Is there any Linq style syntax for "For each" operations?
For instance, add values based on one collection to another, already existing one:
IEnumerable<int> someValues = new List<int>() { 1, 2, 3 };
IList<int> list = new List<int>();
someValues.ForEach(x => list.Add(x + 1));
Instead of
foreach(int value in someValues)
{
list.Add(value + 1);
}
There isn't anything built-in, but you can easily create your own extension method to do it:
public static void ForEach<T>(this IEnumerable<T> source, Action<T> action)
{
if (source == null) throw new ArgumentNullException("source");
if (action == null) throw new ArgumentNullException("action");
foreach (T item in source)
{
action(item);
}
}
There is no Linq ForEach extension. However, the List class has a ForEach method on it, if you're willing to use the List directly.
For what it's worth, the standard foreach syntax will give you the results you want and it's probably easier to read:
foreach (var x in someValues)
{
list.Add(x + 1);
}
If you're adamant you want an Linq style extension. it's trivial to implement this yourself.
public static void ForEach<T>(this IEnumerable<T> @this, Action<T> action)
{
foreach (var x in @this)
action(x);
}