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• What is a good metaphor for c memory management?

  - by fsmc

  I'm trying to find a good metaphor to explain memory allocation, initialization and freeing in c to a non technical audience. I've heard pass-by-reference/value talked about quite well with postal service usage, but not so much for allocation/deallocation. So for I've thought about using the idea of renting a space might work, but I wonder if the SO crew can provide something better.

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• What happened to the CSS Checker tool?

  - by Kyle Sevenoaks

  I used it before, and was reminded of it when someone asked about a tool to strip unsused CSS from a stylsheet. I went back to the link, but it's gone, what happened to it? Is it gone forever or does anyone know of a backup? Or a similar tool that can still check your CSS against the HTML and strip orphan CSS. Thanks. Link (to broken site for reference).

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• how can I get around no arrays as class constants in php?

  - by user151841

  I have a class with a static method. There is an array to check that a string argument passed is a member of a set. But, with the static method, I can't reference the class property in an uninstantiated class, nor can I have an array as a class constant. I suppose I could hard code the array in the static method, but then if I need to change it, I'd have to remember to change it in two places. I'd like to avoid this.

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• Looking for a Python IDE with good support for libraries (Twisted).

  - by Omega

  I'm looking for a Python IDE that can help me easily locate and manage and use the libraries on my system (Ubuntu). Specifically Twisted. Code completion is important including the symbols I import. (I've so far had a look at PyDev as well as OpenKomodo, but while both offer code completion for default Python concepts, I wasn't able to get either to import Twisted into my project and was thus getting reference errors.) Usual disclaimer: I don't like EMACS or vi, please, nothing regarding those.

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• Modular programming in C++

  - by Supriyo

  I want to know how modular programs are written in C++ i.e. how they are analysed, designed etc. Also names of reference books will be helpful.

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• How can I declare constant strings for use in both an unmanaged C++ dll and in a C# application?

  - by Surfbutler

  Curently I'm passing my const string values up from my C++ into my C# at startup via a callback, but I'm wondering if there's a way of defining them in a C++ header file that I can then also refer to in C#. I already do this with enums as they are easy. I include a file in both my C++ library project (via a .h file with a pragma once at the top), and my C# application (as a link): #if _NET public #endif enum ETestData { First, Second }; I know it sounds messy, but it works :) But...how can I do the same with string constants - I'm initially thinking the syntax is too different between the platforms, but maybe there's a way? Using clever syntax involving #if _NET, #defines etc? Using resource files? Using a C++/CLI library? Any ideas?

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• Where the Stack variable stores ( Data segment or Heap or BSS) ?

  - by SIVA

  Some people are saying " stack variable store its value in HEAP ", and others saying " stack variable store store its value in DATA segment". I am totally confused with these conflict answers. Where exactly static variable stores?. I am expecting an answer with standard reference ( text books, or good author tutorial).

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• How to get total number of potential results in Lucene

  - by Slace

  I'm using lucene on a site of mine and I want to show the total result count from a query, for example: Showing results x to y of z But I can't find any method which will return me the total number of potential results. I can only seem to find methods which you have to specify the number of results you want, and since I only want 10 per page it seems logical to pass in 10 as the number of results. Or am I doing this wrong, should I be passing in say 1000 and then just taking the 10 in the range that I require?

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• SQL Server. Stored procedure to get the biweekly periods

  - by Yada

  I'm currently trying to write a stored procedure that can compute the biweekly periods when a date is passed in as a parameter. The business logic: the first Monday of the year is first day of the biweekly period. For example in 2010: period period_start period_end 1 2010-01-04 2010-01-17 2 2010-01-18 2010-01-31 3 2010-02-01 2010-02-14 .... 26 2010-12-20 2011-01-02 Passing today's date of 2010-12-31 will return 26, 2010-12-20 and 2011-01-02. I'm not too strong in T-SQL. Any help is appreciated. Thanks

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• Making linq avoid using in memory filtering where possible

  - by linqmonkey

  Consider the these two LINQ2SQL data retrieval methods. The first creates a 'proper' SQL statement that filters the data, but requires passing the data context into the method. The second has a nicer syntax but loads the entire list of that accounts projects, then does in memory filtering. Is there any way to preserve the syntax of the second method but with the performance advantage of the first? public partial class Account { public IQueryable<Project> GetProjectsByYear(LinqDataContext context, int year) { return context.Projects.Where(p => p.AccountID==this.AccountID && p.Year==year).OrderBy(p => p.ProjectNo) } public IQueryable<Project> GetProjectsByYear(int year) { return this.Projects.Where(p => p.Year==year).OrderBy(p => p.ProjectNo).AsQueryable() } }

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• Tracking Ip address and country name(asp.net)?

  - by Surya sasidhar

  hi, Yesterday i saw a site in which, site is listing the ip address and country name, saying that recently visited members (a list of ip address with country name,city name). Can i know how can i track that information any reference or any code. Thank You.

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• XML allows for external entities; what about XHTML?

  - by xtofl

  This question about web page 'inclusion' triggered my curiosity. The XML allows you to specify a reference to an 'external' portion. Can you do the same in XHTML, then? XML example: <!ENTITY foo SYSTEM "http://www.mydomain.com/logo.gif" NDATA GIF87A> ... <SOMETHING>&foo;</SOMETHING>

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• Is it bad practice to not assign a new object to a variable?

  - by Jeff

  Is it bad javascript practice to not assign a newly created object to a variable if you're never going to access it? For example: for(var i=0;i<links.length;i++){ new objectName(links[i]); } And again, I won't be accessing it, so there's no need for a variable to reference it.

