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• How to detect a pending JDO transaction?

  - by Stevko

  I believe I am getting JDO commit Exceptions due to the transactions nesting although I'm not sure. Will this detect the situation where I am starting a transaction when another is pending? PersistenceManager pm = PersistenceManagerFactory.get().getPersistenceManager(); assert pm.currentTransaction().isActive() == false : "arrrgh"; pm.currentTransaction().begin(); Is there a better or more reliable way?

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• help optimize sql query

  - by msony

  I have tracking table tbl_track with id, session_id, created_date fields I need count unique session_id for one day here what i got: select count(0) from ( select distinct session_id from tbl_track where created_date between getdate()-1 and getdate() group by session_id )tbl im feeling that it could be better solution for it

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• NHibernate : recover session after connection lost

  - by Catalin DICU

  I'm using NHibernate with SQL Server 2005 in a WPF client application. If I manually stop the SQL Server service and then restart it the session doesn't automatically reconnect. So far I'm doing this witch seems to work : try { using (ITransaction transaction = this.Session.BeginTransaction()) { // some select here } }catch(Exception ex) { if(this.Session.Connection.State == ConnectionState.Closed) { try { this.Session.Connection.Open(); } catch (Exception) { } } } Is there a better way ?

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• Should not i use any relative measurement for any element if i need fixed width, pixel perfect desig

  - by metal-gear-solid

  Should not i use any relative measurement in css for any element if i need fixed width, pixel perfect design? would it be better to use px always? How to get pixel perfect design using relative measurement?

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• How do I disable auto-compilation of Scala source in jEdit?

  - by Daniel

  I have always liked the auto-compilation feature of jEdit with Scala sources. Now, however, I'm using "mvn scala:cc" and JavaRebel with a Lift project, which provides better compilation than what jEdit does, and I'd like to disable jEdit's auto-compilation. How do I disable auto-compilation in jEdit, of Scala sources, in particular?

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• Alternative to dotNetInstaller for chaining MSI's?

  - by Rob Ferno

  Is there a better alternative to dotNetInstaller for chaining MSI's, MSU's and EXE files? In other words a bootstrapper. dotNetInstaller is terrible in quiet mode with no options/documentation on what parameters to pass when a component install fails etc (e.g Continue Yes/No)

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• Which GCC warning must be disabled?

  - by SebastianK

  Using GCC 3.3.6, I get the following warning: choosing ... over ... because conversion sequence for the argument is better. Now, I want to disable this warning as described in gcc warning options by providing an argument like -Wno-theNameOfTheWarning But I don't know the name of the warning. How can I find out the name of the option that disables this warning?

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• Is frozenset adequate for caching of symmetric input data in a python dict?

  - by Debilski

  The title more or less says it all: I have a function which takes symmetric input in two arguments, e.g. something like def f(a1, a2): return heavy_stuff(abs(a1 - a2)) Now, I want to introduce some caching method. Would it be correct / pythonic / reasonably efficient to do something like this: cache = {} def g(a1, a2): return cache.setdefault(frozenset((tuple(a1), tuple(a2))), f(a1, a2)) Or would there be some better way?

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• What's the easiest way to add a comment for a particular Revision in SVN?

  - by Clay Nichols

  I'd like to be able to comment on a particular Revision in SVN (using TortoiseSVN). The only way I can see to add a comment (like Release Version X.y) that would be visible in the Revision Graph of all files is with a Tag but that seems like more of a way to Branch the code (and that's not why I want to label it). Is there a better way to do that?

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• Understanding Ruby class vs instance methods

  - by randombits

  I have the following code: #!/usr/bin/ruby class Person def self.speak p = self.new puts "Hello" p.chatter end private def chatter puts "Chattering" end end p = Person.new Person.speak I'd like to make chatter private, accessible only within p.. but I want p to be able to access it within the class method. Is there a better way to design this so chatter isn't available to the public, but a "factory" method like self.speak can call chatter?

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• which is the most accurate way to check variables type javascript

  - by mck89

  Hi, i need to check the type of a variable in javascript, i know 3 ways to do it: instanceof operator: if(a instanceof Function) typeof operator: if(typeof a=="function" toString method (jQuery uses this): Object.prototype.toString.call(a) == "[object Function]" Which is the most accurate way to do type checking beetween these solutions? and why? Please don't tell me that the last solution is better only because jQuery uses that.

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• Smooth scrolling and syntax highlighting in MacVim

  - by mitjak

  Is there any way to get MacVim to scroll more smoothly TextMate style? While I'm here, is there a syntax file I can edit to add syntax highlighting to files? I have Velocity .vhtml files which are largely regular HTML with a bit of VTL thrown in. If I could just add .vhtml as an extension to the HTML syntax highlighter that would already make things 10x better.

