Composition is the process of combining, or composing, parts of a program into a larger program.
Questions tagged [composition]
1737 questions
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2 answers
Should I use inheritance or composition in my case?
I'm creating a class which shares common codes with another class and am not sure which pattern I should use. The class I've already have:
public class TeamA{
private static final Logger LOGGER = Logger.getLogger(TeamA.class);
@Autowired
…
user959704
0
votes
2 answers
compose objects without initializing objects that are not in hash
I am trying to compose an object Transaction from objects TranFee and Rate.
class Transaction
attr_reader :tranfee, :rate
def initialize(hash)
@tranfee = PaymentType::TranFee.new(hash)
@rate = PaymentType::Rate.new(hash)
…
heinztomato
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Object Oriented Modelling Advice
hoping for a bit of guidance with modelling decisions for an RoR app I’m planning to build. It’ll be a rental platform hosting with multiple rental vendors. I'm supposing the following classes and or modules and my question is about modelling,…
jbk
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2 answers
Scala Play Action Composition : Declare ActionBuilder that produces Action by combining several ActionFunction
I'm trying to wrap my head around Play action composition. My primary reference is: https://www.playframework.com/documentation/2.3.6/ScalaActionsComposition
Here's what I want to achieve (to be able to declare a function in my Controller this…
Cokorda Raka
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3 answers
Is it good design to explicitely distinguish immutable and mutable parts of an object?
Let's think about this class, where ImmutablePart is an immutable pure data Object :
public class Clazz1 {
private final ImmutablePart immu ;
private String f1;
private boolean f2;
private int f3;
/** some constructor…
Jules Sam. Randolph
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1 answer
Class composition - can't convert from 'int' to class
I'm learning about class composition but I'm having a hard time understanding how the syntax works. I have two classes, Time and Date, and Date is composed with a Time object. I can't get the Date constructor to work correctly - there is a…
Sabien
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How to represent forum's relationship in Class diagram
I'm trying to make class diagram for a simple forum and i don't understand how to represent it.
Here's what i did:
Firstly, I don't understand how to make relationship between users,posts and threads.
Secondly, is inheritance right choice or…
ma1169
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1 answer
Does the delegate pattern break encapsulation?
Lets say I have a class that takes a delegate:
public class DelegateContainer
{
private IDelegate delegate;
public DelegateContainer(IDelegate delegate)
{
this.delegate = delegate;
}
public void doSomething()
{
…
Jonathan
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Microsoft.Composition. What does the WithDefaultConventions method do?
Supposing I have a method GetAssemblies, which returns a list of assemblies, and a method called GetConventions, which returns a ConventionBuilder, I might compose my container like this:
CompositionHost container =
new ContainerConfiguration()
…
bornfromanegg
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How can I achieve this kind of relationship (inheritance, composition, something else)?
I would like to set up a foundation of classes for an application, two of which are person and student. A person may or may not be a student and a student is always a person. The fact that a student “is a” person led me to try inheritance, but I…
Tim
- 97
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2 answers
Passing a string in where clause in Rails is always quoted
I'm trying to compose programmatically the .where() clause.
It looks like
Post.where("description ?", @composite)
Where @composite is a string which is constructed before. It may be something like = 'ABCD' or maybe IS LIKE 'ABCD' etc.
Problem is in…
valk
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1 answer
Rails 1.0 - Using composed_of gives me a wrong number of arguments (1 for 5) error
I am developing a Rails 1.0 application (I can't upgrade, it's a strange situation) for which I am trying to use the :composed_of functionality. I have a class called StreetAddress:
class StreetAddress
attr_reader :address, :address2, :city,…
Tristan Havelick
- 67,400
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Verifying Composition Method algorthm for Random Variable generation
I´m working on implementing the composition method algorithm that states the following:
Composition Approach
Another method for generating rando variables is the composition approach. Suppose that X has CDF (Cumulative Distribution Function) Fx and…
Pablo Estrada
- 3,182
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C++ Object Composition and Separate Compilation
When I write C++ code I often try to limit the amount of header files that I have to #include, because it keeps compilation time smaller and also prevent unnecessary recompilation of compilation units when part of my program changes.
On the other…
skuld
- 149
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Prism region behaviours and MEF
I have a question on which, AFAIK information is scarce.
In the StockTrader RI provided by Microsoft there is a definition for a AutoPopulateExportedViewsBehavior, the purpose of which I seem to grasp.
However, this behaviour is declared with an MEF…
Kris
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