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  • Programming CLI Commands in Program [C / LINUX]

    - by Blackbinary
    I am attempting to make a program in C which presents a GUI and allows the user to select from a list of applications, which to install on the computer. I can manage the gui, but I've never been taught how to actually issue command line commands. I know with bash its just apt-get install firefox for example, but how do I do such a thing with C? i.e. on click, the program runs 'apt-get install The other problem is I'm not familiar with the proper name for this interaction, so it is hard to search. Thanks for the help

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  • Label Text Changed Event

    - by Rajesh
    In my page if the text of a Label has been Changed I need to fire some function using JQuery as .Change() is restricted to only <input> and <select> I use a function like $("#ctl00_ContentPlaceHolder1_lblMsg").html("Duplicate record can't be saved.") .trigger('labelchanged') $("#ctl00_ContentPlaceHolder1_lblMsg").on('labelchanged', function () { alert('changed!'); } }); but the above function is not triggered when the text of the label has been changed kindly anyone point me what could be I am missing in the above function

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  • Socket Programming : Inputstream Stuck in loop - read() always return 0

    - by Atom Skaa ska Hic
    Server side code public static boolean sendFile() { int start = Integer.parseInt(startAndEnd[0]) - 1; int end = Integer.parseInt(startAndEnd[1]) - 1; int size = (end - start) + 1; try { bos = new BufferedOutputStream(initSocket.getOutputStream()); bos.write(byteArr,start,size); bos.flush(); bos.close(); initSocket.close(); System.out.println("Send file to : " + initSocket); } catch (IOException e) { System.out.println(e.getLocalizedMessage()); disconnected(); return false; } return true; } Client Side public boolean receiveFile() { int current = 0; try { int bytesRead = bis.read(byteArr,0,byteArr.length); System.out.println("Receive file from : " + client); current = bytesRead; do { bytesRead = bis.read(byteArr, current, (byteArr.length-current)); if(bytesRead >= 0) current += bytesRead; } while(bytesRead != -1); bis.close(); bos.write(byteArr, 0 , current); bos.flush(); bos.close(); } catch (IOException e) { System.out.println(e.getLocalizedMessage()); disconnected(); return false; } return true; } Client side is multithreading,server side not use multithreading. I just paste some code that made problem if you want see all code please tell me. After I debug the code, I found that if I set max thread to any and then the first thread always stuck in this loop. That bis.read(....) always return 0. Although, server had close stream and it not get out of the loop. I don't know why ... But another threads are work correctly. do { bytesRead = bis.read(byteArr, current, (byteArr.length-current)); if(bytesRead >= 0) current += bytesRead; } while(bytesRead != -1);

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  • is this correct syntax to create onclick event on dynamic html document

    - by user321382
    var val1=document.createElement("input"); val1.setAttribute('type',"image"); val1.setAttribute('src',"../images/delete.gif"); val1.setAttribute('id',chkid); val1.setAttribute('name',"val2"); val1.setAttribute('class',"mylist2"); val1.onclick=function(){var block=document.getElementById("repeat_ul"); var obj=document.getElementById('country_chk'); document.block.removeChild(obj);};

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  • Socket Programming for the Web

    - by Benny
    I have to interact with a legacy system that accepts socket communication and messages. My goal is to make the application cross-platform, but I need the ability to push messages to the client (i.e. - .NET's WCF, Java's Comet) and detect when the user closes out of their browser to destroy the socket. I have built a prototype of .NET wrapper + WCF + Silverlight but it is so disconnected it is difficult to manage the state of the user and seems to be a nightmare to support. All of that considered, what would be my best option?

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  • c++ programming for clusters and HPC

    - by Abruzzo Forte e Gentile
    HI All I need to write a scientific application in C++ doing a lot of computations and using a lot of memory. I have part of the job but due to high requirements in terms of resources I was thinking to start moving to OpenMPI. Before doing that I have a simple curiosity: If I understood the principle of OpenMPI is the developer that has the task of splitting the jobs over different nodes calling SEND and RECEIVE based on node available at that time. Do you know if it does exist some library or OS or whatever that has this capability letting my code reamain as it is now? Basically something that connects all computers and let share as one their memory and CPU? I am a bit confused because of the high material available on the topic. Should I look at cloud computing? or Distributed Shared Memory? Can you help me or address me a bit? Thanks

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  • How to understand the programming of an operating system

    - by piemesons
    Hello, I want to learn the operating system. How it works. I don't want to make my own operating system. I just want to learn how it works. As I can find out source code of any open source OS. But how to start. Like starting from the first elementary kernel (whatever it is). Somebody suggested I try to implement Linux from scratch etc. Please guide me in a proper way. I want to know about the proper path to follow. I am ready to invest three to four years just to understand the basics. I have good fundamentals of C, C++, PHP, OOP and compiler design.

