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expression function c#

By Mushy MockingbirdMushy Mockingbird on Jan 19, 2021
public class Student 
{
    public int StudentID { get; set; }
    public string StudentName { get; set; }
    public int Age { get; set; }
}

Func<Student, bool> isTeenAger = s => s.Age > 12 && s.Age < 20;

Source: www.tutorialsteacher.com

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c# lambdas

By TheCodeTrooperTheCodeTrooper on Oct 03, 2020
//Lambdas are just short handed anonymous method or functions usally 
//for use in passing to other methods or functions to call such as a sort.
//Example:
//The Lambda used here after the =s
Action ExampleContainerForDelagate = ()=>
	{/*Do something such as this example*/
    	Console.WriteLine("Hello world");
	};
//has been shorted from this anonymous delegate or method.
Action ExampleContainerForDelagate = delegate () { Console.WriteLine("Hello world"); };
//And this full (named) method signature method passing
Action ExampleContainerForDelagate = ExampleMethod;
void ExampleMethod()
{ Console.WriteLine("Hello world"); }
//usage example
List<int> ExampleList = new List(){1,3,0};
ExampleList.Sort((x,y)=>{return x - y; });
//The Sort will sort based on the return values from the Lambda passed.
//a negative will be seen as a smaller than the next number
//a 0 will be seen as equal
//and a positive will be seen as bigger than the next number
//by switching x and y postion in the 'return x - y;' you will effectively 
//change the sort to descending order. This is there for useful for sorting 
//based on needs or where it is not obvious how to sort.

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expression function c#

By Mushy MockingbirdMushy Mockingbird on Jan 19, 2021
Expression<Func<Student, bool>> isTeenAgerExpr = s => s.Age > 12 && s.Age < 20;

Source: www.tutorialsteacher.com

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