public void readonly_span_odd()
{
ReadOnlySpan <int> values = stackalloc int[] {
1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
11, 12, 13, 14, 15, 16, 17, 18, 19, 20,
21, 22, 23, 24, 25, 26, 27, 28, 29,
};
Assert.False(values.All(v => v % 2 != 0));
}
/// <summary>
/// Determines whether all elements in this collection are equal to each other. Compares using the <see cref="object.Equals(object)"/> method.
/// <para>This method returns true if the collection is empty or it contains only one element.</para>
/// </summary>
/// <typeparam name="T">The type of the elements.</typeparam>
/// <param name="source">The collection.</param>
/// <param name="comparer">The comparer</param>
public static Boolean AllSame <T>(this ReadOnlySpan <T> source, IEqualityComparer <T> comparer)
{
if (comparer is null)
{
throw new ArgumentNullException(nameof(comparer));
}
if (source.Length <= 0)
{
return(true);
}
T first = source[0];
return(source.All(e => comparer.Equals(first, e)));
}
static bool All <TSource>(this ReadOnlySpan <TSource> source, Func <TSource, bool> predicate) => source.All(new FunctionWrapper <TSource, bool>(predicate));