in these slides i have explained the difference between MVC, MVP and MVVM design patterns. slides includes definition, explanation and then implementation with code examples. it is a comparison oriented presentation.
The Model View ViewModel (MVVM) is an architectural pattern originated by Microsoft as a specialization of the Presentation Model (Martin Fowler). Similar to MVC, MVVM is suitable for client applications (Xaml-based, Xamarin, SPA, ...) because it facilitates a clear separation between the UI and the Business Logic. Examples with WPF, MvvmCross, AngularJs. It also contains solutions for common use cases.
General overview of Model View Controller design pattern for software architecture. Gives simple examples and also more complex examples using Spring MVC framework.
The Model View ViewModel (MVVM) is an architectural pattern originated by Microsoft as a specialization of the Presentation Model (Martin Fowler). Similar to MVC, MVVM is suitable for client applications (Xaml-based, Xamarin, SPA, ...) because it facilitates a clear separation between the UI and the Business Logic. Examples with WPF, MvvmCross, AngularJs. It also contains solutions for common use cases.
General overview of Model View Controller design pattern for software architecture. Gives simple examples and also more complex examples using Spring MVC framework.
MVVM or Model - View - ViewModel is a design pattern aimed for modularising your code and build it on a Test Driven Development environment. When Apple's traditional MVC design pattern makes our controllers bulky and our unit tests painful, different design patterns such as MVVM, VIPER, MVP, etc come to our rescue. MVVM comes quite handy as it provides a loosely coupled mechanism between all components segregating your view, business and data logic.
ASP.NET Core is a significant redesign of ASP.NET. This topic introduces the new concepts in ASP.NET Core and explains how they help you develop modern web apps.
This ppt tells about struts in java. All the methods and brief knowledge of struts. For more info about struts and free projects on it please visit : http://s4al.com/category/study-java/
This presentation is about Spring MVC. Topics covered in this session are:
1. HTTP Servlet
2. What is Spring MVC?
3. MVC Architecture
4. Request Processing Workflow in Spring MVC
5. Spring Web Application Context
6. Spring MVC Configuration
7. Important Annotations
Models used in iOS programming, with a focus on MVVMAndrei Popa
I have hopefully tried here to gather some useful stuff about MVVM which is the "proper" way to build a highly decoupled app in iOS today, a model that makes use of ReactiveCocoa as binding solution.
MVVM or Model - View - ViewModel is a design pattern aimed for modularising your code and build it on a Test Driven Development environment. When Apple's traditional MVC design pattern makes our controllers bulky and our unit tests painful, different design patterns such as MVVM, VIPER, MVP, etc come to our rescue. MVVM comes quite handy as it provides a loosely coupled mechanism between all components segregating your view, business and data logic.
ASP.NET Core is a significant redesign of ASP.NET. This topic introduces the new concepts in ASP.NET Core and explains how they help you develop modern web apps.
This ppt tells about struts in java. All the methods and brief knowledge of struts. For more info about struts and free projects on it please visit : http://s4al.com/category/study-java/
This presentation is about Spring MVC. Topics covered in this session are:
1. HTTP Servlet
2. What is Spring MVC?
3. MVC Architecture
4. Request Processing Workflow in Spring MVC
5. Spring Web Application Context
6. Spring MVC Configuration
7. Important Annotations
Models used in iOS programming, with a focus on MVVMAndrei Popa
I have hopefully tried here to gather some useful stuff about MVVM which is the "proper" way to build a highly decoupled app in iOS today, a model that makes use of ReactiveCocoa as binding solution.
Using mvvm inside mvc in domain driven designyashar Aliabasi
Combining MVVM and MVC for reaching to best practice is this article's purpose. MVVM was desktop application's pattern for coupling UI from Business and MVC is nowadays trend in web applications.
If you’re a mobile developer then you heard about MVVM design pattern and how Google supporting it recently in android after a long time not supporting any design pattern in this presentation we will discuss what difference in MVVM than other famous design patterns and why is preferable to use it in your work.
Mobile App Architectures & Coding guidelinesQamar Abbas
Better coding guidelines and application architectures
SOLID principles by Uncle Bob
Model View Controller
Model View Presenter,
Model View ViewModel
Best practices for Android developers
Best practices for iOS developers
Download original slides http://bit.ly/2HNCcMX
in these slides i have explained the Abstract Factory Design pattern. slides includes definition, explanation and then implementation by code examples.