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  • JQuery conflict with body onload event.

    - by Evgeny
    Strange conflict in my code. I have function that called from body onload: var someGlobalVar=new SpecialType(); function OnBodyLoad() { someGlobalVar.Bind(); } but when i include JQuery 1.4.2 to my project i have error that someGlobalVar is undefined. Why global variable now is undefined and what ways to fix it?

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  • Javascript function programming — receiving elaborate parameters

    - by Barney
    I'm writing a Javascript function that would manipulate an array written on-the-fly and sent as a parameter. The function is written as follows: function returnJourney(animation,clean){ var properties = {}; // loads of other inane stuff for(i in animation[0]) properties[animation[0][i]] = animation[0].i; // heaps more inane stuff } The animation in question is a set of parameters for a jQuery animation. Typically it takes the format of ({key:value,key:value},speedAsInteger,modifierAsString). So to kick off initial debugging I call it with: returnJouney(({'foo':'bar'},3000),1); And straight off the bat things are way off. As far as I see it this would have returnJourney acknowledge clean === 1, and animation being an array with an object as its first child and the number 3000 as its second. Firebug tells me animation evaluates as the number 3000. What am I doing wrong?

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  • Why do people run Java GUI's on the Event Queue

    - by asmo
    In Java, to create and show a new JFrame, I simply do this: public static void main(String[] args) { new JFrame().setVisible(true); } However, I have seen many people doing it like this: public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { public void run() { new JFrame().setVisible(true); } }); } Why? Are there any advantages?

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  • casting issue with realpath function (c programming)

    - by Ralph
    When I compile the following code: #define _POSIX_C_SOURCE 200112L #define _ISOC99_SOURCE #define __EXTENSIONS__ #include <stdio.h> #include <limits.h> #include <stdlib.h> int main(int argc, char *argv[]) { char *symlinkpath = argv[1]; char actualpath [PATH_MAX]; char *ptr; ptr = realpath(symlinkpath, actualpath); printf("%s\n", ptr); } I get a warning on the line that contains the call to the realpath function, saying: warning: assignment makes pointer from integer without a cast Anybody know what's up? I'm running Ubuntu Linux 9.04

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  • Execution sequence inside a jquery event handler

    - by user576358
    I have a big issue with the execution squence inside this jquery handler : Was wondering if anyone has come accross this before: I have a simple form: <form action='foo.cgi' id='myForm' > <input type=text name='name' /> <input type=submit value='Find it!'/> </form> when user clicks on Find it! would like to change the cursor to 'progress' before the data is returned through an ajax call: $(document).ready(function(){ $("#myForm ").submit(function(){ $("body").css("cursor", "progress") ; htmlobj=$.ajax({url:server_url,..........); } } However: The cursor [line 2 above ] does not change until data is returned through ajax - Seems like line 3. gets executed before 2. Any help is greatly appreciated

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  • Portable Socket programming in C/C++ possible?

    - by questions
    I am thinking of creating a multi-platform portable C++ server-client application. Is it even possible while using only standard libraries? If no, what other libraries are there? Are there any improvements in this direction in C++11x? Like for threads, now we have std::threads. To make it more clear.. I want something like boost::thread, which provides multiplatform portable multithreading, for networking. And why C++ doesn't have libraries(standard) for such basic things like networking?

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  • Adding an additional click event to every element (JavaScript / jQuery)

    - by Gausie
    I'm developing a touchscreen application that, aside from everything else, records the amount of times the screen is used so that the user can be reminded to clean the screen after a predefined number of clicks. I've got the click functions written nicely, all I need now is make sure the function is called on a click. I imagine $('*').click(function() { //do something }); would accomplish my goal, but is that the best way? Also, would that overwrite other click functions assigned to the elements?

