/// <summary>
/// <para>Generates specified number of random bytes.</para>
/// </summary>
/// <param name="self">Randomization object that is being extended.</param>
/// <param name="count">Number of bytes to generate.</param>
/// <returns>Array of randomly generated bytes. Length of array is equal to <paramref name="count"/>.</returns>
/// <exception cref="ArgumentNullException">If <paramref name="self"/> is a <c>null</c> reference.</exception>
/// <exception cref="ArgumentException"></exception>
/// <seealso cref="Random.NextBytes(byte[])"/>
public static byte[] Bytes(this Random self, int count)
{
Assertion.NotNull(self);
Assertion.True(count > 0);
var numbers = new byte[count];
self.NextBytes(numbers);
return(numbers);
}
/// <summary>
/// <para>Replaces all occurrences of different substrings with specified new values.</para>
/// </summary>
/// <param name="self">Source string where replacements are to be made.</param>
/// <param name="from">Collection of substrings that should be replaced in source string. It must have the same number of elements as in <paramref name="to"/> sequence.</param>
/// <param name="to">Collection of new replacement values. It must have the same number of elements as in <paramref name="from"/> sequence.</param>
/// <returns>New string with performed replacements.</returns>
/// <exception cref="ArgumentNullException">If either <paramref name="self"/>, <paramref name="from"/> or <paramref name="to"/> is a <c>null</c> reference.</exception>
/// <exception cref="ArgumentException"></exception>
/// <seealso cref="Replace(string, IDictionary{string, string})"/>
public static string Replace(this string self, IEnumerable <string> from, IEnumerable <string> to)
{
Assertion.NotNull(self);
Assertion.NotNull(from);
Assertion.NotNull(to);
Assertion.True(from.Count() == to.Count());
var sb = new StringBuilder(self);
for (var i = 0; i < from.Count(); i++)
{
sb.Replace(from.ElementAt(i), to.ElementAt(i));
}
return(sb.ToString());
}
/// <summary>
/// <para>Returns a collection of values of <see cref="DescriptionAttribute"/> for a given enumeraton type.</para>
/// </summary>
/// <typeparam name="T">Type of enumeration.</typeparam>
/// <returns>Collection of descriptions for a given enumeration of type <typeparamref name="T"/>.</returns>
/// <seealso cref="DescriptionAttribute"/>
/// <seealso cref="Description(Enum)"/>
public static IEnumerable <string> Descriptions <T>() where T : struct
{
Assertion.True(typeof(T).IsEnum);
var descriptions = new List <string>();
var type = typeof(T);
var names = Enum.GetNames(type);
names.Each(name =>
{
var enumeration = Enum.Parse(type, name, true);
var description = enumeration.To <Enum>().Description();
descriptions.Add(description.IsEmpty() ? name : description);
});
return(descriptions);
}
public void assert_true()
{
Assertion.True(true);
Assert.Throws <ArgumentException>(() => Assertion.True(false));
}
