Author Archives: Arun CP

What are higher order functions in swift ?

By | February 28, 2024

Higher-order functions in Swift are functions that take other functions as parameters or return functions as output. They enable a functional programming style by allowing you to compose functions, pass behavior as arguments, and manipulate collections with concise and expressive code. Here are some common higher-order functions in Swift with examples: map(_:): filter(_:): reduce(_:combine:): sorted(by:):… Read More »

How to setup a basic core data stack in swift?

By | February 22, 2024

Setting up a Core Data stack in Swift involves several steps, including creating a managed object model, setting up a persistent store coordinator, managed object context, and other components. Here’s a basic guide to setting up a Core Data stack in Swift: Create a Data Model: Generate NSManagedObject Subclasses: Initialize the Persistent Store Coordinator: Managed… Read More »

What is enum associated values in swift?

By | February 15, 2024

In Swift, enumerations (enums) are powerful constructs that allow you to define a group of related values. Associated values in Swift enums enhance their flexibility by enabling each enum case to carry additional data of varying types. This feature allows you to model more complex data structures and behaviors with enums. Here’s how you can… Read More »

What is protocol oriented programming in swift?

By | February 7, 2024

Protocol-oriented programming (POP) is an approach to software development in Swift that emphasizes the use of protocols to define interfaces and behavior, promoting code reuse, flexibility, and composability. POP encourages structuring code around protocols rather than classes, focusing on what types can do rather than what they are. Key concepts of protocol-oriented programming in Swift… Read More »

What is XCTest framework in iOS?

By | February 5, 2024

The XCTest framework is the testing framework provided by Apple for writing and running unit tests in iOS and macOS applications. It is part of the broader XCTest framework available in the Apple ecosystem. XCTest is commonly used with Swift and Objective-C to test various aspects of your code, ensuring its correctness, reliability, and maintainability.… Read More »

What is a frame and bounds of a UIView in swift?

By | February 4, 2024

In iOS development using UIKit, a UIView is a fundamental building block for constructing the user interface. Two important properties of a UIView are its frame and bounds. These properties define the size and location of the view within its superview. frame: In this example, myView is positioned at (50, 50) within its superview, and… Read More »

Handling exception in Ruby

By | January 30, 2024

In Ruby, exception handling is done using the begin, rescue, else, and ensure blocks. Here’s a basic structure of a begin-rescue block: Let’s break down the components: Example with a specific exception: In this example: As with any language, it’s good practice to catch only the exceptions you expect and handle them appropriately. Avoid catching… Read More »

How to do exception handling in python?

By | January 29, 2024

Exception handling in Python is done using the try, except, else, and finally blocks. Here’s a basic structure of a try-except block: Let’s break down the components: Example with a specific exception: In this example: You can customize exception handling based on the specific requirements of your code. It’s generally a good practice to catch… Read More »

What are python name spaces?

By | January 27, 2024

In Python, a namespace is a container that holds a set of names (identifiers) and their corresponding objects. It serves as a mapping between names and objects, allowing you to organize and manage the scope of variables, functions, classes, and other identifiers in your code. Namespaces help avoid naming conflicts and provide a way to… Read More »

What is inout parameter in swift?

By | January 24, 2024

In Swift, inout is a keyword used to indicate that a parameter is passed by reference and can be modified inside a function, affecting the original value outside the function. This allows a function to modify the value of the parameter and have those changes reflected in the calling scope. Here’s an example to illustrate… Read More »

Common SQL commands with example

By | January 20, 2024

Certainly! SQL (Structured Query Language) is used to interact with relational databases. Here are some common SQL commands with examples: Example: Example: Example: Example: Example: Example: Example: Example: These are just a few examples of common SQL commands. SQL is a powerful language with many features, and its usage can vary depending on the specific… Read More »

Concurrency in Python

By | January 18, 2024

In Python, there are several ways to implement concurrency, allowing you to execute multiple tasks concurrently to improve the performance of your code. Here are some commonly used methods: Threading: Multiprocessing: Asyncio (asynchronous I/O): ThreadPoolExecutor and ProcessPoolExecutor: Choose the concurrency approach that best fits your specific use case, considering factors such as the nature of… Read More »

How to use BlockOperation in swift?