OOP - Understanding association, aggregation, composition and dependencyMudasir Qazi
In these slides i have tried to explains some confusing topics in object oriented programming like association, aggregation, composition and dependency. it's also a comparison oriented presentation.
In these slide i have tried to explains an interesting topic of programming, which is always a topic of discussion among programmers that is "variables and objects are passed-by-value or passed-by-reference in Java?" These slides will prove that Java is completely pass-by-value thing. There is nothing like pass-by-reference in Java.
In these slides i have explained an important design pattern that is "singleton pattern".
slides includes everything required about it, from definition to implementation and also different ways to achieve it according to situation and requirements.
in these slides i have explained the Observer design pattern. slides includes the complete definition, explanation and then implementation with code examples.
in these slides i have explained the factory method design pattern. slides contains complete notes on this pattern from definition to implementation by code example.
Design Pattern - Chain of ResponsibilityMudasir Qazi
in these slides i have explained the Chain of Responsibility design pattern. slides includes definition, explanation and then implementation by code examples.
Water billing management system project report.pdfKamal Acharya
Our project entitled “Water Billing Management System” aims is to generate Water bill with all the charges and penalty. Manual system that is employed is extremely laborious and quite inadequate. It only makes the process more difficult and hard.
The aim of our project is to develop a system that is meant to partially computerize the work performed in the Water Board like generating monthly Water bill, record of consuming unit of water, store record of the customer and previous unpaid record.
We used HTML/PHP as front end and MYSQL as back end for developing our project. HTML is primarily a visual design environment. We can create a android application by designing the form and that make up the user interface. Adding android application code to the form and the objects such as buttons and text boxes on them and adding any required support code in additional modular.
MySQL is free open source database that facilitates the effective management of the databases by connecting them to the software. It is a stable ,reliable and the powerful solution with the advanced features and advantages which are as follows: Data Security.MySQL is free open source database that facilitates the effective management of the databases by connecting them to the software.
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
NUMERICAL SIMULATIONS OF HEAT AND MASS TRANSFER IN CONDENSING HEAT EXCHANGERS...ssuser7dcef0
Power plants release a large amount of water vapor into the
atmosphere through the stack. The flue gas can be a potential
source for obtaining much needed cooling water for a power
plant. If a power plant could recover and reuse a portion of this
moisture, it could reduce its total cooling water intake
requirement. One of the most practical way to recover water
from flue gas is to use a condensing heat exchanger. The power
plant could also recover latent heat due to condensation as well
as sensible heat due to lowering the flue gas exit temperature.
Additionally, harmful acids released from the stack can be
reduced in a condensing heat exchanger by acid condensation. reduced in a condensing heat exchanger by acid condensation.
Condensation of vapors in flue gas is a complicated
phenomenon since heat and mass transfer of water vapor and
various acids simultaneously occur in the presence of noncondensable
gases such as nitrogen and oxygen. Design of a
condenser depends on the knowledge and understanding of the
heat and mass transfer processes. A computer program for
numerical simulations of water (H2O) and sulfuric acid (H2SO4)
condensation in a flue gas condensing heat exchanger was
developed using MATLAB. Governing equations based on
mass and energy balances for the system were derived to
predict variables such as flue gas exit temperature, cooling
water outlet temperature, mole fraction and condensation rates
of water and sulfuric acid vapors. The equations were solved
using an iterative solution technique with calculations of heat
and mass transfer coefficients and physical properties.
Forklift Classes Overview by Intella PartsIntella Parts
Discover the different forklift classes and their specific applications. Learn how to choose the right forklift for your needs to ensure safety, efficiency, and compliance in your operations.
For more technical information, visit our website https://intellaparts.com
Harnessing WebAssembly for Real-time Stateless Streaming PipelinesChristina Lin
Traditionally, dealing with real-time data pipelines has involved significant overhead, even for straightforward tasks like data transformation or masking. However, in this talk, we’ll venture into the dynamic realm of WebAssembly (WASM) and discover how it can revolutionize the creation of stateless streaming pipelines within a Kafka (Redpanda) broker. These pipelines are adept at managing low-latency, high-data-volume scenarios.
We have compiled the most important slides from each speaker's presentation. This year’s compilation, available for free, captures the key insights and contributions shared during the DfMAy 2024 conference.
