https://github.com/kolosovpetro/delegatesinlinq

Simple snippet of use of Func, Predicate delegates in LINQ
https://github.com/kolosovpetro/delegatesinlinq

Last synced: about 1 month ago
JSON representation

Simple snippet of use of Func, Predicate delegates in LINQ

• Host: GitHub
• URL: https://github.com/kolosovpetro/delegatesinlinq
• Owner: kolosovpetro
• Created: 2020-12-25T15:22:51.000Z (almost 5 years ago)
• Default Branch: master
• Last Pushed: 2020-12-29T18:34:58.000Z (almost 5 years ago)
• Last Synced: 2025-03-05T18:35:35.394Z (7 months ago)
• Language: C#
• Homepage:
• Size: 6.84 KB
• Stars: 2
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

Awesome Lists containing this project

README

          
# Delegates in LINQ

Simple snippet of use of Func, Predicate delegates in LINQ

## Code Snippet

```cs

private static readonly Func Func1 = (employee, i)

    => employee.Age > i;

private static readonly Func Func2 = (employee, i)

    => employee.Salary > i;

private static readonly Predicate P1 = employee => employee.Age > 22;

private static readonly Predicate P2 = employee => employee.Salary > 120;

private static readonly Predicate P3 = employee => employee.Firstname.Contains("Name");

private static void Main()

{

    var employees = new[]

    {

        new Employee("Name 0", "Surname 0", 20, 100),

        new Employee("Name 1", "Surname 1", 21, 110),

        new Employee("Name 2", "Surname 2", 22, 120),

        new Employee("Name 3", "Surname 3", 23, 130),

        new Employee("Name 4", "Surname 4", 24, 140),

        new Employee("Name 5", "Surname 5", 25, 150),

        new Employee("Name 6", "Surname 6", 26, 160),

    };

	Console.WriteLine("Age greater than 30: ");

	var selectAgeFunc = employees.Where(e => Func1(e, 20)).ToList();

	selectAgeFunc.ForEach(Console.WriteLine);

	Console.WriteLine("\nSalary greater than 200: ");

	var selectSalaryFunc = employees.Where(e => Func2(e, 200)).ToList();

	selectSalaryFunc.ForEach(Console.WriteLine);

	Console.WriteLine("\nAge grater than 20 predicate: ");

	var selectAgePredicate = employees.Where(e => P1(e)).ToList();

	selectAgePredicate.ForEach(Console.WriteLine);

	Console.WriteLine("\nEnumerable AND: ");

	var enumerableAnd = employees.PredicatesAnd(P1, P2, P3).ToList();

	enumerableAnd.ForEach(Console.WriteLine);

            

    Console.WriteLine("\nEnumerable OR: ");

    var enumerableOr = employees.PredicatesOr(P1, P2, P3).ToList();

    enumerableOr.ForEach(Console.WriteLine);

}

```