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• When is ( and isn' t ) recommended a Documente Oriented DB ( like mongodb or couchdb ) ?

  - by xRobot

  I have always used postgresql or mysql but I have heard a lot about document oriented db like mongodb and couchdb... So my question is... When is ( and isn' t ) recommended a Document Oriented DB ( like mongodb or couchdb ) ?

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• Use a different *.config file, depending on IIS application pool .NET version

  - by LeeCambl

  I'm looking or a way to programmatically determine which version of the .NET Framework an application pool is using in IIS, at runtime, and for a website application to then use that information to choose which *.config file it should use. Is it possible? I'm not sure where to begin. Quite a broad question, and I'm open to any method of solving the problem, so fire away! Thanks in advance, you lovely Stack Overflowers!

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• What is the the Ghost Design Pattern?

  - by David Relihan

  Someone recently asked a question about the Ghost Design Pattern - I have not seen this before. What is the Ghost Design Pattern and how is it implemented? I can only find snippets on the web in reference to it.

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• When to Multithread and when not to Multithread c++ applications?

  - by Ashwin

  I have been in an assumption that multithreading gives a lot of flexibility and power to make efficient programs. But I am wrong. Multithreading is sometimes not desirable as it will create serious impact on the way the actual program behaves. My question? I am not sure of when to use and when not to use multithreads in applications. Please update this thread and give your opinions on multithreading and suggestions on its usage scenarios.

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• Do I have to initialize simple class member variables?

  - by Frank

  Quick beginner's question: Do I have to initialize simple class member variables, or are they guaranteed to get assigned their default values in any case? Example: class Foo { int i; // is i==0 or do I need the following line for that? Foo() : i(0) {} }; Thanks!

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• What areas of computer science are particularly relevant to mobile development?

  - by MalcomTucker

  This isn't a platform specific question - rather I'm interested in the general platform independent areas of computer science that are particularly relevant to mobile applications development. For example, things like compression techniques, distributed synchronisation algorithims etc.. what theoretical concepts have you found relevant, useful or enabling when building mobile apps?

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• PHP Variable Variable inside []'s

  - by Homer_J

  Hi all, I hope there is a simple solution! I have a variable: $results['q1']; Is it possible to have the 'q1' element as a variable, something like this: $results['$i[question]']; Have not been able to find a solution on Google and researching the PHP manuals... Anyone got a suggestion/ solution? Thanks, Homer.

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• VB script + replace word only in specific line

  - by yael

  hi I find way to replace word in text file as the following strNewText = Replace(strText, "OLD_WORD", "NEW_WORD")t but this replace every OLD_WORD in the file my question is if it possible to replace the OLD_WORD with the NEW_WORD only on specific line for example I want to replace only on line that start with "THIS_LOCATION" THIS_LOCATION=OLD_WORD THX for help

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• replace new lines with comas in shell

  - by mpapis

  I want to replace new lines in text with coma or space but do not change the last new line. I know of this question: How to replace new lines with tab characters - but it does produce an tab on end instead of new line. So far I have come with: awk 'NR>1{printf","} {printf $1} END{printf"\n"}' Is there an easier way to do this? This is not an assignment, I am just curious want to level up my scripting.

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• pygtk combobox 'changed' does not work

  - by joven

  I'm using pygtk then i used gtk.Combobox when i try to connect on chenged event its working but when i try to select an item that is already selected the changed method does not triggered since the selection does not changed.. so my question is how to connect the changed event even thought the selection does not changed tnx in advance

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• msdxm.ocx and duration issues

  - by greendaale

  This is a VB6 question. How does Windows Media Player compute duration? Is it possible to detect corrupt media files and do not compute duration on these? I sometimes get duration = 0, why does that happen? Thanks :)

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• What's wrong with this code? [closed]

  - by NHans

  Could you please kind enough me to clarify this question as soon as possible? pow(X.0,1). pow(X,Y,Z):-Y1=Y-1,pow(X,Y1,Z1),Z1=Z*X.

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• In C#, is there any difference in how to raise a event? (Use SomeEvent(arg) or SomeEvent.Invoke(arg

  - by LLS

  The question is just the simple one: Is there any difference in using SomeEvent(arg); and SomeEvent.Invoke(arg); If there is no significant difference, which one is the better practice? Thanks

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• which text writing classes are the most efficient for writing lots of small files?

  - by Robert H

  I have to write 300+ files to a server share on a hourly basis. A quick implementation using CreateText takes approximately 1.4 seconds per file. I know there is a better way to do this, but I am unsure which way is actually the quickest/most efficient; hence my question: Which text writing class is the most efficient for writing hundreds of small files ( 336 bytes on average ) to a server share?

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• Removing an associated object with a link_to to the update action

  - by Numbers

  class Question < ActiveRecord::Base belongs_to :category end class Category < ActiveRecord::Base has_many :questions accepts_nested_attributes_for :questions, allow_destroy: true end CategoriesController: private def category_params params.require(:category).permit(:title, questions_attributes: [:id, :category_id, :title, :_destroy]) end In the view I have a category displaying all it's posts (CategoriesController#show). Each post is deletable. How could I construct a link_to helper that deletes a post by updating the category?

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• What components have you built that you are reusing over and over again for your desktop application

  - by Jason

  We are building our internal library of components up, and was wondering what everybody has in their library of reusable components for your organization, for desktop applications. Our list currently includes only a couple of components: Logon, Security and User Group functionality System Tray / Service Framework Component for Internet Communications (to handle proxies, security, etc...) Billing What else do you have, that we should add to our list? If you have reusable web components, save your answers... I will open a different question if this one is successful.

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• how to use winsock to create an ftp for file transfer?

  - by moon

  it is my third question for ftp file transfer between to machine where one machine has a shared folder and i have to access that folder from my machine using ansi-c or can use a third party lib for this purpose, i am stuck here help required.........................

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• DisplayFor ignores metadata

  - by Juvaly

  For my Contact class, the property EmailAddress is marked with the [DataType(DataType.EmailAddress)] attribute. In my view, using Html.Display("EmailAddress") and Html.DisplayFor(c => c.EmailAddress) yields different results. The former outputs a mailto: link, which is the expected behavior, while the latter simply outputs the email address as plain text. My question is why the different behavior, I expected these two methods to have the same output.

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• Printf example in bash does not create a newline

  - by WolfHumble

  Working with printf in a bash script, adding no spaces after "\n" does not create a newline, whereas adding a space creates a newline, e. g.: No space after "\n" NewLine=`printf "\n"` echo -e "Firstline${NewLine}Lastline" Result: FirstlineLastline Space after "\n " NewLine=`printf "\n "` echo -e "Firstline${NewLine}Lastline" Result: Firstline Lastline Question: Why doesn't 1. create the following result: Firstline Lastline I know that this specific issue could have been worked around using other techniques, but I want to focus on why 1. does not work.

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• Rails, ActiveRecord, how to find foreign rows that are NOT there?

  - by randombits

  The title is a bit difficult to put together for this question. Say I have two models, Foo and Bar. Foo has many Bar's. Bar belongs to one Foo. How do I use Foo.find to find all of the Foos that currently have zero Bars? In SQL this would translate into something like: SELECT * from foo where id NOT IN (select foo_id from bar);

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• What do you do when a client ask for a feature which is a really bad idea?

  - by TAG

  Recently there was a SO question asking how to implement a feature which blocked users from copying text from a page in their browser. There were many negative comments on this feature, both because it's not practically possible to implement effectively and because it will interfere with the users' experience? What's a programmer to do in these sorts of situations in dealing with their clients or employers?

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• Running 2 threads simultaneously

  - by lamsaitat

  In the case of an IM client. I have made 2 separate threads to handle sending packets (by std io) and receiving packets. The question is how to make these 2 threads run simultaneously so that I can keep prompting for input while at the same time be ready to receive packets at any time? I have already tried setting a timer but the data is always lost receiving.

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• How to guard against memory leaks?

  - by just_wes

  I was recently interviewing for a C++ position, and I was asked how I guard against creating memory leaks. I know I didn't give a satisfactory answer to that question, so I'm throwing it to you guys. What are the best ways to guard against memory leaks? Thanks!

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• PHP: What's the best way to check equality of $_SERVER['HTTP_REFERER'] ?

  - by Hank

  I have a PHP script that checks the HTTP Referer. if ($_SERVER['HTTP_REFERER'] == 'http://www.example.com/') {...} However, this seems inherintly unsafe ... because what happens if the user goes to 'http://example.com/' or 'http://www.ExaMple.com' (both of which don't match the equality test). Question: what's a better equality test to ensure that the HTTP Referer is coming from 'example.com' ?

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• efficient algorithm to test whether a given number is part of the fibonnaci sequence

  - by blueberryfields

  Given the number X, is it a fibonnaci number? Any source code or mathematical formula would be ok. Yes, it looks like this is a duplicate of (this question). How does stack overflow deal with duplicates?

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