public static bool Find <T>(this SCG.IEnumerable <T> enumerable, Func <T, bool> predicate, out T item)
{
#region Code Contracts
// Argument must be non-null
Requires(enumerable != null, ArgumentMustBeNonNull);
// Argument must be non-null
Requires(predicate != null, ArgumentMustBeNonNull);
// Returns true if p(x) returned true for some item x; otherwise false
Ensures(Result <bool>() == enumerable.Any(predicate));
// Result item equals the first (or default) item satisfying the predicate
Ensures(ValueAtReturn(out item).IsSameAs(enumerable.FirstOrDefault(predicate)));
#endregion
bool result;
// Use Enumerable.Where() to be able to retrieve value for result
using (var enumerator = enumerable.Where(predicate).GetEnumerator()) {
item = (result = enumerator.MoveNext()) ? enumerator.Current : default(T);
}
return(result);
}