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C# Syntax - Example of a Lambda Expression - ForEach() over Generic List

First, I know there are methods off of the generic List<> class already in the framework do iterate over the List<>.

But as an example, what is the correct syntax to write a ForEach method to iterate over each object of a List<>, and do a Console.WriteLine(object.ToString()) on each object. Something that takes the List<> as the first argument and the lambda expression as the second argument.

Most of the examples I have seen are done as extension methods or involve LINQ. I'm looking for a plain-old method example.

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BuddyJoe Avatar asked Dec 04 '08 00:12

BuddyJoe


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2 Answers

public void Each<T>(IEnumerable<T> items, Action<T> action) {     foreach (var item in items)         action(item); } 

... and call it thusly:

Each(myList, i => Console.WriteLine(i)); 
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Matt Hamilton Avatar answered Sep 19 '22 09:09

Matt Hamilton


Is this what you're asking for?

int[] numbers = { 1, 2, 3 }; numbers.ToList().ForEach(n => Console.WriteLine(n)); 
like image 35
Mauro Torres Avatar answered Sep 20 '22 09:09

Mauro Torres