Search Results

Search found 16243 results on 650 pages for 'io language'.

Page 502/650 | < Previous Page | 498 499 500 501 502 503 504 505 506 507 508 509  | Next Page >

• "Inlining" (kind of) functions at runtime in C

  - by fortran

  Hi, I was thinking about a typical problem that is very JIT-able, but hard to approach with raw C. The scenario is setting up a series of function pointers that are going to be "composed" (as in maths function composition) once at runtime and then called lots and lots of times. Doing it the obvious way involves many virtual calls, that are expensive, and if there are enough nested functions to fill the CPU branch prediction table completely, then the performance with drop considerably. In a language like Lisp, I could probably process the code and substitute the "virtual" call by the actual contents of the functions and then call compile to have an optimized version, but that seems very hacky and error prone to do in C, and using C is a requirement for this problem ;-) So, do you know if there's a standard, portable and safe way to achieve this in C? Cheers

  Read the article

• Singelton restricted to instance of dll

  - by codeySmurf

  If I create a singleton class in the context of a dll, the singleton class is instantiated once and used by all instances of the dll. I am using a dll as a plug-in for an application. Now the following thing came to my mind: If I use a singleton Class, it will be shared across multiple instances of the plug-in. However, this makes it difficult to manage the lifetime of the singleton class efficiently. The only way I could think of would be to use a reference count and to make the singleton delete its self when the reference count is 0. Does anyone have any better ideas on that? Is there any good way to restrict the singleton object to one instance of the dll? Language is c++

  Read the article

• How does Google Analytics save data to a database

  - by Pranz

  Hello everyone, I am making a Google Analytics like project for my school assignment. I have two questions primarily: 1) Exactly when does Google store the data to the database? When it does it use XHR with some server side scripting language to store it to the database or is there a way to do it using plain javascript? 2) How do I get the IP address of a user from Javascript? How does Google do for Analytics?? Thanks for all the help. Pranz

  Read the article

• Parsing through Arabic / RTL text from left to right

  - by Dan W

  Let's say I have a string in an RTL language such as Arabic with some English chucked in: string s = "Test:?????;?????;?????;a;b" Notice there are semicolons in the string. When I use the Split command like string[] spl = s.Split(';');, then some of the strings are saved in reverse order. This is what happens: ??Test:????? ????? ????? a b The above is out of order compared to the original. Instead, I expect to get this: ?Test: ????? ????? ????? a b I'm prepared to write my own split function. However, the chars in the string also parse in reverse order, so I'm back to square one. I just want to go through each character as it's shown on the screen.

  Read the article

• Why do so many people dislike C++?

  - by General K

  Beginners and professional, on blogs, in forums and chatrooms - people say it everywhere: C++ oh dear god no The short form of the question: For what reason is C++ so widely disliked and people are horrified by the imagination of using it for some project? I have been using a lot of different languages, including C++ by now, and I can only say that I really like it. I'm far more horrified by Delphi than by C++. Actually, I find it's an almost perfect, compiled language! I've been doing a lot of different projects in C++ as well, ranging from 3D video games to webservers and emulators for old video game consoles. And I still do not see the problem everyone else seems to have with it!

  Read the article

• Can I work with Visual Studio Project and Solution files in a team using Subversion?

  - by flyx

  We're a team of students doing a software project. As some of us don't use Windows, but the product needs to run on Windows and .NET, we want to develop on MonoDevelop and Visual Studio which both use Visual Studio files; language of choice is C#. My question is: Can we check in the solution and project files into our repository without the possibility of severe conflicting problems? Example: Two guys add a new file to the same project, save and commit their changes. Will the project file get a conflict?

