Sponsored Content
Top Forums Programming what is diff b/w copy constructor and overloaded assignment operator Post 302130400 by porter on Monday 6th of August 2007 05:16:58 AM
Old 08-06-2007
A copy constructor creates a new object as part of the assignment.

An overloaded assignment assigns a value to an existing object.
 

10 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

copy diff files

I have to synchronize files on two machines, but these are not connected via LAN. Now I'm using DVD's to copy new data. The question is how can I create a list of files on one machine and having this list archive or copy only new files from other. Are there any standard tools like diff/patch for... (3 Replies)
Discussion started by: Hitori
3 Replies

2. Shell Programming and Scripting

scalar variable assignment in perl + { operator

When reading over some perl code in a software document, I came across an assignment statement like this $PATH = ${PROJECT}/......./.... In this particular form of scalar variable assignment, what does the curly braces operators do ? Also, what is the benefit in doing scalar assignment this... (3 Replies)
Discussion started by: JamesGoh
3 Replies

3. Shell Programming and Scripting

Copy data and send it to other file, with diff config

I need a new script to 'grep' data from files in var and send it to another file in var folder with diff output, but like you now my Now How is very, very small then to have a idea is something like this: in file text1.txt have a few lines like this one: Y: { XXX1 { XXX2 YYYY { IIIIIIII... (0 Replies)
Discussion started by: single
0 Replies

4. Programming

Doubt regarding Copy Constructor and return value

Hi All, I have made the simple following program :- #include <string> #include <iostream> using namespace std; class A{ private: int val; public : A(){cout<<"In A()"<<endl;} A (const A& aa) { cout<<"In copy c'tor"<<endl; } }; A f(... (1 Reply)
Discussion started by: shubhranshu
1 Replies

5. Programming

c++ assignment operator overloading

Hello everyone! Suppose that I have something like this A a; a.mem=new int; A b = a; where class A { public: int * mem; A() : mem(NULL) { } ~A() { if (mem!=NULL) delete mem; (1 Reply)
Discussion started by: bashuser2
1 Replies

6. Programming

Doubts on C++ copy constructor concept

Hi, If I run the following program class A { public: A() { cout << "default" << endl; } A(const A&) { cout << "copy" << endl; } }; A tmp; A fun() { return tmp; } A test() { A tmp; cout << &tmp << endl; return tmp; } (1 Reply)
Discussion started by: royalibrahim
1 Replies

7. Shell Programming and Scripting

diff script to copy files to other dir when not exists

I have two directories that are mostly the same: dir1 dir2 Is there an easy way to take the output of diff and copy files from dir1 that do not exist in dir2 - but copy them to the same path (many nested directories). am only trying to copy files in dir1 that do not exist in dir2. ... (5 Replies)
Discussion started by: jvsrvcs
5 Replies

8. Programming

Need to understand the overloaded assignment operator behavior

Hi, In the following code, class A { public: void operator=(const A& rhs) { if (this == &rhs) cout << "self-assigned"; } }; class B { A a; // should not be a pointer member, (i.e) A* a }; int main() { B b; b = b; // Ans: self-assigned } I am really... (5 Replies)
Discussion started by: royalibrahim
5 Replies

9. Shell Programming and Scripting

Assignment operator without operand

Does anyone know how this line in bash works? local gotbase= force= nicelevel corelimit local pid base= user= nice= bg= pid_file= local cgroup= These lines are part of the daemon function inside the "functions" file at /etc/init.d in RH. (3 Replies)
Discussion started by: Rameshck
3 Replies

10. Shell Programming and Scripting

Bash variable assignment failure/unary operator expected

I have a little code block (executing on AIX 7.1) that I cannot understand why the NOTFREE=0 does not appear to be assigned even though it goes through that block. This causes a unary operator issue. #!/bin/bash PLATFORM="AIX" NEEDSPC=3000 set -x if ; then lsvg | grep -v rootvg | while... (6 Replies)
Discussion started by: port43
6 Replies
qmail-users(5)                                                  File Formats Manual                                                 qmail-users(5)

NAME
qmail-users - assign mail addresses to users OVERVIEW
The file /var/lib/qmail/users/assign assigns addresses to users. For example, =joe.shmoe:joe:503:78:/home/joe::: says that mail for joe.shmoe should be delivered to user joe, with uid 503 and gid 78, as specified by /home/joe/.qmail. Assignments fed to qmail-newu will be used by qmail-lspawn to control qmail-local's deliveries. See qmail-newu(8). A change to /var/lib/qmail/users/assign will have no effect until qmail-newu is run. STRUCTURE
/var/lib/qmail/users/assign is a series of assignments, one per line. It ends with a line containing a single dot. Lines must not contain NUL. SIMPLE ASSIGNMENTS
A simple assignment is a line of the form =local:user:uid:gid:homedir:dash:ext: Here local is an address; user, uid, and gid are the account name, uid, and gid of the user in charge of local; and messages to local will be controlled by homedir/.qmaildashext. If there are several assignments for the same local address, qmail-lspawn will use the first one. local is interpreted without regard to case. WILDCARD ASSIGNMENTS
A wildcard assignment is a line of the form +loc:user:uid:gid:homedir:dash:pre: This assignment applies to any address beginning with loc, including loc itself. It means the same as =locext:user:uid:gid:homedir:dash:preext: for every string ext. A more specific wildcard assignment overrides a less specific assignment, and a simple assignment overrides any wildcard assignment. For example: +:alias:7790:2108:/var/lib/qmail/alias:-:: +joe-:joe:507:100:/home/joe:-:: =joe:joe:507:100:/home/joe::: The address joe is handled by the third line; the address joe-direct is handled by the second line; the address bill is handled by the first line. SEE ALSO
qmail-pw2u(8), qmail-newu(8), qmail-lspawn(8) qmail-users(5)
All times are GMT -4. The time now is 12:55 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy