使用 LINQ 替换特定位置的特定子字符串

Question

我有一个缩写和位置列表，我想替换特定的特定缩写而不是所有缩写。

public class Abbreviation
{
    public int Pos { get; set; }
    public string ShortName { get; set; }
    public string LongName { get; set; }
}
class Program
{
    static void Main(string[] args)
    {
        List<Abbreviation> abbreviations = new List<Abbreviation>();
        abbreviations.Add(new Abbreviation() { Pos = 28, ShortName = "exp.", LongName = "expression" });
        abbreviations.Add(new Abbreviation() { Pos = 38, ShortName = "para.", LongName = "paragraph" });
        abbreviations.Add(new Abbreviation() { Pos = 51, ShortName = "ans.", LongName = "answer" });

        string test = "What is exp.? This is a test exp. in a para. contains ans. for a question";
        abbreviations.ForEach(x => ...); // Need a LINQ expression
        Console.WriteLine(test);
    }
}

如何在 LINQ 中做到这一点？

Answer 1

好的，这个怎么样：

  public static void Main()
    {
        //var search = new Regex(@"spell\ correction", RegexOptions.IgnoreCase);
        //var data = "this is a teit that i see that";

        List<Abbreviation> abbreviations = new List<Abbreviation>();
        abbreviations.Add(new Abbreviation() { Pos = 29, ShortName = "exp.", LongName = "expression" });
        abbreviations.Add(new Abbreviation() { Pos = 39, ShortName = "para.", LongName = "paragraph" });
        abbreviations.Add(new Abbreviation() { Pos = 54, ShortName = "ans.", LongName = "answer" });

        string test = "What is exp.? This is a test exp. in a para. contains ans. for a question";
        var offset = 0;
        abbreviations.ForEach(x => {

            if(test.Substring(x.Pos+ offset, x.ShortName.Length)==x.ShortName)
            {

                test = test.Remove(x.Pos + offset, x.ShortName.Length);
                test= test.Insert(x.Pos  + offset, x.LongName);
                offset += x.LongName.Length - x.ShortName.Length ;
            }

        }); // Need a LINQ expression
        Console.WriteLine(test);
    }

Answer 2

请记住，如果您直接在源中替换缩写词，您要替换的下一个缩写词的位置索引将与您在开始时声明的位置索引不同。所以我认为你需要一些辅助变量来做到这一点。

此外，您的起始索引有点偏离标准。

编辑 - 将 LINQ ForEach 替换为常规的 foreach，这样您就不会使用它不支持的方法产生任何冲突，例如 String.IsNullOrEmpty()

public class Abbreviation
{
    public int Pos { get; set; }
    public string ShortName { get; set; }
    public string LongName { get; set; }
}
class Program
{
    static void Main(string[] args)
    {
        List<Abbreviation> abbreviations = new List<Abbreviation>();
        abbreviations.Add(new Abbreviation() { Pos = 29, ShortName = "exp.", LongName = "expression" });
        abbreviations.Add(new Abbreviation() { Pos = 39, ShortName = "para.", LongName = "paragraph" });
        abbreviations.Add(new Abbreviation() { Pos = 54, ShortName = "ans.", LongName = "answer" });

        string test = "What is exp.? This is a test exp. in a para. contains ans. for a question";

        string temp = "";
        int tempPos = 0;

        foreach (Abbreviation x in abbreviations)
        {
            if (!String.IsNullOrEmpty(test) && (test.Length >= x.Pos + x.ShortName.Length) && test.Substring(x.Pos, x.ShortName.Length) == x.ShortName)
            {
                temp += test.Substring(tempPos, x.Pos) + x.LongName;
            }
            tempPos = x.Pos + x.ShortName.Length;
        }
        Console.WriteLine(temp);
    }
}