  Read the article

• Count Similar iTems in Array

  - by Taimur Hamza

  Hi guys, I need to count the similar elements in an array. For example, if i have an array, array[0,0,0,1,2,3,3].The number of 0's are 3 , no. of 1's are 1 , no. of 2's are 1 , no. of 3's are 2 in this array . I am sorry if this message has been posted before. Help is appreciated. Thanks in advance. Regards, THM P.S : Language is C/C++

  Read the article

• How to pass an anonymous array of strings to a JavaScript function?

  - by abatishchev

  I want to pass to an array of controls' IDs to a javascript script function so it will switch control's enable state. For example, in C# it would be like this: func(false, new[] { "Control1", "Control2", "Control3" }); In that function I want to find corresponding controls and disable/enable them. For one control I do this next way: <script type="text/javascript" language="javascript"> function switchControls(value, arr) { for (var n = 0; n < array.length; n++) document.getElementById(n).disabled = value; } </script> <asp:CheckBox runat="server" onclick="switchControls(this.checked, [ '<%= Control1.ClientID %>', '<%= Control2.ClientID %>' ])" Text="Take?" /> How to implement this properly? Have I to use jQuery?

  Read the article

• When can we say that we have mastered something

  - by Thinking

  I donot know if this is a valid question to ask here or not but I have asked this as because i have the doubt In many interviews , the interviewer ask as how much you want ot rate yourself on a scale of 10 in C#, Jave etc. Some says 6 some 7 .... My question is how to judge where I am standing at present? And when can we say that we have mastered a language or a topic. As everything is huge and everyday we learn something.. so there is no end to it... so how can I judge that? Thanks

  Read the article

• How is this problem usually solved without using sever-side scripting?

  - by cyggi

  Simple problem I have so far always solved via PHP: You have a site with header, menu, footer and content field. Header, menu and footer are usually the same for each page. How do you, without PHP or any other server-side language, have the header, menu and footer data exist only in one file? So that for example you don't have ten sites (like home.html, products.html, about.html, ..) all having a copy of the static header and menu in their html files. Now if you want to change the header you have to change ten files. I hope I made my question clear enough, if not please leave a comment :)

  Read the article

• control.focus() after selectedIndexChanged

  - by kyle

  I need to focus on a textbox after an item has been selected from a dropdownlist. I've tried control.focus() and setfocus(). The last thing I've tried was Set_Focus(dtbEffectiveDate.ClientID) inside the SelectedIndexChanged method with the folowing method. Protected Sub Set_Focus(ByVal ControlName As String) Dim strScript As String strScript = "<script language=javascript> window.setTimeout(""" + ControlName + ".focus();"",0); </script>" RegisterStartupScript("focus", strScript) End Sub I'm out of answers so any help would be awesome.

  Read the article

• How to execute an exe using Javascript?

  - by Karthick

  I need to open an EXE from a folder, when the folder is present, using javascript. I have added the code, but am not able to open the EXE after checking the folder, please share your thoughts. <html> <body> <script language="JScript"> <!-- function checkfolder() { var myObject; myObject = new ActiveXObject("Scripting.FileSystemObject"); if(myObject.FolderExists("\\tmp")) { alert("tmp Folder Exists"); } else { alert("tmp Folder doesn't exist"); } } --> </script> Check for folder "tmp" <form name="myForm"> <input type="Button" value="Check Folder" onClick='checkfolder()'> </form> </body> </html>

  Read the article

• Scheme - What is wrong with my attempt to extend this declaration?

  - by CppLearner

  This is a homework question. Question My attempt (the whole file): http://pastebin.com/vt3Q3dqs If you search let var = exp1 in body, that's the function I need to extend according to the question. When I test the sample code above, I get an error apply-env: No binding for y (eval "let x = 30 in let x = -(x,1) y = -(x,2) in -(x,y)") ; The following is execution log The-next-two-lines-shows-var-and-exp1 (x) (#(struct:const-exp 30)) diff-exp #(struct:var-exp x) #(struct:const-exp 1) diff-exp #(struct:var-exp x) #(struct:const-exp 2) The-next-two-lines-shows-var-and-exp1 (x y) (#(struct:diff-exp #(struct:var-exp x) #(struct:const-exp 1)) #(struct:diff-exp #(struct:var-exp x) #(struct:const-exp 2))) diff-exp #(struct:var-exp x) #(struct:var-exp y) As you can see, when the interperter reads the last line -(x,y) it complains because there is no binding. What did I do wrong? I know this is really long language, but if anyone can kindly lead me to the right direction would be really really nice. Thank you!