By | January 17, 2024

In Swift, BlockOperation is a subclass of Operation that allows you to encapsulate the code you want to execute concurrently. You can use it to create operations that consist of one or more blocks of code. Here’s an example of how to use BlockOperation: In this example: The OperationQueue takes care of managing the concurrent… Read More »

How to do navigation and data pass in swiftUI?

By | January 14, 2024

In SwiftUI, navigation is typically handled using the NavigationView and related components. Here’s a basic guide on how to perform navigation in SwiftUI: Basic Navigation with NavigationLink: 2. Creating NavigationLinks: 3. Creating the Destination View: 4. Putting it All Together: Passing Data with NavigationLink: 2. Receiving Data in Destination View:In the destination view, define a… Read More »

What are the difference between UIKit and SwiftUI in iOS?

By | January 14, 2024

UIKit and SwiftUI are both UI frameworks used in iOS development, but they differ significantly in terms of design, architecture, and development approach. Here are some key differences between UIKit and SwiftUI: 1. Declarative vs Imperative 2. UI Layout 3. Code re-usability 4. Live preview 5. UI Representation 6. State management 7. Adoption and Legacy… Read More »

How data is passed from one view to another in SwiftUI?

By | January 13, 2024

In SwiftUI, you can pass data from one view to another using the @State, @Binding, @ObservedObject, or @EnvironmentObject property wrappers. The appropriate choice depends on the nature of the data and the relationship between the views. Below are brief explanations and examples for each approach: 1. @State : Use @State to store simple values within… Read More »

Setting button actions programatically in Java, Python, JavaScript, SWIFT and Kotlin

By | January 9, 2024

Button action calls for an action when user tap on a button. This may be for making a service call, for doing some calculation or simply just to dismiss a view. Here are the different ways of setting button action in different languages. Java Python (TKinter) JavaScript: Swift Kotlin These examples demonstrate how to set… Read More »

Three common errors in Python programming along with examples

By | January 8, 2024

1. Syntax ErrorExample: 2. IndentationErrorExample: Explanation: Python relies on indentation to define block structures. The print statement is not properly indented under the if statement, leading to an indentation error. 3.NameErrorExample: Explanation: The variable y is not defined before trying to print it, resulting in a NameError. It’s worth noting that the examples provided are… Read More »

Convert a date from Central Standard Time (CST) to Indian Standard Time (IST)

By | January 2, 2024

To convert a date from Central Standard Time (CST) to Indian Standard Time (IST), you need to consider the time zone difference between these two zones. Below are examples in Swift : Swift: Java: Python: JavaScript: These examples assume a specific date and time format. You should adjust the date format and time zone identifiers… Read More »

Converting date into string format in Python, Javascript, Java and Ruby

By | December 30, 2023

Pythonfrom datetime import datetimedate_object = datetime.now()date_string = date_object.strftime(“%Y-%m-%d %H:%M:%S”)print(date_string) JavaScriptconst currentDate = new Date();const dateString = currentDate.toISOString(); // Adjust the format as neededconsole.log(dateString); Javaimport java.text.SimpleDateFormat;import java.util.Date; public class DateToString {public static void main(String[] args) {Date currentDate = new Date();SimpleDateFormat dateFormat = new SimpleDateFormat(“yyyy-MM-dd HH:mm:ss”);String dateString = dateFormat.format(currentDate);System.out.println(dateString);}} Rubyrequire ‘date’current_date = DateTime.nowdate_string = current_date.strftime(‘%Y-%m-%d %H:%M:%S’)puts date_string… Read More »