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• In Mechanize what is the cookiejar and how does it differ from cookies?

  - by Janak

  How does Mechanize::CookieJar differ from the Mechanize::Cookies array? There must be some difference but after poking around for a little bit I can't seem to find a good explanation?

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• SVN Revert - Why so slow

  - by Midhat

  I have the latest version of tortoiseSVN running on a XP box. I ahve notices that revert is the slowest operation for me, although it seems to be the simplest svn operation. is there any logical explanation for tis?

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• SQL explain plan: what is Materialize?

  - by Claudiu

  I asked PostgreSQL to explain my query. Part of the explanation was: table_name --> Materialize What does materialize do? I'm joining two tables, not views or anything like that.

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• Stop browser throbber spinning for Comet using iframe

  - by Shanison

  When I use comet using iframe push, the browser throbber will keep spinning forever while the data is being pushed through the iframe. Lightstreamer is also using iframe, but how do they manage to make it stop? I found a similar post here but it doesn't seem to solve my problem. Any explanation on how lightstreamer works would greatly appreciately. Thank you.

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• How does a hash table work?

  - by Arec Barrwin

  I'm looking for an explanation of how a hashtable works - in plain English for a simpleton like me! For example I know it takes the key, calculates the hash (how?) and then performs some kind of modulo to work out where it lies in the array that the value is stored, but that's where my knowledge stops. Could anyone clarify the process. Edit: I'm not looking specifically about how hashcodes are calculated, but a general overview of how a hashtable works.

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• Visual Studio 'SQL Server 2008 Server Project' vs. 'Sql Server 2008 Database project' ?

  - by user193189

  I can't see to find a quick explanation of the differences so I can figure out which to use. One is for a server one is for a Database? Im not sure what that means.. Basically we are doing a new web app and I want to see what these project types can offer me in terms of tracking the DB code/schema etc..

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• Upload image in folder in cakephp

  - by manish

  Hello sir, I want to upload image in particular folder,may be this be in webroot/img. how i have to do this,if any one have code please help with proper explanation. Thanks Manish

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• Training sets for AdaBoost algorithm

  - by palau1

  How do you find the negative and positive training data sets of Haar features for the AdaBoost algorithm? So say you have a certain type of blob that you want to locate in an image and there are several of them in your entire array - how do you go about training it? I'd appreciate a nontechnical explanation as much as possible. I'm new to this. Thanks.

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• Anagram of a word

  - by Codenotguru

  How to print anagrams of a word from a dictionary? how to optimize it if we have to do this repeatedly?? is there any java code explanation ??

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• What is the relationship between UIView's setNeedsLayout, layoutIfNeeded and layoutSubviews?

  - by Tarfa

  Hi all. Can anyone give a definitive explanation on the relationship between UIView's setNeedsLayout, layoutIfNeeded and layoutSubviews methods? And an example implementation where all three would be used. Thanks.

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• Dialup modem transmission protocols and reates (client and server)

  - by deb

  Hello, Does anybody know why when connecting two dial-up modems the maximum protocol you can use to stablish the communication is V.34 -33.6K? I've read that you can connect with the server modems of the ISP using V.92 or V.90 and I would like to know if there is any explanation to this. Thanks in advance.

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• Why does a JRuby application on App Engine take so long to start?

  - by Major Tom

  I'm considering using JRuby on App Engine but have heard that Juby app on App Engine have a long startup lag. Why is this? Is it because the JRuby jar files are so large that a cold startup requires them to be loaded into memory before the app can start serving? That would be my guess but I'm not sure if that's a precise technical explanation.

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• WPF - Sample App, Step by Step

  - by Randy Minder

  I'm new to WPF development. Is anyone aware of a site or resource that builds a somewhat simple WPF application step by step, with ample explanation and/or documentation?

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• Software architectures, changes over time?

  - by Vimvq1987

  I want to list software architectures from which were used in history to which are using now. As far as I know, they're client-server, cloud-computing,...But I cannot get a full list of them. Can you please give me this: Software architecture, years active, architecture that replaced it and the reason of replacement. A little detailed explanation will be much appreciated. Thank you so much.

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• Curiosity beyond abstractions: how is bytecode executed? how do device drivers work?

  - by Yktula

  Everything I've seen on *nix has been a set of abstractions off hardware, but I'm curious as to how the hardware works. I've programmed in assembly, but that's still only a set of abstractions. How does a processor understand assembly opcodes (as bytecode)? How do device drivers work (with an explanation at a lower level (of abstraction))?

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• 35000 ft. Overview of Software Technologies

  - by Manav Sharma

  Friends! Can someone point me to an explanation (subjective/ map) which untangles the complex mesh of technologies which kinda overwhelms a newbie who wants to get an understanding of what fits where in terms of software. Thanks

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• Advantages of using [] over new Array() in JavaScript

  - by Alex

  What are the advantages of using var foo = []; over using var bar = new Array(); i've been told to use [] over new Array() but never with much explanation

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• Practical usage for Delphi's new RTTI - Attributes,Values

  - by John

  Hello, I found great explanation about the new RTTI in Delphi,but I don't understand one important thing about all I have read so far - Where can I use that? What is it supposed to replace? Thanks in advance.

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• What does "bean X is injected into bean Y" mean in context of Spring framework

  - by sergionni

  Hello. Seems,that very basic question. Anyway can't get the meaning of next definition from Spring tutorials - "bean X is injected into bean Y" . Does it mean composition relation between classes(when one bean has reference to another)? Or it's something more? Thank you for answer or reference with explanation.

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• Can you give me Indexing Service example?

  - by Vinod GH

  I have got an application in Asp using Indexing service. I am new to this. Can any body send an example with explanation?

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• PHP: using REGEX to get the tablename from a mysql query

  - by Matt

  Hi Guys, Consider these three mysql statements: select * from Users; select id, title, value from Blogs; select id, feelURL, feelTitle from Feeds where id = 1; Now im not very good at REGEX, but i want to get the table name from the mysql query. Could someone possibly create one for me with a little explanation. Thanks,

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• Download acceleration

  - by Nilks

  I have Google'd my butt off, and I can't find anything on this topic. I am trying to create a download client using Java, and I have figured out how to download files with Java, but I want to accelerate the download speed. I know how this works (opening several connections to the download server), but how can I achieve this? I am looking for either some detailed explanation of such an algorithm or some code examples.

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• Class declaration confusion - name between closing brace and semi-colon

  - by Matt H

  class CRectangle { int x, y; public: void set_values (int,int); int area (void); } rect; In this example, what does 'rect' after the closing brace and between the semi-colon mean in this class definition? I'm having trouble finding a clear explanation. Also: Whatever it is, can you do it for structs too?

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• Difference between background and concurrent garbage collection?

  - by marco.ragogna

  I read that with .NET Framework 4 the current garbage collection implementation is replaced: The .NET Framework 4 provides background garbage collection. This feature replaces concurrent garbage collection in previous versions and provides better performance. At this page there is an explanation how it works but I am not sure I understood it. In practical world application what is the benefit of this new GC implementation? Is it a feature that could be use to push for a transition from 3.5 or previous to 4.0?

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• C# using the question mark after a type, for example: int? myVariable; what is this used for?

  - by GenEric35

  Hi, typically the main use of the question mark is for the conditional, x ? "yes" : "no". But I have seen another use for it but can't find an explanation of this use of the ? operator, for example. public int? myProperty { get; set; }

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