Inserts a string into another string before each occurrence of the specified Character Type. - CSharp System

CSharp examples for System:Char

  1. HOME
  2. CSharp
  3. System
  4. Char

Description

Inserts a string into another string before each occurrence of the specified Character Type.

Demo Code


using System.Text;
using System.Runtime.CompilerServices;
using System.Reflection;
using System.Linq;
using System.Globalization;
using System.Collections.Generic;
using System;/*w w  w.ja v  a  2  s  .  c  o m*/

public class Main{
        /// <summary>
        /// Inserts a <code>string</code> into another <code>string</code> before each occurrence of the specified <see cref="CharacterType"/>.
        /// </summary>
        /// <param name="source">The <code>string</code> to insert into.</param>
        /// <param name="type">The <see cref="CharacterType"/> to insert before.</param>
        /// <param name="insert">The <code>string</code> to insert.</param>
        /// <returns>The resultant <code>string</code>.</returns>
        /// <remarks>
        /// In the case of the first character of <code>source</code> matching the specified <see cref="CharacterType"/>, the <code>insert</code> will not be inserted.
        /// </remarks>
        public static string InsertOnCharacter(this string source, CharacterType type, string insert)
        {
            var esb = new ExtendedStringBuilder(source.Length);

            var firstRun = false;
            foreach (var c in source)
            {
                var cType = c.GetCharacterType();

                if (firstRun && cType == type)
                {
                    esb += insert;
                }

                esb += c;

                firstRun = true;
            }

            return esb;
        }
        public static CharacterType GetCharacterType(this char c)
        {
            if (c >= 'a' && c <= 'z')
            {
                return CharacterType.LowerLetter;
            }

            if (c >= 'A' && c <= 'Z')
            {
                return CharacterType.UpperLetter;
            }

            if (c >= '0' && c <= '9')
            {
                return CharacterType.Number;
            }

            return CharacterType.Symbol;
        }
}

Related Tutorials