gof | GoF Design Patterns | Architecture library
kandi X-RAY | gof Summary
kandi X-RAY | gof Summary
GoF Design Patterns
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Top functions reviewed by kandi - BETA
- Parses a string and pop operators
- Gets the expression object
- Returns the number
- Checks if symbol is an operator
- Creates a pizza with the specified type
- Removes the pie with a 250 seconds
- Update an observable
- Sets the bid amount
- Sets the new bid position to the given observer
- Updates the bids of an existing bid
- Undoes this empement from a memento
- Get a RaceCar instance from a map key
- Exposes the machine to a usable state
- Clone prototype object
- Move the current cursor to the given location
- Get a clone of a prototype type
- Next pattern
- Creates the handler chain
- Clone document
- Encrypts data using Blowfish
- Creates a pizza with the given type
- Creates a new pizza with the specified type
- Place the order
- Encrypt data using AES - 256
- Generate a wizard
- Construct the house
gof Key Features
gof Examples and Code Snippets
Lines of Code : 19License : Permissive (MIT License)
Copyfunction PriceDiscount() {
this.next = null;
this.setNext = function(fn) {
this.next = fn;
};
this.exec = function(products) {
var result = 0;
var total = products.reduce(function(a, b) {
return a + b;
});
if (tot function Car() {
this.drive = function() {
return "driving";
};
} function Iterator(el) {
this.index = 0;
this.elements = el;
} Community Discussions
Trending Discussions on gof
QUESTION
I am trying to run this reading-text-in-the-wild on Mac M1. When I attempt to run this code
...ANSWER
Answered 2022-Jan-17 at 17:39the package you are using is not compatible with the new mac hardware by the looks of it. You will need to run this using Rosetta 2, which is an apple system component.
QUESTION
The Gang of Four book states the following:
[...] The main relationships in MVC are given by the Observer, Composite and Strategy design patterns.
The best example of this I could find was this github repo, which shows the following class diagram:
I'm particularly interested in the Strategy part of the MVC, where the following holds:
MVC Name GoF Name View Context Controller Strategy ConcreteController ConcreteStrategyRegarding the relationship between View and Controller, The book Head First Design Patterns states the following:
The controller may also ask the view to change. When the controller receives an action from the view, it may need to tell the view to change as a result. For example, the controller could enable or disable certain buttons or menu items in the interface
It also shows an example where the ConcreteController equivalent BeatController) defines an additional association with the ConcreteView equivalent (DJView):
ANSWER
Answered 2022-Feb-15 at 15:40To address one part of your question: the relationship between Context and Strategy in the Strategy pattern. The UML diagram you see in books etc. is just a sample implementation, and this usually shows just the link from Context and Strategy. However the Strategy has to know something about its Context to do its job and this is usually passed as arguments in the method invocation on the Strategy object. When there are many arguments to pass, they may be replaced by passing a reference to the Context object to the Strategy constructor. This decision is an example of 'tailoring a pattern to fit its context'.
QUESTION
I am trying to use Matlab to generate a line graph, but the line terminates at the last point, and doesn't go all the way to the origin. Is there any way to make it so that the line goes beyond the points in code?
I've attached the code that I'm currently using, along with pictures of what the graph looks like right now and how I want it to look.
...ANSWER
Answered 2022-Jan-14 at 08:59Instead of using plot directly on the fit result object, you can call plot with a bit more control and evaluate the result directly for the line
Replace this:
QUESTION
I am trying to upgrade my springboot version from 2.3.4 to 2.6.1. I use query dsl with jpa and apt-maven-plugin. My issue is that I can't no more generate the QClasses when I run maven compile. I noticed that I am no more able to use an older version of querydsl (previous one 4.4.0 and apt-maven-plugin 1.1.3). Now when I try to use the 4.4.0 I have an error :
Non-resolvable import POM: com.querydsl:querydsl-bom:pom:4.4.0 was not found in https://repo.maven.apache.org/maven2
And then when I switch to the 5.0.0 version I have an other error :
[INFO] --- apt-maven-plugin:1.1.3:process (default) @ gof-referentiel-backend --- [WARNING] The artifact org.apache.commons:commons-io:jar:1.3.2 has been relocated to commons-io:commons-io:jar:1.3.2: https://issues.sonatype.org/browse/MVNCENTRAL-244 /home/ezek/Documents/projects/gof-referentiel-backend/src/main/java/fr/ubordeaux/gof/referentiel/common/persistence/dao/impl/ContactDAOImpl.java:12: error: cannot find symbol import fr.ubordeaux.gof.referentiel.common.persistence.entity.QContactEntity; ^ symbol: class QContactEntity location: package fr.ubordeaux.gof.referentiel.common.persistence.entity /home/ezek/Documents/projects/gof-referentiel-backend/src/main/java/fr/ubordeaux/gof/referentiel/common/persistence/dao/impl/ContactDAOImpl.java:29: error: cannot find symbol private static final QContactEntity qContactEntity = QContactEntity.contactEntity;
I get this error for all the classes that use entities. And nothing is generated.
