) or there is a way to generate them automatically using the database schema. I read something about loaders, but i did not know where they are really used. Please advice. Thanks

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• Lazy resolution of dependency injection

  - by Balaji

  I have .net classes I am using unity as IOC for resolving our dependencies. It tries to load all the dependencies at the beginning. Is there a way (setting) in Unity which allows to load a dependency at runtime?

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• Why doesn't Apple make private APIs inaccessible?

  - by Howiecamp

  If Apple doesn't want developers using private APIs in the iPhone SDK, why don't they do something like mark the classes and/or methods with whatever the Objective-C equivalent of C#'s "internal" keyword? If the APIs are spread amongst multiple binaries, Apple could refactor them into dedicated private-API-only binaries to make this easier for them.

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• Best way to set-up an iPhone project?

  - by wgpubs

  Looking for the best way to set-up an iPhone project in XCode ... namely: What is the preferred project template to start with (e.g View-Based or Windows-Based application)? What folder structure should I create in XCode to manage the project? For example, under "Classes" is it a preferred practice to add Models, Views and Controllers sub-folders? Any other best practices, tips, etc... would be appreciated. Thanks

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• Rails - asynchronous tasks, forked processes, best practices

  - by LisaPatton

  I'm using a Observer on my classes. When one of the records is created/updated I need to notfify another service (via a URL call). What is the best way to do this to avoid slowing down my class? Would using a gem liked delayed_job be overkill? In my Observer's after_update() / after_create() I just want to launch a thread that calls the URL...

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• Performance of SHA-1 Checksum from Android 2.2 to 2.3 and Higher

  - by sbrichards

  In testing the performance of: package com.srichards.sha; import android.app.Activity; import android.os.Bundle; import android.widget.TextView; import java.io.IOException; import java.io.InputStream; import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; import java.util.zip.ZipEntry; import java.util.zip.ZipFile; import com.srichards.sha.R; public class SHAHashActivity extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); TextView tv = new TextView(this); String shaVal = this.getString(R.string.sha); long systimeBefore = System.currentTimeMillis(); String result = shaCheck(shaVal); long systimeResult = System.currentTimeMillis() - systimeBefore; tv.setText("\nRunTime: " + systimeResult + "\nHas been modified? | Hash Value: " + result); setContentView(tv); } public String shaCheck(String shaVal){ try{ String resultant = "null"; MessageDigest digest = MessageDigest.getInstance("SHA1"); ZipFile zf = null; try { zf = new ZipFile("/data/app/com.blah.android-1.apk"); // /data/app/com.blah.android-2.apk } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } ZipEntry ze = zf.getEntry("classes.dex"); InputStream file = zf.getInputStream(ze); byte[] dataBytes = new byte[32768]; //65536 32768 int nread = 0; while ((nread = file.read(dataBytes)) != -1) { digest.update(dataBytes, 0, nread); } byte [] rbytes = digest.digest(); StringBuffer sb = new StringBuffer(""); for (int i = 0; i< rbytes.length; i++) { sb.append(Integer.toString((rbytes[i] & 0xff) + 0x100, 16).substring(1)); } if (shaVal.equals(sb.toString())) { resultant = ("\nFalse : " + "\nFound:\n" + sb.toString() + "|" + "\nHave:\n" + shaVal); } else { resultant = ("\nTrue : " + "\nFound:\n" + sb.toString() + "|" + "\nHave:\n" + shaVal); } return resultant; } catch (IOException e) { e.printStackTrace(); } catch (NoSuchAlgorithmException e) { e.printStackTrace(); } return null; } } On a 2.2 Device I get average runtime of ~350ms, while on newer devices I get runtimes of 26-50ms which is substantially lower. I'm keeping in mind these devices are newer and have better hardware but am also wondering if the platform and the implementation affect performance much and if there is anything that could reduce runtimes on 2.2 devices. Note, the classes.dex of the .apk being accessed is roughly 4MB. Thanks!

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• Scala capture group using regex

  - by Geo

  Let's say I have this code: val string = "one493two483three" val pattern = """two(\d+)three""".r pattern.findAllIn(string).foreach(println) I expected findAllIn to only return 483, but instead, it returned two483three. I know I could use unapply to extract only that part, but I'd have to have a pattern for the entire string, something like: val pattern = """one.*two(\d+)three""".r val pattern(aMatch) = string println(aMatch) // prints 483 Is there another way of achieving this, without using the classes from java.util directly, and without using unapply?

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• In which scenario it is useful to use Disassembly on python?

  - by systempuntoout

  The dis module can be effectively used to disassemble Python methods, functions and classes into low-level interpreter instructions. I know that dis information can be used for: 1. Find race condition in programs that use threads 2. Find possible optimizations From your experience, do you know any other scenarios where Disassembly Python feature could be useful?

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