Splite 函数

Splite 是用得很多的字符串方法。
自己来实现一下。

   public static List<string> Splite(string src,char patChar)
        {
            List<string> result = new List<string>();
            if (string.IsNullOrEmpty(src))
            {
                return null;
            }
            else
            {
                int endIndex = 0;
                int frontIndex = -1;
                while (endIndex<src.Length)
                {
                    if (src[endIndex] != patChar)
                    {
                       
                    }
                    else 
                    {
                        string temp = string.Empty;
                        if (endIndex - frontIndex - 1 > 0)
                        {
                            temp = src.Substring(frontIndex + 1, endIndex - frontIndex-1);
                        }
                            result.Add(temp);
                            frontIndex = endIndex;
                        
                    }

                    endIndex++;
                }

                if (frontIndex <=src.Length-1)
                {
                    string temp=string.Empty;
                    if (frontIndex + 1 <= src.Length - 1)
                    {
                        temp = src.Substring(frontIndex + 1);
                    }
                    result.Add(temp);
                }


                return result;
            }
           
        }

        public static string[] SpliteArray(string src, char patChar)
        {
           
            List<string> re= Splite(src,patChar);
            if (re != null)
            {

                return re.ToArray();
            }
            else
            {
                return null;
            }

        }

单元测试如下:

/// <summary>
        ///Splite 的测试
        ///</summary>
        [TestMethod()]
        public void SpliteTest()
        {
            string[] srcList =
            {
                "i  love this game",
                " i  love this game",
                "  i  love this game",
                "i  love this game ",
                "i  love this game  ",
                "i  love this  game",
                "i  love  this game   ",
                "  i  love  this game  ",
                "   i  love  this game   ",
                "i  love  this game",
                "   i  love  this  game   ",
            
            };

            foreach (string src in srcList)
            {
                
                string[] expected = src.Split(' ');
                string[] actual;
                actual = StringMagic.SpliteArray(src, ' ');

                bool equal = true;
                for (int i = 0; i < expected.Length; i++)
                {
                    if (expected[i] != actual[i])
                    {
                        equal = false;
                        break;
                    }
                }
                Assert.AreEqual(equal, true);
            }
        }