public static bool Any <TSource>(IEnumerable <TSource> source, ReadCallback_t <TSource, bool> predicate)
{
Check.SourceAndPredicate(source, predicate);
foreach (TSource element in source)
{
if (predicate(element))
{
return(true);
}
}
return(false);
}
static TSource First <TSource>(IEnumerable <TSource> source, ReadCallback_t <TSource, bool> predicate, Fallback fallback)
{
foreach (TSource element in source)
{
if (predicate(element))
{
return(element);
}
}
if (fallback == Fallback.Throw)
{
throw NoMatchingElement();
}
return(default(TSource));
}
public static TSource FirstOrDefault <TSource>(IEnumerable <TSource> source, ReadCallback_t <TSource, bool> predicate)
{
Check.SourceAndPredicate(source, predicate);
return(First(source, predicate, Fallback.Default));
}