  Read the article

• Using ANTLR with Left-Recursive Rules

  - by CNevin561

  Basically Ive written a Parse for a language with just basic arithmetic operators ( +, -, * / ) etc, but for the minus and plus cases, the Abstract Syntax Tree which is generated has parsed them as right associative when they need to be left associative. Having a googled for a solution, i found a tutorial that suggests rewriting the rule from: Expression ::= Expression <operator> Term | Term as Expression ::= Term <operator> Expression*. However in my head this seems to generate the tree the wrong way round. Any pointers on a way to resolve this issue?

  Read the article

• If I start learning C on Ubuntu will it give me an edge when I start learning Objective-C later this

  - by Anonymous

  I know Ruby right now, however I want to learn a new language. I am running Ubuntu 10.04 right now but I am going to get a Mac later this summer. Anyways I want something more for GUI development. I was wondering if I should learn C on Ubuntu right now, and then learn Objective-C when I get an iMac? Will learning C give me an edge? Or should I just learn Python on Ubuntu and then learn Objective-C when I get a new computer? Please give me your opinions! Thanks!

  Read the article

• Resolve circular typedef dependency?

  - by Nick

  What is the best way to resolve the following circular dependency in typedef-ing these structs? Note the C language tag - I'm looking for a solution in standard gcc C. typedef struct { char* name; int age; int lefthanded; People* friends; } Person; typedef struct { int count; int max; Person* data; } People;

  Read the article

• Determining child count of path

  - by sqlnewbie

  I have a table whose 'path' column has values and I would like to update the table's 'child_count' column so that I get the following output. path | child_count --------+------------- | 5 /a | 3 /a/a | 0 /a/b | 1 /a/b/c | 0 /b | 0 My present solution - which is way too inefficient - uses a stored procedure as follows: CREATE FUNCTION child_count() RETURNS VOID AS $$ DECLARE parent VARCHAR; BEGIN FOR parent IN SELECT path FROM my_table LOOP DECLARE tokens VARCHAR[] := REGEXP_SPLIT_TO_ARRAY(parent, '/'); str VARCHAR := ''; BEGIN FOR i IN 2..ARRAY_LENGTH(tokens, 1) LOOP UPDATE my_table SET child_count = child_count + 1 WHERE path = str; str := str || '/' || tokens[i]; END LOOP; END; END LOOP; END; $$ LANGUAGE plpgsql; Anyone knows of a single UPDATE statement that does the same thing?

  Read the article

• Designing operation (a,b) -> (c,d)

  - by golergka

  I have an operation that I need to design. That operation takes two objects of a certain class X, and returns two new objects of the same class (I may need the originals later). The logic that dictates the selection of this object is contained in class Y. On one hand, I don't want class Y to know details about class X implementation; on the other, I don't want class X to know details about selecting the different objects to perform this operation on. If that was all the problem, I'd just create a static method on class A. However, the methods in language I'm working on return only one object. Also, the operation needs to be robust, and calling operation two times to get C and D respectively isn't possible, as both C & D both rely on a single random number. How should I design such operation? Update: I'm using Obejctive C.

  Read the article

• Why does Generic class signature requires specifying new() if type T needs instantiation ?

