這是Enumerable.Zip擴展確實在.NET 4你會寫像這樣(假設這是整個XDocument
):
var set1Elements = document.Element("set1").Elements();
var set2Elements = document.Element("set2").Elements();
var results = set1Elements.Zip(set2Elements,
(s1, s2) => new { Value1 = s1.Value, Value2 = s2.Value });
如果您使用.NET 3.5或更早版本,這不是太難寫Zip
擴展:
public static IEnumerable<TResult> Zip<TFirst, TSecond, TResult>(
this IEnumerable<TFirst> first,
IEnumerable<TSecond> second,
Func<TFirst, TSecond, TResult> resultSelector)
{
using (var firstEnumerator = first.GetEnumerator())
using (var secondEnumerator = second.GetEnumerator())
{
while ((firstEnumerator.MoveNext() && secondEnumerator.MoveNext()))
{
yield return resultSelector(firstEnumerator.Current,
secondEnumerator.Current);
}
}
}