Vector of pointers: some clarification needed

Vector of pointers: some clarification needed

Content Index :

Vector of pointers: some clarification needed
Tag : cpp , By : Santhanam
Date : December 01 2020, 04:55 PM

No Comments Right Now !

Boards Message :
You Must Login Or Sign Up to Add Your Comments .

Share : facebook icon twitter icon

rails 3: clarification needed on which controllers are needed for HABTM relationships

Tag : ruby-on-rails , By : OllieDoodle
Date : March 29 2020, 07:55 AM
this will help I think that one way to do it could be the following:
I would accept the event to have the user as a nested resource this way:
class Event < ActiveRecord::Base
    has_many :users
    accepts_nested_attributes_for :events 
class ApplicationController < ActionController::Base
  def add_user_to_event
    @event = Event.find(params[:event])
    @user = User.find(params[:user])
    @event.users << @user

Some clarification needed in the struct pointers

Tag : c , By : Diego
Date : March 29 2020, 07:55 AM
With these it helps The problem here is that the "->" operator is binding more tightly than the "*" operator. So your first statement:
// what you have written
// what you're getting - bad
// what you want - good

On C++ pointers and references, clarification needed

Tag : cpp , By : Jesse
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further
void foo (int &something) // Will accept an address of something
void foo (something); // "something" must be a variable

(C++) Clarification needed about accessing derived functions from a vector of pointers

Tag : cpp , By : user161380
Date : March 29 2020, 07:55 AM
Hope this helps It is hard to follow what exactly do you mean, but I think you refer to automatic allocation getting destroyed. Something among the lines of:
// WARNING: incorrect code
std::vector<base*> v;
for (int i = 0; i < 10; i++) {
  Derived d;

// WARNING: incorrect code
std::vector<base*> v;
for (int i = 0; i < 10; i++) {
  Derived* d = new Derived();
  delete d;


Pass vector of pointers by reference and replace a vector of void* pointers

Tag : cpp , By : jaime
Date : March 29 2020, 07:55 AM
Related Posts Related QUESTIONS :
  • Template argument deduction for inheriting specializations
  • dlopen undefined reference
  • Member function of class with template arguments and default arguments outside class
  • Is it possible to implement a non-owning "slightly smart" pointer on top of standard weak pointers?
  • how to configure the AcquireCredentialsHandleA correctly
  • Using private versions of global extern variables with OpenMP
  • Eigen Block wrong amount of columns and rows
  • Memory alignment rules in inheritance
  • Is nullptr falsy?
  • tm_wday returns a large integer outside 0-6 range
  • Scope a using declaration, inside a header
  • How to specify constructor's template arguments inside a new expression?
  • Sort an array via x86 Assembly (embedded in C++)?? Possible?
  • How to Replace only Part of the Variable using #define
  • How do you compare the performace of valarrays vs built-in arrays?
  • Is it normal for C++ static initialization to appear twice in the same backtrace?
  • c++ generate a good random seed for psudo random number generators
  • Why isn't my operator overloading working properly?
  • Getting meaningful error messages from fstream's in C++
  • C++: Converting Julian dates to Gregorian
  • Could someone explain this interesting behaviour with Sleep(1)?
  • Is it possible to roll a significantly faster version of modf
  • Updating pointer using signals and slots
  • How are classes more secure than structures?
  • finding "distance" between two pixel's colors
  • C++ Greatest Number Verification
  • Why does my token return NULL and how can I fix it?(c++)
  • C++ enforce conditions on inherited classes
  • what happened if an exception is not captured?
  • Redundant naming in C/C++ typedefs/structs
  • question about STL thread-safe and STL debugging
  • killing a separate thread having a socket
  • Returning the size of available virtual memory at run-time in C++
  • Parallel computing for integrals
  • How do I force my std::map to deallocate memory used?
  • C++ Templates: implicit conversion, no matching function for call to ctor
  • Adding python script to c++ project
  • C++ private pointer "leaking"?
  • Initializing Primitive Array to One Value
  • how is push_back implemented in STL vector?
  • C++ Profiling: KiFastSystemCallRet
  • Multiple rows with a single INSERT in SQLServer 2008
  • Use super class's address/pointer in initialization list
  • double fork using vfork
  • Convert char pointer (char*) to struct
  • Does anyone have good tips for using pc-lint?
  • C++ How fast is passing around objects?
  • template type's ctor arguments at instantiation time
  • Get list of windows in taskbar on Windows 7?
  • Curl connection options
  • Best cross-platform solution for network server?
  • simple c++ file opening issue
  • Switching from C++ (with a lot of STL use) to C for interpreter building
  • How can I access the JPEG image pixels as a 3D array like we do in MATLAB?
  • What wording in the C++ standard allows static_cast<non-void-type*>(malloc(N)); to work?
  • Avoid allocating in constructor or preserve simplicity (and RAII?)
  • Can C++ raise an error when std array initialization is too small?
  • Reference to end is ambiguous
  • Problem with basic usage of std::enable_if
  • How to print out a decimal number as octal number using setiosflags in C++
  • shadow
    Privacy Policy - Terms - Contact Us © scrbit.com