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Dependency Injection in Angular with example
Angular is incredibly effective because it takes use of the Dependency Injection design pattern. Classes, components, and modules can interact while yet remaining consistent under this programming paradigm. As a result, the class changes less frequently. What is Dependency Injection? Dependency injection, a well-known programming concept, is what separates a class from its dependencies. Through the use of dependency injection, dependent objects can be created independently of classes and provided to classes in a variety of other ways. Think about the classes A and B. Assume class A makes use of class B's objects. A class B instance is typically generated in OOPS so that class A can access the objects. We use DI to remove the dependent objects' construction and binding from the class that depends on them. There are often three different categories of courses, namely: - Client Class - The dependent class on the service class is this one. - Service Class - Class that offers the client class the service. - Injector Class - Injects the object from the service class into the client class. Types of Dependency Injection in Angular In Angular, dependency injections come in three different types, and they are as follows: - Constructor injection: Through a class constructor, it gives the dependencies in this case. - Setter injection: The injector injects the dependence into a setter method that is used by the client. - Interface injection: Any client that is provided to the injector method by the dependence will receive the injection of the dependency. A setter method that accepts the dependence must be exposed through an interface that the clients must implement. Benefits of Dependency Injection - loosely coupled - Our Component is currently just loosely connected to the ProductService. The ProductService cannot be created by AppComponent. In reality, it has no knowledge of the ProductService. It only functions with the ProductService that was provided to it. ProductService, BetterProductService, or MockProductService are all acceptable options. The AppComponent is apathetic. - Easily Testable Testing AppComponent is now simpler. Our AppComponent is no longer reliant on a specific ProductService implementation. Any ProductService implementation that is provided to it will function. To pass during testing, simply create a mockProductService Class. - Reusing the Component: It gets simpler to reuse the component. With every ProductService moving forward, our Component will function as long as the interface is respected. Our AppComponent is now tested, maintainable, etc. thanks to the dependency injection technique. But does it fully resolve all of our issues? No, we simply transferred the Problem from the Component to the Component Creator. How can we make a ProductService object and send it to the AppComponent? Angular Dependency Injection accomplishes that. How DI (Dependency Injection) works Take into account the following service, which is produced by: ng g service test import { Injectable } from '@angular/core'; @Injectable({ providedIn: 'root' }) export class TestService { importantValue: number = 42; constructor() { } returnImportantValue() { return this.importantValue; } } As one can see, by including the @Injectable decorator in a class, we may construct injectable dependencies. We include the aforementioned dependent in the component shown below: import { TestService } from './../test.service'; import { Component, OnInit } from '@angular/core'; @Component({ selector: 'app-test', templateUrl: './test.component.html', styleUrls: }) export class TestComponent implements OnInit { value: number; constructor(private testService: TestService) { } ngOnInit() { this.value = this.testService.returnImportantValue(); } } At the top of the page, one can see that we have imported our TestService. The returnImportantValue function of the service was then implemented when we generated an instance inside the function Object() { } of the component. We can see from the aforementioned example how angular offers a fluid approach to inject dependencies in any component.
Conclusion
An excellent, multipurpose framework that accelerates development is Angular. It provides deep linking and dependency injection and is a reliable platform for software development. Read the full article
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Rezdan sang Juara
Event #MSOJ telah berakhir sang juara Rezdan telah dinobatkan. Bagi kalian yang belum mengenal sosok Rezdan kalian bisa mengetahui pribadinya yang baik dan bersahabat melalui hasil wawancara berikut oleh HSID Community Team. Berikut beberapa pertanyaan yang diajukan ke sang juara:
1. Berapa Lama Sudah Bermain Hearthstone?
R: Saya mulai berman hearthstone ngak lama setelah launch, deck pertama berhasil meraih legend adalah face hunter :p
2. Menurut Kamu Bagaimana Turnamen MSOJ kemaren?
R: Saya suka tournament msoj kemarin, standard permainanya cukup tinggi dan eventnya homey jadi seru
3. Untuk Deck yang dibawa ke Turnamen kemaren, deck tersebut dibuat sendiri atau melihat dari sumber2 yang ada di internet? Kalau melihat dari sumber dari internet, sumbernya dari mana?
R: Jaman sekarang deck terbaik sudah punya core cards yang cukup fixed, hanya ada beberapa tech choice slot saja. Dari deck yang kemarin saya bawa, hanya rogue yang cukup beda dari standard decks yang bisa di temukan di hearthpwn ataupun tempostorm. Rogue nya saya copy dari savjz dan itu deck yang sempet berhasil saya gunakin dari 500 legend sampai 15 legend dalam 4 hari
4. Apakah ada tantangan yang membuat anda sulit untuk mengalahkan musuh di Turnamen MSOJ kemarin atau Tidak ada? Kalau ada, jelaskan apa saja tantangan tersebut dan bagaimana cara menghadapinya
R: Tentunya ada tantangan. Ternyata walaupun sudah beberapa kali ikut fireside gathering ataupun online tournament, tetep ada feel yang beda saat berdekatan sama lawan kita dan di tonton banyak orang. Heart rate saya naik sampai beberapa orang bilang mukaku merah hehe. Yang saya bisa lakukan hanya mengingat bahwa setiap game ada hokynya dan take my time and think slowly, jujur lebih banyak mikir setiap turn dibanding ladder. Practice makes perfect, so untuk mengalahkan rasa nervous, ya hanya bisa dengan lebih sering ikut acara tourney :)
5. Boleh minta saran dan tips untuk para player HS di Indonesia supaya muncul bibit – bibit player yang bisa memenangkan turnamen seperti Redzan
R: Hahaha, bibir-bibit player yang bisa menangkan turnamen ya? Apa ya? Kadang di hearthstone dimana kita (Saya) salty saat musuh topdeck the perfect answer ataupun dengan kartu kita ngak merasa ada cara untuk menang, dan rasi itu wajar in my opinion, tapi jangan terlalu lama ingat rasa itu sampai game berikut udah kebawa kesel. If you're not having fun then why play? So next game, forget semua kekesalan and try to start fresh. Coba banyak ngobrol dan tonton orang 'jago' not to learn their play but Why they make a play. Indo juga punya banyak talented players kok
PS: try use a deck tracker hahahaha. Tau kartu (dan possible plays) musuh is half the battle
PPS: always identify your win condition, deck yang aku pilih selalu ada dua possible condition board or burst, recognize kapan kita harus trust in topdeck dan kapan kita masih bisa play from behind
PPS: learn per-matchup mulligan, best mulligan guides on tempostorm metasnapshot - ini related to win condition of matchup with example below:
My Rogue vs (shaman w coin)
Pre mulli: backstab questing tomb
This looks like a good hand right?
No, u rly want something faster than tomb vs shaman, dan perlu 1 drop banget, dan menang board hanya bisa dengan tempo play - so aku cari 1 drop backstab and prep (for tempo swing) dan ngak akan simpan tomb vs shaman diexample ini
Anyway, maaf kalau bahasa aku ada yg salah, dan terimakasih sekali lagi kepada HSID untuk acara MSOJ dan untuk komunitasnya :)
External link:
Deck Warlock klik disini
Deck Shaman klik disini
Deck Rogue klik disini
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