Tags down


Why references have types even though they are not objects?

By : Walt Ziegler
Date : July 30 2020, 02:00 PM
may help you . The purpose of having typed references (i.e. pointers) is to enable type checking (which helps to catch bugs). If you were to declare a reference as a different type, you will get a type error (you can cast it, but that needs to be done explicitly).
code :

Share : facebook icon twitter icon

Why references to Strings don't behave like other Objects references?

By : user2953512
Date : March 29 2020, 07:55 AM
this will help Object references in Java are passed by value. Assigning just changes the value, it does not alter the original object reference.
In your example arr[0] is changed, but try arr=null and you will see it has no effect after the method has returned.

How can I determine which objects hold references to other objects that are causing memory leaks in objective-c?

By : exfallsburg1
Date : March 29 2020, 07:55 AM
will help you The analyze tool was unable to detect the problem. Using the allocations tool to capture all the reference counts was a start, but there were so many classes I didn't recognize, or access directly, I was not able to track down the problem using this method. Instead, I made a list of the classes that I was directly responsible for, and investigated each of them line by line till I found the problems. The cause was that I used some third party libraries which didn't decrement the retain count of some of my objects as expected. I guess in this case, following better software engineering principles / design patterns, and having thorough code reviews may have caught the problem earlier.

Objective-C would serialize/restore objects with multiple references create duplicate objects?

By : Ieva
Date : March 29 2020, 07:55 AM
hop of those help? Just encode the objects, they are uniquified as they are being written out. From the docs:

Lifetimes and references to objects containing references

By : Sarai Gómez
Date : March 29 2020, 07:55 AM
it helps some times Yes, this error may be confusing but there is a legitimate reason for it.
code :
struct SubImage<'a> {
    image: &'a mut Image<'a>,
    offset: (i32, i32),
    size: (i32, i32),
fn render2<'b, 'a>(image: &'b mut Image<'a>)
fn main() {
    'a: {
        let mut pixel_data: Vec<u8> = Vec::new();
        'b: {
            let mut image: Image<'a> = Image::new(&'a mut pixel_data, (1280, 720));
            render2::<'b, 'a>(&'b mut image);
fn render2<'a>(image: &'a mut Image<'a>)
struct SubImage<'b, 'a:'b> {
    image: &'b mut Image<'a>,
    offset: (i32, i32),
    size: (i32, i32),

PyYAML - Serialize classes (types / class references) that are members of objects

By : Chirag Arora
Date : March 29 2020, 07:55 AM
hope this fix your issue When loading dumped YAML, you normally don't need to preserve the information about which class needs to be instantiated. That is what tag information, stored in the file with !XObj, is for.
If you hide a reference to an object of a certain class, by not dumping the attribute that refers to it, and then run into problems instantiating that object (because you don't know its class) when loading, you are doing something wrong. In that case you should hide the internals of the referenced object, not the attribute that references the object. You could e.g. dump the referenced object using !XObj null.
Related Posts Related Posts :
  • Compiling standard library types
  • Sending argument to an .exe via SHELLEXECUTEINFO
  • Why I can't use i/10 in FOR LOOP, C++?
  • How to use PERF_SAMPLE_READ with mmap
  • Is there any way to iterate through a struct?
  • My character counting code is miscounting characters. Why?
  • Difference between std::resize(n) and std::shrink_to_fit in C++?
  • Wildcard for C++ concepts saying "accepting anything for this template argument"
  • Which of the objects of the class A would be created first in this code snippet?
  • Floating point math accuracy, c++ vs fortran
  • C++ initialize objects with packed array of integers
  • Picking a constructor to call
  • using function call in constructor gives different result c++
  • Using strcpy to copy elements of an char array to another array
  • Templated Constructor Specialization
  • Struggling to convert an integer into a linked list. Not sure what I'm doing wrong here
  • C++: Is it better to store a console output in a macro?
  • C++ - Exception in Constructor
  • AVX: matrix dot vector, but ignore diagonal
  • Pointer To Pointer passed by reference
  • Why is this operator< overload function invisible to STL algorithms?
  • What is the correct algorithm to perform double-float division?
  • In the case of using a std::unique_ptr to automatically deallocate memory upon exiting a scoped block, why not just use
  • C++: Iterating over a string vector and using the index for putenv
  • OpenCL Matrix Multiplication Using std::vector
  • template template parameter deduction: three different compilers three different behaviors
  • C++ pull a card from deck
  • File reading with and without new line
  • store strings in stable memory in c++
  • Why is static_cast used in QT's official document
  • iterator .end() from std::list returns "0xcdcdcdcdcdcdcdcd" but .begin() as expected
  • Is std::sqrt the same as sqrt in C++
  • Iterate through std::initializer_list
  • Codeblocks c++ code doesn't run in VS 19 (vector subscript out of range)
  • Why erase on std::vector promote iterator
  • how to destroy an object in C++
  • How to create Visual Studio 2015 solution from CMake
  • Using concepts for checking if a type T has a field F
  • constructor giving error: no matching function for call to
  • search top n% of a vector member C++
  • Is this reinterpret_cast problematic in principle, and/or in practice?
  • What is the following error doing? I do not see any error with the bounds
  • Two index's of an array have same memory adress
  • how do i avoid integer division in c++?
  • Setting value to enum
  • Properties of a pointer to a zero length array
  • Why the output is different how ever the formula is the same?
  • Restarting from the beginning using do while loops
  • Error: invalid initialization of reference of type
  • how to avoid to use memcpy to create a string
  • Copying the vector elements into std::array
  • Is there any class pointers in Perl in order to access member variables and functions?
  • Why the static variable is not set to 1000
  • Why can't a destructor have reference qualifiers?
  • How to print binary tree in horizontal way?
  • Comparison behavior of ' <' operator
  • Constructors in C++ Language
  • Why displayed value of b , c and y is different from my trace?
  • Undefined reference to `fftw_init_threads' while installing pHash library
  • Reading remapped hdd sectors
  • shadow
    Privacy Policy - Terms - Contact Us © voile276.org