Paolo  Hudson

Paolo Hudson

1602490763

Using Builder Design Pattern in Swift

As a developer, we should always follow a design principle that acts as a guide to structuring our code so that it is modular, easy to read, easy to understand, and scalable. In this article, I will be discussing behavioral design pattern, how to use them, and their implementation in Swift. Read on!

Categories of Desing Pattern

Design Pattern falls mainly under the following categories

1. Creational

2. Structural

3. Behavioral

In this article, we will cover the Builder Designer Pattern which is a type of Creational Design Pattern

Builder Design Pattern

Why?

We create objects for our classes to leverage the functionality a class provides. Sometimes object creation is simple and can be done by the simple initializer. Other objects might have complicated requirements, for eg, it may require a lot of arguments to initialize the object, which in my opinion is too cumbersome and non-productive. Also, we might need to mix and match these params for initialization. In these cases, we should go for piecewise initialization/construction. For accomplishing that we need an implementation that provides us a step-by-step mechanism so that we have an easier API way of accessing things with granular control of object creation version.

Let’s take an example to understand. Say we want to make an object APIRequest class for our recipe app. This class helps us create request objects to make different API requests. For starters, the current API request class helps us create objects with only two params.

enum Endpoint:String {

case receipesUrl = "/recipes"
case receipeDetail = "/recipes/id"
}
class ApiRequest {
var endpoint:Endpoint
init(endPoint:Endpoint) {
self.endpoint = endPoint
}
}
var apiRequest = ApiRequest(endPoint: .receipesUrl)

Now say you want to pass it in the Http method (POST, GET, etc), headers, URL params, etc. So let’s say we add more parameters to our initializer which may look like this now.

enum HTTPMethod:String {

case get = "GET"
case post = "POST"
}
enum Endpoint:String {
case receipesUrl = "/recepies"
case receipeDetail = "/recepies/id"
}
class ApiRequest {
var endpoint:Endpoint
var urlParams:[String:String]
var httpMethod:HTTPMethod
var headers:[String:String]
init(endPoint:Endpoint, httpMethod:HTTPMethod, headers:[String:String], urlParams:[String:String]) {
self.endpoint = endPoint
self.httpMethod = httpMethod
self.headers = headers
self.urlParams = urlParams
}
}
var apiRequest = ApiRequest(endPoint: .receipesUrl, httpMethod: .get, headers: [:],urlParams: [:])

As you can see now our initializer has started to grow up. We still need to add a bunch of more parameters like search params, HTTP scheme(HTTP or HTTPS), path parameters, payload, filters, etc. With so many parameters this will become very ugly, plus we then have to handle passing the different params for the initialization which we might not need. We could have a default value or make some of the params optional but still, it is not ideal.

#swift #mobile-apps #programming #developer

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Using Builder Design Pattern in Swift
Samanta  Moore

Samanta Moore

1623835440

Builder Design Pattern

What is Builder Design Pattern ? Why we should care about it ?

Starting from **Creational Design Pattern, **so wikipedia says “creational design pattern are design pattern that deals with object creation mechanism, trying to create objects in manner that is suitable to the situation”.

The basic form of object creations could result in design problems and result in complex design problems, so to overcome this problem Creational Design Pattern somehow allows you to create the object.

Builder is one of the** Creational Design Pattern**.

When to consider the Builder Design Pattern ?

Builder is useful when you need to do lot of things to build an Object. Let’s imagine DOM (Document Object Model), so if we need to create the DOM, We could have to do lot of things, appending plenty of nodes and attaching attributes to them. We could also imagine about the huge XML Object creation where we will have to do lot of work to create the Object. A Factory is used basically when we could create the entire object in one shot.

As **Joshua Bloch (**He led the Design of the many library Java Collections Framework and many more) – “Builder Pattern is good choice when designing the class whose constructor or static factories would have more than handful of parameters

#java #builder #builder pattern #creational design pattern #design pattern #factory pattern #java design pattern

Joseph  Murray

Joseph Murray

1624443360

Builder design pattern — java

Definition of Builder Pattern

The builder pattern is a design pattern that allows for the step-by-step creation of complex objects using the correct sequence of actions. The construction is controlled by a director object that only needs to know the type of object it is to create.

Where to use the builder pattern?

When you have a simple object, this pattern is not very useful, but when you begin to have a more complex object and want to have a clear code you can use it without hesitation

#tutorial #design-patterns #coding #java #builder-pattern #builder design pattern — java

Juned Ghanchi

1621315250

Designing Mobile Apps using the latest UI Design Principles

The mobile technology world is growing at the speed of light, and the apps have become an integral part of our daily life. We can now see an influx of technology with tools that can help create mobile apps. All of them are becoming more accessible and hence people are getting on their first app making journeys. Since the mobile app industry is getting bigger and better than ever, businesses from all corners of the world are trying to develop mobile apps for their operations and marketing. Designing a mobile app for businesses is the first step, though. Company owners are in charge of the basic look and feel of the designed product. With a brilliant mobile app design, one can establish a relationship between app and user very well.

Read Blog Here: https://www.indianappdevelopers.com/blog/designing-mobile-apps-using-latest-ui-design-principles/

#designing mobile apps #ui design principles #mobile ui design #mobile app design #ui design #app design

Joseph  Murray

Joseph Murray

1624442940

Prototype Design Pattern - Java

Prototype design pattern tutorial

Definition of Prototype pattern

The prototype pattern is a creational design pattern in software development. It is used when the type of objects to create is determined by a prototypical instance, which is cloned to produce new objects.

Where to use the Prototype pattern

If the cost for creating a new object is expensive and costs resources.

#java #design-patterns #code #tutorial #prototype-design-pattern #design pattern

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#nature landscapes website design #landscapes website design #website design #website designing #website designer #designer