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• Why fork() before setsid()

  - by corentin.kerisit

  Why fork() before setsid() to daemonize a process ? Basically, if I want to detach a process from its controlling terminal and make it a process group leader : I use setsid(). Doing this without forking before doesn't work. Why ? Thanks :)

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• Facebook interview questions?

  - by Bansi

  I have a phone screening with Facebook scheduled next week. Can anyone guide me regarding the kind of questions they may ask.

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• Do we really need high level languages? [closed]

  - by i_love_c

  Seeing the amount of softwares developed (and still being developed) in C and considering the fact that C currently tops the TIOBE chart, I have this one question for you all: Do we really need high level languages like C# or F# or Ruby? Don't you think these so-called high level languages are actually spoiling programmers and resulting in suboptimal and non-efficient softwares?

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• question about copy constructor

  - by lego69

  I have this class: class A { private: int player; public: A(int initPlayer = 0); A(const A&); A& operator=(const A&); ~A(); void foo() const; }; and I have function which contains this row: A *pa1 = new A(a2); can somebody please explain what exactly is going on, when I call A(a2) compiler calls copy constructor or constructor, thanks in advance

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• Why would Mathematica break normal scoping rules in Module?

  - by Davorak

  As was pointed out in a recent post scoping does not work as expected inside of Module. An example from that thread is: Module[{expr}, expr = 2 z; f[z_] = expr; f[7]] (*2 z$1776*) But the following works as almost as expected. Module[{expr}, expr = 2 z; Set@@{f[z_], expr}; f[7]] (*14*) What language design consideration made wolfram choose this functionality?

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• What is your favourite language, why, what do you dislike about this language, and how might you fix

  - by jrtc27

  The title says it all! I am curious, as I only know .NET and Obj-C, and I am not sure what other languages are good to learn!

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• Do Silverlight and AJAX play complementary roles or will one replace the other?

  - by davemackey

  AJAX is the big thing...but it seems (to me) that with Silverlight 4 Microsoft has offered a really robust method for creating UI interfaces for the web. I'm wondering - what is the future of AJAX? Do AJAX and Silverlight complement each other or will Silverlight replace AJAX, etc.?

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• How do I set the socket timeout in Ruby?

  - by Readonly

  How do you set the timeout for blocking operations on a Ruby socket?

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• C++ pointers and constructors

  - by lego69

  if I have this snippet of the code A a1(i); A a2 = a1; A *pa1 = new A(a2); can somebody please explain what exactly the last line does, it makes copy of the a2 and pointer for this new object is pa1 or it just creates pointer for a2, thanks in advance

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• Why are there two slashes - forward and backward?

  - by Passionate programmer

  I'm totally confused which one to use and when, first thing I do when something goes wrong in code with a slash is replace the one with other so my test cases double with one for / and one for \ .Help me to get the logic behind slashes.

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• I want to run Turbo C++ in my 64bit laptop? But I can't find any version that support 64bit platform

  - by Starx

  I want to run Turbo C++ in my 64bit laptop? But I can't find any version of tc that support 64bit platforms. Do you know of any place I can download a compatible version?

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• Write an assembly program to input keystrokes from the PC’s keyboard and display the characters on t

  - by J-MO

  Write an assembly program to input keystrokes from the PC’s keyboard and display the characters on the system monitor. Pressing any of the function keys F1-F10 should cause the program to end. I have no idea how to write this code, and need some help por favor.

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• Clojure vs Haskell for web applications?

  - by user43737

  I want to learn a functional language that will be good for building web applications in the future. I am choosing between Clojure and Haskell. Which one is a better choice for my purpose?

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• What makes you to call yourself as a programmer? [closed]

  - by theband

  What makes you to call yourself as a programmer?

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• Sleep thread 100.8564 milisecond in c++ under window plateform

  - by Arman

  I there any method to sleep the thread upto 100.8564 millisecond under window OS. I am using multimedia timer but its resolution is minimum 1 second. Kindly guide me so that I can handle the fractional part of the milisecond.

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• How does ruby allow a method and a Class with the same name?

  - by Daniel Beardsley

  I happened to be working on a Singleton class in ruby and just remembered the way it works in factory_girl. They worked it out so you can use both the long way Factory.create(...) and the short way Factory(...) I thought about it and was curious to see how they made the class Factory also behave like a method. They simply used Factory twice like so: def Factory (args) ... end class Factory ... end My Question is: How does ruby accomplish this? and Is there danger in using this seemingly quirky pattern?

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• How can I make a singleton wrapper for PDO?

  - by user313944

  How can I make a singleton of the PDO extention? Extending doesn't work, because I get a fatal error when I try it ...

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• in C++, what is the best method to feed the O/P of one function to another function?

  - by Dilawar

  Under these conditions, The o/p of the first program is an large array of either integers, doubles or strings. Best method means the fastest on x86 architecture.

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• conversions in C++

  - by lego69

  I have this snippet of the code: header class A { private: int player; public: A(int initPlayer = 0); A(const A&); A& operator=(const A&); ~A(); void foo() const; friend A& operator=(A& i, const A& member); }; operator= A& operator=(A& i, const A& member){ i(member.player); return i; } and I have row in my code: i = *pa1; A *pa1 = new A(a2); at the beginning i was int how can I fix it, thanks in advance I have an error must be non-static function

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• Reading file into array

  - by Asmsycool

  Hello, I have these a file in a c program which consist of a string and 4 doubles and 2 integer in one line and there is a total of 28 lines, i want to read this file and load the data into an array. can someone help me solve this.

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• from string to integer (scripts)

  - by lego69

  I have this snippet of the code: set calls = `cut -d" " -f2 ${2} | grep -c "$numbers"` set messages = `cut -d" " -f2 ${3} | grep -c "$numbers"` @ popularity = (calls * 3) + messages and error @ expression syntax what does it mean? grep -c returns number, am I wrong, thanks in advance in $numbers I have list of numbers, 2 and 3 parameters also contain numbers

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• Why we need to set the variable private / public?

  - by Tattat

  Why don't make all variable private? All the variables must give a getter, setter to modify/read. Why leave the "public" keyword here? Except for convenient, any another reason for that?

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• Which progrmming language do u like atmost ? why ?

  - by Innovative

  Which progrmming language do u like atmost ? why ?

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• transferring parameters in C++

  - by lego69

  hello, can I have this snippet of the code: C *pa1 = new C(c2); and I transfer it to another function: foo(pa1); what exactly do I transfer actual pointer or its copy, thanks in advance and can somebody give some info about in which cases info is copied, and in which I transfer actual pointer

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• c++ possible errors

  - by lego69

  hello I've got error a1 was not declared in this scope, can somebody please explain me my fault my header: #ifndef QUIZ_H_ #define QUIZ_H_ #include "quiz.cpp" class A { private: int player; public: A(int initPlayer); ~A(); void foo(); }; #endif /* QUIZ_H_ */ implementation of class functions: #include "quiz.h" #include <iostream> using std::cout; using std::endl; A::A(int initPlayer = 0){ player = initPlayer; } A::~A(){ } void A::foo(){ cout << player; } my main #include "quiz.h" int main() { quiz(7); return 0; } function quiz: #include "quiz.h" void quiz(int i) { A a1(i); a1.foo(); }

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