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  • Print the first line of a file C programming

    - by Pedro
    void cabclh(){ FILE *fp; char *val, aux; int i=0; char *result, cabeca[60]; fp=fopen("trabalho.txt","r"); if(fp==NULL){ printf("ERROR\n"); return ; } val=(char*)calloc(aux, sizeof(char)); while(fp='\n'){ fgets(cabeca,60,fp); printf("%s\n",cabeca); } fclose(fp); free(fp); } I want to open a file and print the first line. the problem here is in while(fp='\n'), what i'm doing wrong. How can i make a function that recognize the first char from a file... like: FILE *arq; char info[20]; arq=fopen("trabalho.txt","r"); if(fp==NULL){ printf("ERROR\n"); return ; } if(fp[0]='-'){ //check if the first element is a '-' printf("It's info\n"); }

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  • jQuery hover() event on div element within a button element

    - by jakeisonline
    I can't seem to get jQuery to notice the div within the following markup <button class="button submit positive right" id="omnisubmit" type="submit"> <div class="label">Submit</div> <div class="controller">&nbsp;</div> </button> And here is the jQuery I'm currently using: $("button#omnisubmit div.controller").hover(function () { console.log("Hover..."); }); However, jQuery doesn't seem to pick up when the mouse is hovering over that div, $("button#omnisubmit div.controller").hover( works correctly, of course. I have a feeling it's because putting divs inside buttons may not be standard HTML?

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  • Event handling C# / Registering a callback

    - by Jeff Dahmer
    Events can only return void and recieve object sender/eventargs right? If so then craptastic.... how can I pass a function pointer to another obj, like: public bool ACallBackFunc(int n) { return n > 0; } public void RegisterCallback(Something s) { s.GiveCallBack(this.ACallBackFunc); } Something::GiveCallBack(Action? funcPtr) I tried using Action, but I need it to return some value and Actions can only return void. Also, we do not know what kind of a callback we will be recieving; it could return anything and have any params! Reflection will have to be used somehow I reckon.

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  • The D Programming Language for Game Development

    - by n2liquid
    Hi all, Recently I've been bothered because I reached a point in which C++ (even 0x) felt very limited, so I started looking for alternatives. Forget Java, C#, Python or Ruby. I still like the low-level nature of C++ and I'm not fond of virtual machines. Further, I'm a game engine developer, so I have to develop core routines which must be really fast, and lately I've been hungry for code expressiveness. C++ is an almost-there language for me, but there are many exceptions on how to use templates, and GCC isn't optimizing stuff as well as I'd hoped it would. So I'm considering to start learning D. Do you think it will suffice my needs as a game developer? I'm weary because I've never heard of D being used for that. Thanks!

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  • GWT designing using java programming

    - by user302593
    Hi.. I have created one gwt application. In the client package i inculded two java file contains gwt coding. In the first java program i included one Hyperlink when this Hyperlink is clicked it should redircted to Second file which also contains some GWT coding. I dont know how to redirect the java file. Help me on this issue... Regards, Raji

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  • joining programming projects for free

    - by josephj1989
    Hi All Not sure if this is an appropriate question for the forum. I an experienced software developer with over 15 years in design and development of systems -mostly using Oracle software and ERP solutions using Oracle Apps. But due to some personal reasons I had to stay away from work for a period of 5 years.Now I am finding it hard to get back in. I have trained myself thoroughly in microsoft technologies C#,.NET,SQL SERVER,ASP .NET and also certified in these areas.Now I want to gain some practical experience with these technologies.I am very willing to take up some project work for free so that I can gain some experience and also add to my portfolio. Is any of you in a position to give me some voluntary work. I did try to find open source work but none is available. I can do the following very well. Analysis/Design Oracle Database PLSQL/SQL SQL Server TSQL C# .NET and .NET Platform ASP.NET I can also do Web Development HTML,CSS, JAVASCRIPT,JQUERY Unix Shell Scripting Java Swing Development Thanks

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  • Bind event to right mouse click

    - by zac
    How can I trigger some action with right click after disabling the browser context menu ? I tried this . . . $(document).ready(function(){ $(document).bind("contextmenu",function(e){ return false; $('.alert').fadeToggle(); }); }); .alert { visibility: hidden; }

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