Executing a certain action for all elements in an Enumerable

Question

I have an Enumerable and am looking for a method that allows me to execute an action for each element, kind of like Select but then for si

Answer 1

You are looking for the ever-elusive ForEach that currently only exists on the List generic collection. There are many discussions online about whether Microsoft should or should not add this as a LINQ method. Currently, you have to roll your own:

public static void ForEach(this IEnumerable value, Action action)
{
  foreach (T item in value)
  {
    action(item);
  }
}

While the All() method provides similar abilities, it's use-case is for performing a predicate test on every item rather than an action. Of course, it can be persuaded to perform other tasks but this somewhat changes the semantics and would make it harder for others to interpret your code (i.e. is this use of All() for a predicate test or an action?).