Programming Articles - Page 358 of 3363

In many software development projects, there comes a point where it becomes necessary to sort a list of objects based on one or more properties of the objects. In C#, the LINQ (Language Integrated Query) library provides a powerful and easy-to-use way to sort lists of objects based on one or more criteria. In this tutorial, we will demonstrate how to sort a list of Employee objects based on their salary using LINQ. Steps Create an Employee class with properties for Name, Salary, and Department. Create a List of Employee objects and populate it with some data. Use LINQ ... Read More

In C#, LINQ (Language Integrated Query) is a powerful tool that enables you to easily sort, filter, and manipulate data. In this article, we'll demonstrate how to use LINQ to sort a list of employees based on their salary in descending order and department in which they work. Sorting a List of Employees Based on Salary in Descending Order and Whose Department is XYZ using LINQ − To sort a list of employees based on their salary in descending order and department using LINQ, you can follow the steps below − Create a class to represent an Employee − ... Read More

In Swift, underscores have many different uses for a different purposes. Here are some examples. Ignore unnecessary loop variables or return values. Absence of identifiers for external parameters in function calls. Even if they were initially specified as constants, making variables changeable. Ignoring tuple components or using discard values when managing errors. To Ignore a Value To ignore a value that a function or method returns in Swift, use an underscore. You could compose something like this, for instance, if you only worry about an operation's success or failure. This is the most common case you use in ... Read More

In Swift, we can use the map() method to the dictionary to apply a transformation to the values of the dictionary. This method returns a newly created object with the same keys as the original dictionary but with the values transformed by the mapping function. Example 1: Transforming Values with a Closure In the following example, we are performing the multiplication on each value in the dictionary using the mapValues() function. We pass a closure that takes an argument. In the resulting dictionary, you can see that each value has been doubled. import Foundation let inputDictionary = [1: 2, 3: ... Read More

In C#, LINQ (Language Integrated Query) is a powerful tool that enables you to easily sort, filter, and manipulate data. In this article, we'll demonstrate how to use LINQ to sort a list of employees based on their salary and department. Sorting a List of Employees Based on Salary and Department using LINQ To sort a list of employees based on their salary and department using LINQ, you can follow the steps below − 1. Create a Class to Represent an Employee public class Employee { public string Name { get; set; } public int ... Read More

There is no single "best" practice for naming Swift files that add extensions to existing objects, but here are some commonly used conventions − Object Prefix Followed by Functionality String+Utilities.swift − adds utility functions to the String class Array+Sorting.swift − adds sorting functions to the Array class UIColor+Extensions.swift − adds color-related functions to the UIColor class Functionality Prefix Followed by Object CustomView+Animation.swift − adds animation functionality to a custom view class called CustomView JSONEncoder+CustomEncoding.swift − adds custom encoding and decoding functionality to the JSONEncoder class UICollectionViewLayout+Extensions.swift − adds layout-related functions to the UICollectionViewLayout class Descriptive Naming ... Read More

In Swift, there are some different syntaxes to declare an empty dictionary. It is important to remember that all syntaxes produce the same result. In this article, you will see examples of how to declare an empty dictionary and define a dictionary in Swift. What is a Swift Dictionary? A dictionary is a collection in Swift that lets you keep key-value pairs. Each key in the dictionary has a corresponding value, and each word in the dictionary needs to be distinct. Because dictionaries are unordered, the sequence in which key-value pairs are introduced does not matter. Example In this example, ... Read More

The GetEnvironmentVariable() method of the Environment class in C# is used to get the value of an environment variable. It is a useful method for retrieving system-wide and user-specific environment variables. In this article, we will discuss the usage of the GetEnvironmentVariable() method and see how to use it in a C# program. What is the GetEnvironmentVariable() Method? The GetEnvironmentVariable() method is a static method of the Environment class in C#. It takes the name of an environment variable as a string and returns the value of the variable as a string. If the environment variable does not exist, it ... Read More

In Swift, you can convert an enum value to a String through the rawValue property. This is if the enum has a raw value of type String. If the enum doesn't have a raw value, you can use the String(describing:) initializer to get a string representation of the enum value. Also, you can use the CustomStringConvertible protocol. Example 1 Convert an enum value to a string using the rawValue property.In this example, Fruit is an enum with a raw value of type String. The rawValue property is used to get a string representation of the myFruit enum value, which is ... Read More

The Exists property in C# is a very useful property that checks whether any element in a collection matches a given condition. This property is a part of the List class in C# and returns a Boolean value indicating whether any element exists in the list that satisfies the specified condition. In this article, we will explore the usage of the Exists property in a C# program. What is the Exists Property? The Exists property is a Boolean property that is defined in the List class in C#. It takes a delegate as an argument and returns a Boolean value ... Read More