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• jQuery and function scope

  - by Jason

  Is this: ($.fn.myFunc = function() { var Dennis = function() { /*code */ } $('#Element').click(Dennis); })(); equivalent to: ($.fn.myFunc = function() { $('#Element').click(function() { /*code */ }); })(); If not, can someone please explain the difference, and suggest the better route to take for both performance, function reuse and clarity of reading. Thanks!

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• Processing image data in java me

  - by Trimack

  Hi, I want to process raw data from a picture taken in java me with byte[] snap = videoControl.getSnapshot(encoding); My question is, whether I should try working already with snap or should I first create the image from this array Image im = Image.createImage(snap, 0, snap.length); and then work with that? Or is there some better documentation of both methods, i.e. getSnapshot and createImage than the Java API reference?

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• ASP.NET spellchecker - Multi language

  - by Srikanth

  I am looking at various options to implement a spellchecker in our ASP.NET 3.5 application. This applicaition is to be used worldwide so a wide language support is important. Can you guys suggest the best possible controls for this purpose? Currently, we are evaluating Obout and Telerik suites. Are there better alternatives, given that spellcheck is our primary goal? thanks

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• Android & Eclipse 2 different versions of the same app.

  - by nathan

  Hello I am a beginning android developer using windows and the eclipse IDE to develop java android applications.I have published one game but there is a free version of the game and a paid version. The google market insists that the different versions must have different package names. So far i have been refactoring the package with 2 different names and changing the R resource file import each time i build the different versions. The code is 99% the same for both versions.Is there a better way?

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• Convert SQL server datetime fields to compare date parts only, with indexed lookups

  - by Caveatrob

  I've been doing a convert(varchar,datefield,112) on each date field that I'm using in 'between' queries in SQL server to ensure that I'm only accounting for dates and not missing any based on the time part of datetime fields. Now, I'm hearing that the converts aren't indexable and that there are better methods, in SQL Server 2005, to compare the date part of datetimes in a query to determine if dates fall in a range. What is the optimal, indexable, method of doing something like this: select * from appointments where appointmentDate='08-01-2008' and appointmentDate<'08-15-2008'

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• Mssql dilemma, performance

  - by Woland

  Hello I am creating app where user can save options witch one is better? 1) to save into user table varchar feeld smthing like ('1,23,4354,34,3') query for this is select * from data where CHARINDEX ( 'L', Providers , 0 ) 0 2) create other table where user options are and just add rows select * from data where Providers in (select Providers from userdata where userid=100) thanks for help

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• html: embed streaming video (crossbrowser)

  - by Fuxi

  hi all, i'm trying to embed a .wmv video into my website but doesnt work :( i've googled and tried <embed> and <video> the video i'm using was created by super converter and i've used WMV7 as video codec. is there a crossbrowser solution for it - or should i better use flash video? thx in advance

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• How do I call a basic YUI3 function from within a normal JavaScript function?

  - by Justin Tanner

  I'd like to call a simple YUI3 function from within a JavaScript function. Here is some code that does what I want in a very verbose way: function changeContent (message) { YUI().use("node", function(Y) { Y.all('#content-div').setContent(message); }); } Is there a better way to do this? NOTE: I don't want to attach this function to any event, I just want a global changeContent() function available.

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• What is the best practice of using return keyword?

  - by Artic

  What is the best practice of using return keyword? If i need to return something from method which pattern is better to use? public boolean method(){ if (case1){ return true; } if (case 2){ return false; } return false; } or public boolean method(){ boolean result = false; if (case1){ result = true; } if (case 2){ result = false; } return result; }

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• Ruby: How can I have a Hash take multiple keys?

  - by zxcvbnm

  I'm taking 5 strings (protocol, source IP and port, destination IP and port) and using them to store some values in a hash. The problem is that if the IPs or ports are switched between source and destination, the key is supposed to be the same. If I was doing this in C#/Java/whatever I'd have to create a new class and overwrite the hashcode()/equals() methods, but that seems error prone from the little I've read about it and I was wondering if there would be a better alternative here.

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• Stack and Queue, Why?

  - by Alon

  Why and when should I use stack or queue data structures instead of arrays/lists? Can you please show an example for a state thats it'll be better if you'll use stack or queue? Thanks.

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• Python IDE on Linux Console

  - by Henrik P. Hessel

  This may sound strange, but I need a better way to build python scripts than opening a file with nano/vi, change something, quit the editor, and type in python script.py, over and over again. I need to build the script on a webserver without any gui. Any ideas how can I improve my workflow?

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• Best way to make suggestion box in an iPhone App

  - by Sam Jarman

  Hey Guys Im thinking about making a suggestion box for my next iPhone app. Whats the best way to go about this? I was thinking an ModalViewController, a text box that emails out? Are there any other(better ways) to do it? Any expertise would be appreciated Cheers Sam

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