Generic method to map objects of different types

Question

I would like to write Generic Method that would map List to new list, similar to JS\'s map method. I would then use this method like this:

var words= new Lis         


        

Answer 1

Linq's Select is the equivalent of the map() function in other functional languages. The mapping function would typically not be called Predicate, IMO - predicate would be a filter which could reduce the collection.

You can certainly wrap an extension method which would apply a projection to map input to output (either of which could be be anonymous types):

public static IEnumerable Map(this IEnumerable seznam, 
                                          Func mapper)
{
    foreach (var item in seznam)
        yield return mapper(item);
}

Which is equivalent to

public static IEnumerable Map(this IEnumerable seznam, 
                                          Func mapper)
{
    return seznam.Select(mapper);
}

And if you don't want a strong return type, you can leave the output type as object

public static IEnumerable