What is the equivalent of C # map function in Haskell

Question

The display function in Haskell has two input parameters. The first parameter is a function, and the second parameter is a list. The map function applies the function passed as an input parameter to all elements in the list and returns a new list.

Is there a C # equivalent for this function?

Answer 1

Select

MSDN Link

See my question here (Only if you are interested, as this is not directly related).

Answer 2

Another alternative to Select and SelectMany is to write your own extension method.

 public static IEnumerable<U> Map<T, U>(this IEnumerable<T> s, Func<T, U> f) { foreach (var item in s) yield return f(item); } 

Thanks to Wes Dyer for this sweet extension method! :) See more.

Answer 3

Since Select and SelectMany have already been mentioned, I will answer an additional question that you did not ask: fold is like Aggregate .

Now everyone who reads this should be fully equipped to become the guy who writes X using the language idioms Y ... so for the sake of your fellow C # programmers, don't get carried away.

Answer 4

And to answer a question that you didn't ask, the Haskell equivalent of a monad "sequence" binding is called SelectMany in C #. See Wes Dyer's article about this article:

http://blogs.msdn.com/wesdyer/archive/2008/01/11/the-marvels-of-monads.aspx

Answer 5

What about ConvertAll ? It looks like the one closest to the map.