/// <summary>
/// Interact throught an instance of <see cref="IEnumerable{T}"/>.
/// And pass an index value to the interator action.
/// </summary>
/// <typeparam name="T">The enumerable argument type.</typeparam>
/// <param name="source">An instance of <see cref="IEnumerable{T}"/>.</param>
/// <param name="action">The interator action.</param>
/// <exception cref="ArgumentNullException">
/// if <paramref name="source"/> or <paramref name="action"/> were <c>null</c>.
/// </exception>
public static void Each <T>(this IEnumerable <T> source, Action <T, int> action)
{
Prevent.ParameterNull(action, nameof(action));
if (source == null)
{
return;
}
var counter = 0;
using (var enumerator = source.GetEnumerator()) {
while (enumerator.MoveNext())
{
action(enumerator.Current, counter++);
}
}
}
/// <summary>
/// Interact throught an instance of <see cref="IEnumerable"/>.
/// And pass an index value to the interator action.
/// </summary>
/// <param name="source">An instance of <see cref="IEnumerable"/>.</param>
/// <param name="action">The interator action.</param>
/// <exception cref="ArgumentNullException">
/// if <paramref name="source"/> or <paramref name="action"/> were <c>null</c>.
/// </exception>
public static void Each(this IEnumerable source, Action <object, int> action)
{
Prevent.ParameterNull(action, nameof(action));
if (source == null)
{
return;
}
var counter = 0;
var enumerator = source.GetEnumerator();
while (enumerator.MoveNext())
{
action(enumerator.Current, counter++);
}
var disposable = enumerator as IDisposable;
if (disposable != null)
{
disposable.Dispose();
}
}
/// <summary>
/// Interact throught an instance of <see cref="IEnumerable"/>.
/// </summary>
/// <param name="source">An instance of <see cref="IEnumerable"/>.</param>
/// <param name="action">The interator action.</param>
/// <exception cref="ArgumentNullException">
/// if <paramref name="source"/> or <paramref name="action"/> were <c>null</c>.
/// </exception>
public static void Each(this IEnumerable source, Action <object> action)
{
Prevent.ParameterNull(action, nameof(action));
Each(source, (current, _) => action(current));
}