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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8answers
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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 ...
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votes
1answer
49 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 ...
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2answers
55 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
1answer
73 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 ...
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vote
1answer
98 views
Converting object oriented style code to functional 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 ...
5
votes
2answers
3k 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
99 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
296 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
255 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
84 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 ...
5
votes
1answer
301 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
138 views
6
votes
1answer
150 views
Circular dependencies between immutable objects; the Freeze Pattern
Generally, I structure small threadsafe immutable objects like this:
...
1
vote
2answers
344 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 ...
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vote
2answers
425 views
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2answers
511 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 ...
