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1. stackoverflow.com › questions › 214714oop - Mutable vs immutable objects - Stack Overflow

   stackoverflow.com › questions › 214714

   Nov 2, 2018 · If a class type is mutable, a variable of that class type can have a number of different meanings. For example, suppose an object foo has a field int[] arr, and it holds a reference to a int[3] holding the numbers {5, 7, 9}. Even though the type of the field is known, there are at least four different things it can represent:

2. www.geeksforgeeks.org › c-mutable-keywordC++ mutable keyword - GeeksforGeeks

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   Feb 13, 2022 · The mutable storage class specifier in C++ (or use of mutable keyword in C++) auto, register, static and extern are the storage class specifiers in C. typedef is also considered as a storage class specifier in C. C++ also supports all these storage class specifiers. In addition to this C++, adds one important storage class specifier whose name ...

3. stackoverflow.com › questions › 105014c++ - Does the 'mutable' keyword have any purpose other than ...

   stackoverflow.com › questions › 105014

   Mutable changes the meaning of const from bitwise const to logical const for the class. This means that classes with mutable members are longer be bitwise const and will no longer appear in read-only sections of the executable. Furthermore, it modifies type-checking by allowing const member functions to change mutable members without using ...

4. softwareengineering.stackexchange.com › questionsUnderstanding the difference between mutable and immutable ...

   softwareengineering.stackexchange.com › questions

   Oct 11, 2013 · In C++ there is a distinction between "logically immutable" and "formally immutable". A class can have "mutable" members. Say I have a "Person" class that takes its data from a database, but caches them. So if the name in the database is "John Smith", that is the logical name.

5. softwareengineering.stackexchange.com › questionsWhat is State, Mutable State and Immutable State?

   softwareengineering.stackexchange.com › questions

   Apr 21, 2015 · The most common implementation is to store the state of an entity in some kind of variables (global variables, object member variables), i.e. to store the of a state. Mutable state is then implemented using assignment: each assignment operation replaces the previous snapshot with a new one.

6. en.cppreference.com › w › cppC++ keyword: mutable - cppreference.com

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   Aug 14, 2024 · lambda-declarator that removes const qualification from parameters captured by copy (since C++11) [] See als

7. People also ask

   What is a mutable object?

   • See a definition of (im)mutable for more information: In object-oriented and functional programming, an immutable object is an object whose state cannot be modified after it is created. This is in contrast to a mutable object, which can be modified after it is created. A mutable class is one that can change its internal state after it is created.

   What is a "Mutable class" in OOP? - Stack Overflow

   stackoverflow.com/questions/3554192/what-is-a-mutable-class-in-oop

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   How do you know if an object is mutable?

   • An object instance is mutable if there is any possible (*) means via which the state encapsulated thereby might be modified. An object instance is immutable if its state cannot possibly be changed. An class is immutable if all instances of that class are guaranteed to be immutable, regardless of who might hold references to them.

   java - Understanding the difference between mutable and immutable

   softwareengineering.stackexchange.com/questions/214167/understanding-the-difference-between-mutable-and-immutable-classes

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   Which storage class specifier is mutable in C++?

   • auto, register, static and extern are the storage class specifiers in C. typedef is also considered as a storage class specifier in C. C++ also supports all these storage class specifiers. In addition to this C++, adds one important storage class specifier whose name is mutable. What is the need of mutable?

   C++ mutable keyword - GeeksforGeeks

   www.geeksforgeeks.org/c-mutable-keyword/

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   What if a class type is mutable?

   • If a class type is mutable, a variable of that class type can have a number of different meanings. For example, suppose an object foo has a field intarr, and it holds a reference to a int holding the numbers {5, 7, 9}. Even though the type of the field is known, there are at least four different things it can represent:

   oop - Mutable vs immutable objects - Stack Overflow

   stackoverflow.com/questions/214714/mutable-vs-immutable-objects

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   What is the difference between logically immutable and formally mutable in C++?

   • In C++ there is a distinction between "logically immutable" and "formally immutable". A class can have "mutable" members. Say I have a "Person" class that takes its data from a database, but caches them. So if the name in the database is "John Smith", that is the logical name.

   java - Understanding the difference between mutable and immutable

   softwareengineering.stackexchange.com/questions/214167/understanding-the-difference-between-mutable-and-immutable-classes

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   What is mutable in Java?

   • Mutable is used when you have a variable inside the class that is only used within that class to signal things like for example a mutex or a lock. This variable does not change the behaviour of the class, but is necessary in order to implement thread safety of the class itself.

   c++ - Does the 'mutable' keyword have any purpose other than allowin…

   stackoverflow.com/questions/105014/does-the-mutable-keyword-have-any-purpose-other-than-allowing-a-data-member-to

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8. algodaily.com › lessons › understanding-mutable-vsUnderstanding Mutable vs. Immutable Objects - AlgoDaily

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   An immutable object's states and behaviors cannot be changed once it is created, while a mutable object's states and behaviors can be changed after its creation. Instances of immutable classes are unchangeable once they are created due to their restricted access and lack of set methods.