Immutability is the inability to modify data after it has been created. Modifications are instead made by copying the data. A property of immutable data is that it is *referentially transparent*.
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2answers
77 views
Immutable subclass of a Set class
If I'm creating an immutable class from an existing class, should I override methods that mutate the property or have an instance of it and write my own methods to read from the property?
I have an ...
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votes
1answer
91 views
Immutable C++ String class
I have project where I will need to create lots of immutable strings. If I am using std::string, which has huge overhead - about 60-70% against ...
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4answers
114 views
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3answers
176 views
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4answers
419 views
Creating unique registration numbers using object factories
I'm learning about immutability and uniqueness in Java, particularly the use of defensive programming and object factories.
I have been asked to create a class containing an object factory that when ...
5
votes
2answers
236 views
Functions with mutable and non-mutable named tuples
I am making some functions within a function for learning which when passed information about a named tuple: it returns a reference to a class object from which we can construct instances of the ...
8
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2answers
98 views
Inheriting methods of an immutable type
In my project, I have a type BalanceByBucket that is an immutable type and has a bunch of methods.
I have another class called a ...
1
vote
1answer
42 views
Removing getters for a custom enum [closed]
Recently, I perform re-factor on one of my frequent used custom enum, by removing its getter.
My rational for doing so it.
The enum's custom fields are immutable
Only use getters when it is ...
3
votes
2answers
235 views
Immutable Queue in Java using an Immutable Stack
I am new to this Immutability concept and I have some coding experience in JAVA.
Recently as a part of internship program, they gave me a 5-day task, which was to implement Immutable Queue. After some ...
5
votes
3answers
79 views
Generating a game board with squares in a rectangle
I am trying to generate a game board (similar to a Monopoly board). I am new to Scala and am thinking that there may be a better way to do this. But improvements to the code are also welcome.
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6
votes
2answers
158 views
Immutable Linked List in VBA
I made an immutable list class using the head-tail idiom. If I did this correctly, it implements persistent data structures. Unfortunately it doesn't scale well ...
5
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4answers
585 views
2
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3answers
305 views
26
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8answers
3k views
Immutable objects in Java
I just finished studying immutable objects and their advantages so I thought I'd create one of my own. Here is my employee class that extends a person class. It is not mutable since I have getters to ...
3
votes
1answer
120 views
Immutable Matrix
I'm writing implementations of some numerical methods to solve linear equations systems, those implementations use the following Matrix class. I'm trying to get this class immutable, due to that the ...
2
votes
2answers
116 views
Replacing an F# loop over a mutable variable by an immutable approach
Consider:
let mutable m' = m
while m' % i = 0L do
m' <- m' / i
I've refactored it into:
...
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votes
2answers
140 views
Immutable Fraction class
Inspired by this question: Fraction class implemented in Objective-C, I have written what I feel is an improved version of the Fraction class in Objective-C.
As per the tips in this answer, the class ...
3
votes
1answer
159 views
Functional SaveObject in Scala
I came across Java like Scala code that I am trying to refactor to make it functional and immutable. The first obvious flaw is that it's violating thread safety by using mutable public class level ...
6
votes
3answers
10k views
Insert a character into a string
For practicing reasons I would like to write a method which inserts a character into a string.
I would like to know:
What is the best practice concerning placement of a comment within methods? For ...
6
votes
1answer
111 views
Allow changing the properties of a mutable controller in a thread safe way
I have a (control engineering) controller. These controllers usually need several parameters to do their thing, and in my application it is desirable that these parameters can be changed while the ...
5
votes
1answer
590 views
How is my implementation of an immutable stack?
Below is my implementation of an immutable stack class. The reverse function is trying to return a stack with all elements reversed. Is my implementation good? Maybe the reverse function can be ...
4
votes
1answer
416 views
Functional linked list
I'm looking for feedback in general: code correctness, best practices, design patterns; everything you think about this. Is it bad code? Where can it be improved?
I've been implementing functional ...
1
vote
1answer
97 views
Removing redundancy from an immutable “rules class”
I am writing a board game program in Java. Slightly similar to chess or civilization in that each player has a set of units, and each unit has certain actions that it can take.
The base ...
2
votes
1answer
415 views
Creating Proxy classes for immutable objects
As a bit of a learning project, I decided to take the concept of proxying objects a bit further and extend it to creating proxy classes which create proxy'd objects. I originally found the idea of ...
5
votes
1answer
428 views
Immutable C++ stack - thoughts and performance
What are your thoughts on the fallowing immutable stack implementation? It is implemented having as a basis a C# immutable stack (where garbage collector assistance does not impose using a reference ...
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vote
2answers
169 views
6
votes
1answer
200 views
Circular dependencies between immutable objects; the Freeze Pattern
Generally, I structure small threadsafe immutable objects like this:
...
1
vote
2answers
464 views
Comments on my Java pattern for Mutable turned Immutable objects
Commenting omitted to give you the idea. I've been toying with this recently as a variant of the Builder pattern. I've recently fallen in love with immutable objects for the benefits they give in ...
1
vote
2answers
512 views
3
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2answers
661 views
Immutable pure data classes with public setters on properties
I'm putting together some classes as a model for some information (that I'm currently pulling from a website).
The classes are implemented in C# - because in the current version of F# there are no ...