public void TestEqualsEachInRandomOrder()
{
var enum1 = new[] { 1, 2, 3, 4, };
Assert.AreEqual(true, IEnumerableUtil.EqualsEachInRandomOrder(enum1, new[] { 1, 2, 3, 4, }));
Assert.AreEqual(true, IEnumerableUtil.EqualsEachInRandomOrder(enum1, new[] { 1, 3, 2, 4 }));
Assert.AreEqual(false, IEnumerableUtil.EqualsEachInRandomOrder(enum1, new[] { 1, 2, 3 }));
Assert.AreEqual(false, IEnumerableUtil.EqualsEachInRandomOrder(enum1, new[] { 1, 2, 3, 4, 5, }));
Assert.AreEqual(false, IEnumerableUtil.EqualsEachInRandomOrder(enum1, new[] { 1, 3, 2 }));
Assert.AreEqual(false, IEnumerableUtil.EqualsEachInRandomOrder(enum1, new[] { 1, 3, 2, 4, 5, }));
}
/// <summary>
/// enumerableからfuncでIComparableを取得し，それが最小の要素を返す．
/// </summary>
public static T FindMin <T, S>(this IEnumerable <T> enumerable, Func <T, S> func) where S : IComparable
{
Contract.Requires(!IEnumerableUtil.IsNullOrEmpty(enumerable));
var ret = enumerable.First();
var value = func(ret);
foreach (var elem in enumerable)
{
S v = func(elem);
if (v.CompareTo(value) < 0)
{
value = v;
ret = elem;
}
}
return(ret);
}
