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https://github.com/oliverbooth/X10D
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🔨 Add static Random instance to RandomExtensions
To prevent creating new instances on every method call, library now refers to a single static Random instance, when a random operation is needed.
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@ -18,7 +18,7 @@
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/// <returns>Returns a <see cref="string"/> containing <paramref name="length"/> characters.</returns>
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public static string Random(this char[] chars, int length)
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{
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return chars.Random(length, new Random());
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return chars.Random(length, RandomExtensions.Random);
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}
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/// <summary>
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@ -47,7 +47,7 @@
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/// <returns>Returns a <see cref="string"/> containing <paramref name="length"/> characters.</returns>
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public static string Random(this IEnumerable<char> chars, int length)
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{
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return chars.Random(length, new Random());
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return chars.Random(length, RandomExtensions.Random);
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}
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/// <summary>
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@ -9,22 +9,36 @@
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/// </summary>
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public static class RandomExtensions
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{
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/// <summary>
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/// Gets the <see cref="System.Random"/> instance to which other extension methods may refer, when one is
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/// needed but not provided.
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/// </summary>
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internal static Random Random { get; } = new Random();
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/// <summary>
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/// Returns either <see langword="true"/> or <see langword="false"/> based on <paramref name="random"/>'s next
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/// generation.
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/// </summary>
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/// <param name="random">The <see cref="Random"/> instance.</param>
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/// <param name="random">The <see cref="System.Random"/> instance.</param>
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/// <returns>Returns <see langword="true"/> or <see langword="false"/> depending on the return value
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/// from <see cref="System.Random.Next(int)"/>.</returns>
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/// <exception cref="ArgumentNullException"><paramref name="random"/> is <see langword="null"/>.</exception>
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public static bool CoinToss(this Random random)
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{
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if (random is null)
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{
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throw new ArgumentNullException(nameof(random));
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}
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return random.Next(2) == 0;
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}
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/// <summary>
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/// Returns a random element from <paramref name="source"/> using the <see cref="Random"/> instance.
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/// Returns a random element from <paramref name="source"/> using the <see cref="System.Random"/> instance.
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/// </summary>
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/// <typeparam name="T">The collection type.</typeparam>
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/// <param name="random">The <see cref="Random"/> instance.</param>
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/// <param name="source">The collection to draw from.</param>
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/// <param name="random">The <see cref="System.Random"/> instance.</param>
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/// <param name="source">The collection from which to draw.</param>
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/// <returns>Returns a random element of type <see cref="T"/> from <paramref name="source"/>.</returns>
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public static T OneOf<T>(this Random random, params T[] source)
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{
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@ -32,11 +46,11 @@
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}
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/// <summary>
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/// Returns a random element from <paramref name="source"/> using the <see cref="Random"/> instance.
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/// Returns a random element from <paramref name="source"/> using the <see cref="System.Random"/> instance.
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/// </summary>
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/// <typeparam name="T">The collection type.</typeparam>
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/// <param name="random">The <see cref="Random"/> instance.</param>
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/// <param name="source">The collection to draw from.</param>
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/// <param name="random">The <see cref="System.Random"/> instance.</param>
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/// <param name="source">The collection from which to draw.</param>
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/// <returns>Returns a random element of type <see cref="T"/> from <paramref name="source"/>.</returns>
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public static T OneOf<T>(this Random random, IList<T> source)
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{
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@ -105,7 +105,7 @@
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/// <returns>Returns a <see cref="string"/> containing <paramref name="length"/> characters.</returns>
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public static string Random(this string str, int length)
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{
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return str.Random(length, new Random());
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return str.Random(length, RandomExtensions.Random);
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}
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/// <summary>
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@ -146,7 +146,7 @@
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/// <returns>Returns a <see cref="string"/> containing the characters in <paramref name="str"/>, rearranged.</returns>
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public static string Shuffle(this string str)
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{
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return str.Shuffle(new Random());
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return str.Shuffle(RandomExtensions.Random);
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}
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/// <summary>
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