{
var items = new HashSet<TSource> (second, comparer);
foreach (TSource element in first) {
- if (items.Contains (element))
+ if (items.Remove (element))
yield return element;
}
}
{
Check.Source (source);
- return IterateNullable (source, int.MinValue, (a, b) => a > b);
+ return IterateNullable (source, (a, b) => Math.Max (a, b));
}
public static long? Max (this IEnumerable<long?> source)
{
Check.Source (source);
- return IterateNullable (source, long.MinValue, (a, b) => a > b);
+ return IterateNullable (source, (a, b) => Math.Max (a, b));
}
public static double? Max (this IEnumerable<double?> source)
{
Check.Source (source);
- return IterateNullable (source, double.MinValue, (a, b) => a > b);
+ return IterateNullable (source, (a, b) => Math.Max (a, b));
}
public static float? Max (this IEnumerable<float?> source)
{
Check.Source (source);
- return IterateNullable (source, float.MinValue, (a, b) => a > b);
+ return IterateNullable (source, (a, b) => Math.Max (a, b));
}
public static decimal? Max (this IEnumerable<decimal?> source)
{
Check.Source (source);
- return IterateNullable (source, decimal.MinValue, (a, b) => a > b);
+ return IterateNullable (source, (a, b) => Math.Max (a, b));
}
- static T? IterateNullable<T> (IEnumerable<T?> source, T initValue, Func<T?, T?, bool> selector) where T : struct
+ static T? IterateNullable<T> (IEnumerable<T?> source, Func<T, T, T> selector) where T : struct
{
bool empty = true;
- T? value = initValue;
+ T? value = null;
foreach (var element in source) {
if (!element.HasValue)
continue;
- if (selector (element.Value, value))
- value = element;
+ if (!value.HasValue)
+ value = element.Value;
+ else
+ value = selector (element.Value, value.Value);
+
+ empty = false;
+ }
+
+ if (empty)
+ return null;
+
+ return value;
+ }
+
+ static TRet? IterateNullable<TSource, TRet> (
+ IEnumerable<TSource> source,
+ Func<TSource, TRet?> source_selector,
+ Func<TRet?, TRet?, bool> selector) where TRet : struct
+ {
+ bool empty = true;
+ TRet? value = null;
+ foreach (var element in source) {
+ TRet? item = source_selector (element);
+
+ if (!value.HasValue)
+ value = item;
+ else if (selector (item, value))
+ value = item;
empty = false;
}
return initValue;
}
- static U? IterateNullable<T, U> (IEnumerable<T> source, U initialValue, Func<T, U?, U?> selector) where U : struct
- {
- bool empty = true;
- U? value = initialValue;
- foreach (var element in source) {
- value = selector (element, value);
- if (!value.HasValue)
- continue;
-
- empty = false;
- }
-
- if (empty)
- return null;
-
- return value;
- }
-
public static int? Max<TSource> (this IEnumerable<TSource> source, Func<TSource, int?> selector)
{
Check.SourceAndSelector (source, selector);
- return IterateNullable (source, int.MinValue, (a, b) => {
- var v = selector (a); return v > b ? v : b;
- });
+ return IterateNullable (source, selector, (a, b) => a > b);
}
public static long? Max<TSource> (this IEnumerable<TSource> source, Func<TSource, long?> selector)
{
Check.SourceAndSelector (source, selector);
- return IterateNullable (source, long.MinValue, (a, b) => {
- var v = selector (a); return v > b ? v : b;
- });
+ return IterateNullable (source, selector, (a, b) => a > b);
}
public static double? Max<TSource> (this IEnumerable<TSource> source, Func<TSource, double?> selector)
{
Check.SourceAndSelector (source, selector);
- return IterateNullable (source, double.MinValue, (a, b) => {
- var v = selector (a); return v > b ? v : b;
- });
+ return IterateNullable (source, selector, (a, b) => a > b);
}
public static float? Max<TSource> (this IEnumerable<TSource> source, Func<TSource, float?> selector)
{
Check.SourceAndSelector (source, selector);
- return IterateNullable (source, float.MinValue, (a, b) => {
- var v = selector (a); return v > b ? v : b;
- });
+ return IterateNullable (source, selector, (a, b) => a > b);
}
public static decimal? Max<TSource> (this IEnumerable<TSource> source, Func<TSource, decimal?> selector)
{
Check.SourceAndSelector (source, selector);
- return IterateNullable (source, decimal.MinValue, (a, b) => {
- var v = selector (a); return v > b ? v : b;
- });
+ return IterateNullable (source, selector, (a, b) => a > b);
}
public static TResult Max<TSource, TResult> (this IEnumerable<TSource> source, Func<TSource, TResult> selector)
{
Check.Source (source);
- return IterateNullable (source, int.MaxValue, (a, b) => a < b);
+ return IterateNullable (source, (a, b) => Math.Min (a, b));
}
public static long? Min (this IEnumerable<long?> source)
{
Check.Source (source);
- return IterateNullable (source, long.MaxValue, (a, b) => a < b);
+ return IterateNullable (source, (a, b) => Math.Min (a, b));
}
public static double? Min (this IEnumerable<double?> source)
{
Check.Source (source);
- return IterateNullable (source, double.MaxValue, (a, b) => a < b);
+ return IterateNullable (source, (a, b) => Math.Min (a, b));
}
public static float? Min (this IEnumerable<float?> source)
{
Check.Source (source);
- return IterateNullable (source, float.MaxValue, (a, b) => a < b);
+ return IterateNullable (source, (a, b) => Math.Min (a, b));
}
public static decimal? Min (this IEnumerable<decimal?> source)
{
Check.Source (source);
- return IterateNullable (source, decimal.MaxValue, (a, b) => a < b);
+ return IterateNullable (source, (a, b) => Math.Min (a, b));
}
public static TSource Min<TSource> (this IEnumerable<TSource> source)
{
Check.SourceAndSelector (source, selector);
- return IterateNullable (source, int.MaxValue, (a, b) => {
- var v = selector (a); return v < b ? v : b;
- });
+ return IterateNullable (source, selector, (a, b) => a < b);
}
public static long? Min<TSource> (this IEnumerable<TSource> source, Func<TSource, long?> selector)
{
Check.SourceAndSelector (source, selector);
- return IterateNullable (source, long.MaxValue, (a, b) => {
- var v = selector (a); return v < b ? v : b;
- });
+ return IterateNullable (source, selector, (a, b) => a < b);
}
public static float? Min<TSource> (this IEnumerable<TSource> source, Func<TSource, float?> selector)
{
Check.SourceAndSelector (source, selector);
- return IterateNullable (source, float.MaxValue, (a, b) => {
- var v = selector (a); return v < b ? v : b;
- });
+ return IterateNullable (source, selector, (a, b) => a < b);
}
public static double? Min<TSource> (this IEnumerable<TSource> source, Func<TSource, double?> selector)
{
Check.SourceAndSelector (source, selector);
- return IterateNullable (source, double.MaxValue, (a, b) => {
- var v = selector (a); return v < b ? v : b;
- });
+ return IterateNullable (source, selector, (a, b) => a < b);
}
public static decimal? Min<TSource> (this IEnumerable<TSource> source, Func<TSource, decimal?> selector)
{
Check.SourceAndSelector (source, selector);
- return IterateNullable (source, decimal.MaxValue, (a, b) => {
- var v = selector (a); return v < b ? v : b;
- });
+ return IterateNullable (source, selector, (a, b) => a < b);
}
public static TResult Min<TSource, TResult> (this IEnumerable<TSource> source, Func<TSource, TResult> selector)
projects / mono.git / blobdiff