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  • C++ code which is slower than its C equivalent?

    - by user997112
    Are there any aspects to the C++ programming language where the code is known to be slower than the equivalent C language? Obviously this would be excluding the OO features like virtual functions and vtable features etc. I am wondering whether, when you are programming in a latency-critical area (and you aren't worried about OO features) whether you could stick with basic C++ or would C be better?

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  • Foreach/For loop alternative lambda function?

    - by mamu
    We use for or foreach to loop through collections and process each entries. Is there any alternative in all those new lambda functions for collections in C#? Traditional way of doing foreach(var v in vs) { Console.write(v); } Is there anything like? vs.foreach(v => console.write(v))

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  • Can I add Boost source+header files to my own (Open Source) project?

    - by rubenvb
    Is it allowed by the Boost License to just add the source code of the stuff I need to my project (accompanied by the license of course?). I couldn't find any "descriptive" confirmation. I would have seperate Include/boost and Source/boost directories for easy access. PS: Seeing as boost::filesystem is going into C++0x TR2, and lambda's are already in c++0x TR1, I don't see any reason to be juggling with C functions like realpath, getcwd and the like. They don't work well anyways...

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  • getopt implicit declaration in Solaris?

    - by Steven
    In Solaris, gcc gives me implicit declaration of function `getopt' when compiling #include <unistd.h> #include <stdlib.h> int main(int argc, char *argv[]) { getopt(1,argv,""); return 0; } The man page for getopt says something about including unistd.h or stdio.h, however even though I'm inluding both I still get this warning. Is this normal? Is using functions that aren't explicitly declared common in Unix development?

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  • can i perform xml operations in XMLLITE with the same features of MSXML?

    - by Rajakumar
    Hi , I know something about MSXML parser ,to create an xml with native code ..Msxml depends COM..So I want to create xml without com and dom ,so i wish to choose XMLLITE..but i dont know full details about xmllite ,when i was read the xmllite documentation in msdn ,i gathered some points ,they will provide only 2 things (IXMLReader & IxmlWriter).Here in msxml ,i had many functions to do xml operations ,such as selectsinglenode,appendchild ..Now can i perform the same things with XMLLITE?..please give me the right choice towards this ...

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  • TextMate can show definition of a function easily?

    - by Jian Lin
    I am using TextMate on a Ruby on Rails project and wonder if you can put the mouse on link_to, and then press a key and it will show the definition of link_to, or does this for any other helper functions? Or, click open a box and type in a function name and it will show you the definition?

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  • Modify static data members from another process?

    - by cake
    In .Net, is it possible for process A to modify the values of some static data members from process B? When running under the same AppDomain, it's possible to do so via Reflection, but about doing so between different process? (via Reflection also. I'm not looking to use functions such as Win32::ReadProcessMemory)

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  • VB6 code for Reading/Writing Windows Registry values

    - by Clay Nichols
    I'm looking for a good example of reading and writing to the Windows Registry using VB6. Yes, I know there are lots of mediocre examples. I spent an hour googling and testing. Some were incredibly complex, others had only some of the functions, and almost none of it had been vetted in any way (voted on). Since Stack Overflow is intended to the canonical location for answers to programming questions, it seems reasonable to post it here.

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  • Standard library function in R for finding the mode?

    - by Nick
    In statistical language R, mean() and median() are standard functions which do what you'd expect. mode() tells you the internal storage mode of the R object, not the value that occurs the most in its argument. But surely there is a standard library function that implements mode for a vector (or list).

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  • why do you write tests and what is a unit test and how does it differ other types of testing ?

    - by dfafa
    im curious as to know, why tests are written? why would bother writing it ? why not just compile and run the code or view it in your browser, click around and test out stuff. i mean i can understand, a crawler that checks your web app's functions....but why is tests written, maintained and treated as important as the main feature codes ? is it crucial to always write and use tests ?

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  • [PHP] How to pass array as multiple parameters to function?