Hierarchical Digital Twin of a Naval Power SystemKerry Sado
A hierarchical digital twin of a Naval DC power system has been developed and experimentally verified. Similar to other state-of-the-art digital twins, this technology creates a digital replica of the physical system executed in real-time or faster, which can modify hardware controls. However, its advantage stems from distributing computational efforts by utilizing a hierarchical structure composed of lower-level digital twin blocks and a higher-level system digital twin. Each digital twin block is associated with a physical subsystem of the hardware and communicates with a singular system digital twin, which creates a system-level response. By extracting information from each level of the hierarchy, power system controls of the hardware were reconfigured autonomously. This hierarchical digital twin development offers several advantages over other digital twins, particularly in the field of naval power systems. The hierarchical structure allows for greater computational efficiency and scalability while the ability to autonomously reconfigure hardware controls offers increased flexibility and responsiveness. The hierarchical decomposition and models utilized were well aligned with the physical twin, as indicated by the maximum deviations between the developed digital twin hierarchy and the hardware.
1. MVC, MVP and MVVM Design
Patterns
A comparison
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2. Contents / Agenda
• Separation of Concerns
• MVC
• Definition and Architecture
• Explanation of Modules
• Sequence Diagram
• Advantages and Disadvantages
• MVP
• Definition and Architecture
• Explanation of Modules
• Sequence Diagram
• Advantages and Disadvantages
• MVVM
• Definition and Architecture
• Explanation of Modules
• Sequence Diagram
• Advantages and Disadvantages
• Summary (a comparison of all three patterns)
• One Last Tip
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3. Separation of Concerns
• All these methods do only one thing “Separation of Concerns” or
“Layered Architecture” but in their own way.
• All these concepts are pretty old, like idea of MVC was tossed in
1970s.
• All these patterns forces a separation of concerns, it means domain
model and controller logic are decoupled from user interface (view).
As a result maintenance and testing of the application become
simpler and easier.
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5. Explanation of Modules
Model:
• The Model represents a set of classes that describe the business logic i.e.
business model as well as data access operations i.e. data model. It also defines
business rules for data means how the data can be changed and manipulated.
View:
• The View represents the UI components like CSS, jQuery, html etc. It is only
responsible for displaying the data that is received from the controller as the
result. This also transforms the model(s) into UI.
Controller:
• The Controller is responsible to process incoming requests. It receives input from
users via the View, then process the user's data with the help of Model and
passing the results back to the View. Typically, it acts as the coordinator between
the View and the Model. There is One-to-Many relationship between Controller
and View, means one controller can handle many views.
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7. Advantages of MVC
• Since MVC handles the multiple views using the same enterprise model it is
easier to maintain, test and upgrade the multiple system.
• It will be easier to add new clients just by adding their views and
controllers.
• Since the Model is completely decoupled from view it allows lot of
flexibilities to design and implement the model considering reusability and
modularity. This model also can be extended for further distributed
application.
• It is possible to have development process in parallel for model, view and
controller.
• This makes the application extensible and scalable.
• It is really effective with Microsoft’s ASP.Net and Entity Framework.
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8. Disadvantages of MVC
• Requires high skilled experienced professionals who can identify the
requirements in depth at the front before actual design.
• It requires the significant amount of time to analyze and design.
• This design approach is not suitable for smaller applications.
• In case of complicated user interface with states of views related to each
other and
• Possible workflow models, this information though not business
functionality related
• Has to be in the Model layer. In very large systems this may be beneficial,
otherwise it is usually transferred to the control layer, somewhat breaching
the pattern.
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9. MVP Pattern
Model-View-Presenter (MVP) is a variation of the Model-View-
Controller (MVC) pattern but specifically geared towards a page event
model.
The primary differentiator of MVP is that the Presenter implements an
Observer design of MVC but the basic ideas of MVC remain the same:
the model stores the data, the view shows a representation of the
model, and the presenter coordinates communications between the
layers.
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11. Explanation of Modules
Model:
The model in MVP is just the same, that is described earlier in the Model-View-
Controller pattern.
Presenter:
The Presenter’s responsibility is to handle user input and use this to manipulate the
model data. The interactions of the User are first received by the view and then
passed to the presenter for interpretation. Often, a presenter will maintain a
selection that identifies a range of data in the model that is current, and the
gestures received from the view will be used to act on this. There is One-to-One
relationship between View and Presenter, means each view will be handled by one
presenter.
View:
When the model is updated, the view also has to be updated to reflect the
changes. View updates can be handled in several ways.