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• Answered: Selecting even table rows from a table element

  - by mvrak

  The issue I am having is: How do I go from a variable pointing at an element to using CSS selectors? I want to make this work: function highlight(table) {$(table " > :even").toggleClass('highlight');} where table is a reference to a table element. I don't want answers that tell me to use $('#table') because that defeats the point of the generality I am trying to make. Thanks

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• Iterating through struct fieldnames in MATLAB.

  - by Noio

  My question is easily summarized as: "Why does the following not work?" teststruct = struct('a',3,'b',5,'c',9) fields = fieldnames(teststruct) for i=1:numel(fns) fns(i) teststruct.(fns(i)) end output: ans = 'a' ??? Argument to dynamic structure reference must evaluate to a valid field name. Especially since teststruct.('a') does work. And fns(i) prints out ans = 'a'. I can't get my head around it.

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• Fastest method for SQL Server inserts, updates, selects

  - by Ian

  I use SPs and this isn't an SP vs code-behind "Build your SQL command" question. I'm looking for a high-throughput method for a backend app that handles many small transactions. I use SQLDataReader for most of the returns since forward only works in most cases for me. I've seen it done many ways, and used most of them myself. Methods that define and accept the stored procedure parameters as parameters themselves and build using cmd.Parameters.Add (with or without specifying the DB value type and/or length) Assembling your SP params and their values into an array or hashtable, then passing to a more abstract method that parses the collection and then runs cmd.Parameters.Add Classes that represent tables, initializing the class upon need, setting the public properties that represent the table fields, and calling methods like Save, Load, etc I'm sure there are others I've seen but can't think of at the moment as well. I'm open to all suggestions.

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• Error 401 when login twitter by twitter4j

  - by user1060362

  I am doing an app android to login and upload photo to twitter. I used twitter4j to login and reference some tutorial..I extract that consumer key and consumer secret key are filled correct.But I encountered an error"401: Authentication credential...".Have a solution to fix it is sync time my server with time twitter server..But I don't understand what sync time here and how to extractly.. Can you help me.

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• Will this be garbage collected in JVM?

  - by stjowa

  I am running the following code every two minutes via a Timer: object = new Object(this); Potentially, this is a lot of objects being created and a lot of objects being overwritten. Do the overwritten objects get garbage collected, even with a reference to itself being used in the newly created object? I am using JDK 1.6.0_13. Thanks for the help.

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• Extended MAPI: How to get the entry ID of messages moved by CopyMessages

  - by marijne

  I have found that if I move a message using IMAPIFolder::CopyMessages (using the MESSAGE_MOVE flag) the message gets a new entry ID. However I do not see any reliable way of getting the entry ID of the message in its new location, or otherwise getting a reference to it. The best suggestion I have had so far involves tagging the message with the old custom property before moving, and then doing a search afterwards, but I was wondering if there is a less convoluted solution.

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• Why must initialization value of field members be determinable at compile time?

  - by flockofcode

  1) Why must initialization value of field members be determinable at compile time? 2) But if the initialization value needs to be determined at compile time, then why am I able to initialize a A.b field using a reference to an object: class A { B b = new B(); } class B {} Thank you

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• Call function based off of a string in Lisp

  - by powerj1984

  I am passing in command line arguments to my Lisp program and they are formatted like this when they hit my main function: ("1 1 1" "dot" "2 2 2") I have a dot function and would like to call it directly from the argument, but this isn't possible because something like (funcall (second args)...) receives "dot" and not dot as the function name. I tried variations of this function: (defun remove-quotes (s) (setf (aref s 0) '"")) to no avail, before realizing that the quotes were not really a part of the string. Is there a simple way to do this, or should I just check each string and then call the appropriate function? Thanks!

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• Does the iPhone 3G/3Gs camera put metadata in its images? (and how do you get it?)

  - by Ben Collins

  I've been trying to figure how whether the iPhone (either 3G or 3Gs) camera puts metadata into it's images. Anecdotally, it appears that it does (e.g., I've seen images posted on the web that included a bunch of metadata), but I can't find reference to it anywhere in the SDK documentation. So....does anyone have a definitive answer? Also, if there is metadata, how do I get at it?

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• Get params value from component Joomla 3.0

  - by yogeshK

  I have saved value like this in my component table fields params. unique=1 default_value=Default validate=Validate validate_error_msg=Validate error messag searchable=1 Now i want to get value in my component.So I am passing values in my component's view.html.php in this way $params = new JForm($row->params); but its not working. Now I want to get value so I am taking like this $this->params->getValue('default_value'); But its not work where as in Joomla 2.5 ,we can get value like this $this->params->get('default_value');

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• how can i change texts in the dynamic textFields in SimpleButton instance (button symbol)?

  - by sasi

  hi every one, this may be a basic thing, but i couldn't find an answer by serching internet. I have created a simple button - Istance name = "btnsample" and there are two layers layer 0- button design with rollovers - layer 1- dynamic text field - instance name = "txtbtnlabel" btnsample.txtbtnlabel.text = "new button label; but it's giving followin error :-119:Access of possible undefined propety txtbtnlabel through a reference with static type flash.display:simpleButton. how to solve this problem?

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• how to leave a gap in select list from left

  - by Mayur

  Hi All, I m trying to leave a gap from left in select list, but its getting problem in firefox and safari please give me source code or any reference link from where i can work... code which i use : <select style="padding:10px"> <option>Male</option> <option>female</option> <option>other</option> </select> Thanks

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