    - by vbklv
    I have a parameters array: $params[1] = 'param1'; $params[2] = 'param2'; $params[3] = 'param3'; ... $params[N] = 'paramN'; I have a caller to various functions: $method->$function( $params ); How can I parse the $params array, so multiple (and unlimited) parameters can be passed to any function: $method->$function( $param[1], $param[2], ..., $param[N] );

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  • 'goto' usage

    - by Landon
    I've long been under the impression that 'goto' should never be used if possible. While perusing libavcodec (which is written in C) the other day, I noticed multiple uses of it. Is it ever advantageous to use 'goto' in a language that supports loops and functions? If so, why?

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  • What does (void**) mean in C?

    - by numerical25
    I would look this up, but honestly I wouldn't know where to start because I don't know what it is called. I've seen variables passed to functions like this: myFunction((void**)&variable); Which confuses the heck out of me cause all of those look familiar to me; I've just never seen them put together like that before. What does it mean? I am a newb so the less jargon, the better, thanks!

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  • Is there any difference between var name = function() {} & function name() {} in Javascript?

    - by Fletcher Moore
    Suppose we are inside a function and not in the global namespace. function someGlobalFunction() { var utilFunction1 = function() { } function utilFunction2 () { } utilFunction1(); utilFunction2(); } Are these synonymous? And do these functions completely cease to exist when someGlobalFunction returns? Should I prefer one or the other for readability or some other reason?

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  • How much data can a javascript global variable hold??

    - by alex
    Hi, To enable a go back function with an ajax div i have create these simple functions and i was wondering how much data a .js global variable can hold?? var dataAfterSearch; //global variable which holds our search results function goBackAfterSearch() { /** * function which displays the previous state * **/ $.ajaxSetup ({ cache: false }); //alert("Previous Search" +dataAfterSearch); $('#result').html(dataAfterSearch); paginateIt(); } function setDataAfterSearch(data) { /** * function to set the global dataAfterSearch * **/ dataAfterSearch = data; } kind regards

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  • In jQuery, is there any way to only bind a click once?

    - by Chris Henry
    I have an ajax app that will run functions on every interaction. I'd like to be able to run my setup function each time so all my setup code for that function remains encapsulated. However, binding elements more than once means that the handler will run more than once, which is obviously undesirable. Is there an elegant way in jQuery to call bind on an element more than once without the handler being called more than once?

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  • NHibernate and MySql Keywords

    - by jalchr
    Why Nibernate HQL can not handle the following query: from Deal D where (D.ApprovalDate + INTERVAL 1 Year) < current_timestamp() < (D.RenewalDate + INTERVAL -1 Year) knowing that INTERVAL and YEAR are keywords in MySQL, so this is kind of mixing Sql within Hql (unless Hql can handle date functions like so and I don't know) . The dialect is MySQLDialect Its perfectly valid to execute this query SELECT '2005-01-01' + INTERVAL 1 Year;

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  • C++ choose function by return type.

    - by anon
    I realize standard C++ only picks functions by argument type, not return type. I.e I can do something like: void func(int); void func(double); but not double func(); int func(); Where in the former, it's clear, in the latter, it's ambigious. Are there any extensions that lets me tell C++ to pick which function to use also by return type? Thanks!

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  • remove utf-8 figure spaces with php

    - by Jeroen Beerstra
    I have some xml files with figure spaces in it, I need to remove those with php. The utf-8 code for these is e2 80 a9. If I'm not mistaken php does not seem to like 6 byte utf-8 chars, so far at least I'm unable to find a way to delete the figure spaces with functions like preg_replace. Anybody any tips or even better a solution to this problem?

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  • Get the File name without file extension in VIM function.

    - by tr-sugumar
    I want to get the fine name without the file extension in VIM. I wrote the following functions in my .vimrc file for compile and run the Java program. :function! JAVA_RUN() :!javac %^M :endfunction map <F3> :execute JAVA_RUN()<CR> :source $HOME/.vimrc<CR> In side the function how can I get the file name with out the extension.

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