Here is are the relevant values of my pom.xml :
...
ANSWER
Answered 2021-Dec-20 at 18:58It appears you're still (perhaps transitively) relying on some Querydsl 4.0.0 dependencies. You need to remove those (I can't point out which ones, because you didn't include the full POM in your snippet).
I also recommend getting rid of the plugin altogether and instead using the dependency classifier:
QUESTION
I'm trying to make a PCoA plot and after running cmdscale, I want to create a dataframe of the X and Y points for later use and plotting purposes. Below is my code and the error I get:
ANSWER
Answered 2021-Sep-06 at 17:30data_env$Sites is a vector. It has no row names. If you really want the row names, omit $Sites:
QUESTION
How can you remove gof rows from a texreg table? In my specific case, I'd like to remove the R2, Adj. R2, and F statistic rows.
I'm using texreg version 1.37.5 and R version 4.1.1. The default table rows I get from texreg in addition to headings and coefficients are R2, Adj. R2, Num. obs., and RMSE.
The answer here (R texreg: How can I select the gof statistics to be displayed?) is implemented in the code below but does not work. Possibly the package changed in the last few years since this response was posted.
A look at the texreg documentation here, under the omit.coef section, indicates that you can remove gof rows using extract but the link is broken.
SSCCE:
...ANSWER
Answered 2021-Sep-01 at 13:51This answer is based on texreg version 1.37.5.
Observe that the objects are of class lm_robust:
QUESTION
Im reading the book of GoF. Could you please explain the following Advantage:
It limits subclassing. A mediator localizes behavior that otherwise would be distributed among several objects. Changing this behavior requires subclassing Mediator only; Colleague classes can be reused as is.
Is it meant that we should subclass the Mediator or the ConcreteMediator? Can we have more than one ConcreteMediators that inherit form the same Mediator?
...ANSWER
Answered 2021-May-31 at 06:15The book is written in or before 1994, and mainly with examples in C++. Thus, it uses inheritance heavily, partly because C++ allows multiple inheritance, and partly because the language has no separate concept of an interface (like Java or C#).
Early in the book, it states as a goal:
Favor object composition over class inheritance.
Implicit in the book is the understanding that inheritance may not be the best mechanism for reuse.
Consider the example given for the Mediator pattern: the font dialog. Without a Mediator (FontDialogDirector) the ListBox would need to directly know about the EntryField in order to update it about its state change.
A general-purpose ListBox should be useful in many contexts, with or without a collaborating EntryField. Thus, a reusable ListBox class can't know about any 'colleagues', because that would make it non-reusable.
Thus, without a Mediator, you'd need to subclass ListBox to connect it to an EntryField. In pseudo-C# it might look something like this:
QUESTION
I am trying to get the second last value in each row of a data frame, meaning the first job a person has had. (Job1_latest is the most recent job and people had a different number of jobs in the past and I want to get the first one). I managed to get the last value per row with the code below:
first_job <- function(x) tail(x[!is.na(x)], 1)
first_job <- apply(data, 1, first_job)
...ANSWER
Answered 2021-May-11 at 13:56You can get the value which is next to last non-NA value.
QUESTION
I'm learning Java design patterns by "Patterns in Java", volume 1 by Mark Grand (Factory Method specifically). My point is to highlight difference between closest patterns for myself. There are good answers that clarify the difference between Factory Method and Abstract Factory (Design Patterns: Factory vs Factory method vs Abstract Factory, What is the basic difference between the Factory and Abstract Factory Design Patterns?). But I noticed that most of authors mean some other interpretation of Factory Method compared to one I have read in "Patterns in Java". The interpretation from the answers is closer to Factory Method from GoF book.
GoF interpretation:
To be specific I will describe what in my opinion is a key difference between Grand's and GoF interpretations. The source of polymorphism in GoF interpretation is inheritance: different implementations of Creator create different types of Products. The source of polymorphism in Mark Grand interpretations apparently is "data-driven class determination" (example from book):
ANSWER
Answered 2021-Feb-26 at 21:19Question #1.
- No.
- No.
- Sometimes UML obfuscates a thing more than it clarifies a thing.
Question #2.
- I only see one factory interface in the Grand picture. I don't see a separate interface.
- ?
- Yes. And no.
Question #3. No.
Question #4. No.
I'm not as up on my GoF patterns as I used to be, but I'll take a shot at this. I think you are correct about the difference. The GoF pattern uses inheritance for polymorphism and Grand's example uses conditional logic for polymorphism.
The operational difference is that to add a new type in Grand's example, I would modify the method createImage:
QUESTION
Don't angry with me. I am new in c++ and qt I have used singleton calss following the example from Gof But get Error
...ANSWER
Answered 2021-Jan-21 at 07:30Your solution is:
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You can use gof like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the gof component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .
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