Question

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C# foreach with index

I enjoy working the simplicity of foreach in C#, but I often need an index. Is there any way to combine these elegantly into one simple structure without doing the following:

for(var i = 0; i<items.Count; i++) {
    var item = items[i];

Or

int i = 0;
foreach(var item in items) {
    i++;

I’d imagine something neat like:

foreach(var item in items;int index) {

Answer 1

yes,

there’s a neat extension method that i found here on SO:

foreach with index

works a bit like this (verbatim from previous answer):

public static void Each<T>( this IEnumerable<T> ie, Action<T, int> action )
{
    var i = 0;
    foreach ( var e in ie ) action( e, i++ );
}

and is used like:

var strings = new List<string>();
strings.Each(( str, n ) =>
{
    // hooray can capture 'n' as well as 'str'
});

or:

strings.Each((str, n) => Console.WriteLine(str));