  - by this. __curious_geek

  I'm writing a Generic class as following. public class Foo<T> : where T : Bar, new() { public void MethodInFoo() { T _t = new T(); } } As you can see the object(_t) of type T is instantiated at run-time. To support instantiation of generic type T, language forces me to put new() in the class signature. I'd agree to this if Bar is an abstract class but why does it need to be so if Bar standard non-abstract class with public parameter-less constructor. compiler prompts following message if new() is not found. Cannot create an instance of the variable type 'T' because it does not have the new() constraint

  Read the article

• Java: Can't implement runnable on a test case: void run() collides

  - by Zombies

  So I have a test case that I want to make into a thread. I cannot extend Thread nor can I implement runnable since TestCase already has a method void run(). The compilation error I am getting is Error(62,17): method run() in class com.util.SeleneseTestCase cannot override method run() in class junit.framework.TestCase with different return type, was class junit.framework.TestResult. What I am trying to do is to scale a Selenium testcase up to perform stress testing. I am not able to use selenium grid/pushtotest.com/amazon cloud at this time (installation issues/install time/resource issues). So this really is more of a Java language issue for me.

  Read the article

• ASP.NET MVC: Redundant (strongly typed) views in CRUD areas.

  - by UpTheCreek

  In the CRUD areas of my MVC app I have lots of seemingly pointless view files, such as: <%@ Page Title="" Language="C#" MasterPageFile="Some.Master" Inherits="System.Web.Mvc.ViewPage<SomeModel>" %> <asp:Content ID="ContentID" ContentPlaceHolderID="SomePlaceHolder" runat="server"> <%= Html.DisplayForModel() %> </asp:Content> This is of course pretty unDRY. Is it possible to use a shared view for this while at the same time preserving the Strong Typing? (e.g. by specifying the generic type in the controller?)

  Read the article

• Netbeans Intellisense for Rails

  - by irishfury

  Has anybody figured out a way to make the Netbeans intellisense for ruby and rails better? It either has too many options in the list (which I understand is a problem since it is a dynamic language). Or it has no options in the list, as if it is not dynamic enough to find everything. Are there any hacks to make it better, or is this just something that needs to be improved within the Netbeans source code? I'm currently using 6.8. Please spare me the posts about how I don't really need to use intellisense, and I should use vim or emacs. I'm sure the vim programmers are 10 times more productive than me with all their cool shortcuts, but I have no desire to learn these tools.

  Read the article

• Remove specified text from beginning of lines only if present (C#)

  - by Zach

  I have a textbox in which the user can edit text, in a scripting language. I've figured out how to let the user comment out lines in one click, but can't seem to figure out how to uncomment properly. For example, if the box has: Normal Text is here More normal text -- Commented text -- More commented text Normal Text again --Commented Text Again So, when the user selects any amount of text and decides to uncomment, the "--" is removed from the beginning of the lines that have it. The lines without the "--" should be unaffected. In short, I want an uncomment function that performs similar to the one in Visual Studio. Is there any way to accomplish this? Thanks

  Read the article

• Community based translating system

  - by mike

  Since we don't funds to hire translators for getting multiple languages translated we want the community to do the translation for us. Its a social network. I can't find any good open souce framework to auto do this. Thinking something like: User selects a language, system displays random sentences and user will translate it. Then other users can vote on how good it is. If it's 100 votes + with 95% yes then it becomes official. Site is in PHP. Any ideas?

  Read the article

• Is the FoldLeft function available in R?

  - by JSmaga

  Hi, I would like to know if there is an implementation of the foldLeft function (and foldRight?) in R. The language is supposed to be "rather" functional oriented and hence I think there should be something like this, but I could not find it in the documentation. To me, foldLeft function applies on a list and has the following signature: foldLeft[B](z : B)(f : (B, A) => B) : B It is supposed to return the following result: f(... (f(f(z, a0), a1) ...), an) if the list is [a0, a1, ..., an]. (I use the definition of the Scala List API) Does anybody know if such a function exists in R?

  Read the article

< Previous Page | 498 499 500 501 502 503 504 505 506 507 508 509  | Next Page >