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12. Passive view and Supervising Controller
• The Model-View-Presenter variants, Passive View and Supervising
Controller, specify different approaches to implementing view updates.
• In Passive View, the presenter updates the view to reflect changes in the
model. The interaction with the model is handled exclusively by the
presenter. The view is not aware of changes in the model.
• In Supervising Controller, the view interacts directly with the model to
perform simple data-binding that can be defined declaratively, without
presenter intervention. The presenter updates the model; it manipulates
the state of the view only in cases where complex UI logic that cannot be
specified declaratively is required. .NET Data-binding technologies make
this approach more appealing for many cases, although if not carefully
designed it may result in coupling between view and model.
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14. Advantages of MVP
• As with Model-View-Controller, Model-View-Presenter has the advantage that it
clarifies the structure of our user interface code and can make it easier to
maintain.
• Not only do we have our data taken out of the View and put into the Model, but
also almost all complex screen logic will now reside in the Presenter.
• We have almost no code in our View apart from screen drawing code Model-
View-Presenter also makes it theoretically much easier to replace user interface
components, whole screens, or even the whole user interface (Windows Forms to
WPF for example).
• This makes the user opinion sensitive UI part perfectly separate of other parts of
the application, hence it’s features can be enhanced separately with more
involvement from the customer.
• In addition unit testing the user interface becomes much easier as we can test
the logic by just testing the Presenter.
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15. Disadvantages of MVP
• Requires high skilled experienced professionals who can identify the
requirements in depth at the front before actual design.
• It requires the significant amount of time to analyze and design.
• This design approach is not suitable for smaller applications. It overkills the
small applications.
• It can be hard to debug events being fired in active Model-View-Presenter.
• The Passive View version of Model-View-Presenter can lead to a certain
amount of boilerplate code having to be written to get the interface into
the View to work.
• In both MVP and MVC cases the code for supporting the proper pattern
implementation can be complex, hence it is not advised to use in smaller
projects.
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16. MVVM Pattern
• The Model-View-ViewModel (MVVM or ViewModel) is a pattern for
separating concerns in technologies that use data-binding.
• The first two pattern the MVC and MVP does not work as well as
MVVM in declarative user interfaces like Windows Presentation
Foundation or Silverlight because the XAML that these technologies
use can define some of the interface between the input and the view
(because data binding, triggers, and states can be declared in XAML).
• The MVVM pattern is an adaptation of the MVC and MVP patterns in
which the view model provides a data model and behavior to the
view but allows the view to declaratively bind to the view model.
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19. Explanation of Modules
Model:
The model is especially important because it wraps the access to the data, whether
access is through a set of Web services, an ADO.NET Data Service, or some other
form of data retrieval. The model is separated from the view model so that the
view's data (the view model) can be tested in isolation from the actual data.
View:
The pattern we use is to set the Data Context of a view to its ViewModel. The view
classes have no idea that the model classes exist, while the ViewModel and model
are unaware of the view. In fact, the model is completely oblivious to the fact that
the ViewModel and view exist. A View is the actual UI behind a view in the
application. The elements of the UI are implemented in XAML, and as a result of
this the code behind file contains minimal code, or in some cases it does not
contain code at all, however it is different in Silverlight and WPF.
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20. Continued…
ViewModel:
A ViewModel is a model for a view in the application as shown by its name. It
has a collection which contain the data from the model currently needed for
the view. Unlike the Presenter in MVP, a ViewModel does not need a
reference to a view. The view binds to properties on a ViewModel, which, in
turn, exposes data contained in model objects and other state specific to the
view. The bindings between view and ViewModel are simple to construct
because a ViewModel object is set as the Data Context of a view. If property
values in the ViewModel change, those new values automatically propagate
to the view via data binding. When the user clicks a button in the View, a
command on the ViewModel executes to perform the requested action. The
ViewModel, never the View, performs all modifications made to the model
data.
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22. Advantages of MVVM
• Reduces the amount of code in the View’s code behind file.
• UI elements can be written in XAML
• Strong Data Binding, which saves a lot of code. No need for manually
refresh the view.
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23. Disadvantages of MVVM
• In bigger cases, it can be hard to design the ViewModel up front in
order to get the right amount of generality.
• Data-binding for all its wonders is declarative and harder to debug
than nice imperative stuff where you just set breakpoints.
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26. Last Word
• Must note the difference between the event responses of all patterns
in Sequence diagram. It clears the confusion about the response of
user input.
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