✨ Add Char[].Random and String.Random

X10D/src/CharExtensions.cs

@@ -3,6 +3,10 @@
     #region Using Directives
 
     using System;
+    using System.Collections;
+    using System.Collections.Generic;
+    using System.Linq;
+    using System.Text;
 
     #endregion
 
@@ -11,6 +15,58 @@
     /// </summary>
     public static class CharExtensions
     {
+        /// <summary>
+        /// Generates a new random string by filling it with characters found in <see cref="chars"/>.
+        /// </summary>
+        /// <param name="chars">The character set.</param>
+        /// <param name="length">The length of the string to generate.</param>
+        /// <returns>Returns a <see cref="String"/> containing <paramref name="length"/> characters.</returns>
+        public static string Random(this char[] chars, int length)
+        {
+            return chars.Random(length, new Random());
+        }
+
+        /// <summary>
+        /// Generates a new random string by filling it with characters found in <see cref="chars"/>.
+        /// </summary>
+        /// <param name="chars">The character set.</param>
+        /// <param name="length">The length of the string to generate.</param>
+        /// <param name="random">The <see cref="System.Random"/> instance.</param>
+        /// <returns>Returns a <see cref="String"/> containing <paramref name="length"/> characters.</returns>
+        public static string Random(this char[] chars, int length, Random random)
+        {
+            StringBuilder builder = new StringBuilder(length);
+            for (int i = 0; i < length; i++)
+            {
+                builder.Append(chars.ElementAt(random.Next(0, chars.Length)));
+            }
+
+            return builder.ToString();
+        }
+
+        /// <summary>
+        /// Generates a new random string by filling it with characters found in <see cref="chars"/>.
+        /// </summary>
+        /// <param name="chars">The character set.</param>
+        /// <param name="length">The length of the string to generate.</param>
+        /// <returns>Returns a <see cref="String"/> containing <paramref name="length"/> characters.</returns>
+        public static string Random(this IEnumerable<char> chars, int length)
+        {
+            return chars.Random(length, new Random());
+        }
+
+        /// <summary>
+        /// Generates a new random string by filling it with characters found in <see cref="chars"/>.
+        /// </summary>
+        /// <param name="chars">The character set.</param>
+        /// <param name="length">The length of the string to generate.</param>
+        /// <param name="random">The <see cref="System.Random"/> instance.</param>
+        /// <returns>Returns a <see cref="String"/> containing <paramref name="length"/> characters.</returns>
+        public static string Random(this IEnumerable<char> chars, int length, Random random)
+        {
+            return chars.ToArray().Random(length, random);
+        }
+
         /// <summary>
         /// Repeats a character a specified number of times.
         /// </summary>

X10D/src/StringExtensions.cs

@@ -108,6 +108,29 @@
             return encoding.GetBytes(str);
         }
 
+        /// <summary>
+        /// Generates a new random string by filling it with characters found in <see cref="str"/>.
+        /// </summary>
+        /// <param name="str">The character set.</param>
+        /// <param name="length">The length of the string to generate.</param>
+        /// <returns>Returns a <see cref="String"/> containing <paramref name="length"/> characters.</returns>
+        public static string Random(this string str, int length)
+        {
+            return str.Random(length, new Random());
+        }
+
+        /// <summary>
+        /// Generates a new random string by filling it with characters found in <see cref="str"/>.
+        /// </summary>
+        /// <param name="str">The character set.</param>
+        /// <param name="length">The length of the string to generate.</param>
+        /// <param name="random">The <see cref="System.Random"/> instance.</param>
+        /// <returns>Returns a <see cref="String"/> containing <paramref name="length"/> characters.</returns>
+        public static string Random(this string str, int length, Random random)
+        {
+            return str.ToCharArray().Random(length, random);
+        }
+
         /// <summary>
         /// Repeats a string a specified number of times.
         /// </summary>