CODEWITHSUNDEEP
c#
palindrome88
palindrome88

Reputation: 95

Printing list of objects

I have the below class, how do I print the list of objects in format [1,[2,3,8],[[]],10,[]] in C#?

public class InnerList
{
    private int val;
    private boolean isValue;
    private List<InnerList> intList;
}
public string ConvertToString()
{
    if (this.isValue)
    {
        return this.val + "";
    }
    else
    {
        return this.intList.ToString();
    }
}

In my caller, I will use something like below to print the list of objects in format [1,[2,3,8],[[]],10,[]]

System.out.println(list);

My question is how to achieve this in c#?

Upvotes: 0

Views: 103

Answers (3)

Slava Utesinov
Slava Utesinov

Reputation: 13488

Solution:

public class InnerList
{
    //public only for simple initialization at usage example
    public int val;
    public bool isValue;
    public List<InnerList> intList;

    public override string ToString()
    {
        if (isValue)            
            return val.ToString();                
        return String.Format("[{0}]", intList == null ? "" : String.Join(", ", intList.Select(x => x.ToString())));
    }
}

Usage:

var test = new InnerList
{
    intList = new List<InnerList>  {
        new InnerList { isValue = true, val = 1 },
        new InnerList { isValue = true, val = 2 },
        new InnerList
        {
            intList = new List<InnerList>  {
                new InnerList { isValue = true, val = 13 },
                new InnerList { isValue = true, val = 23 },
                new InnerList()
            }
        }
    }
};
Console.WriteLine(test);//[1, 2, [13, 23, []]]

Upvotes: 1

Jesse de Wit
Jesse de Wit

Reputation: 4177

It looks like you might run into the problem of circular them references here. Because an InnerList could reference its own parent in its intList. That is why I would recommend a serializer to do the job for you. It knows how to handle these circular references. I'm using Newtonsoft.Json here.

public override string ToString() 
{
    var settings = new JsonSerializerSettings();
    settings.PreserveReferencesHandling = PreserveReferencesHandling.All;
    return JsonConvert.SerializeObject(this, settings);
}

Upvotes: 0

user4074041
user4074041

Reputation:

Welcome to C# world!

I can't understand what you trying to do, but i can show you how we do in by C#:

  public class InnerList
    {
        public int Value
        {
            get
            {
                return this.intList.Count;
            }
        }

        public bool HasValue { get; set; }

        private List<InnerList> intList;

        public static implicit operator string(InnerList list)
        {
            return list.ToString();
        }

        public override string ToString()
        {
            if (this.HasValue)
            {
                return this.Value.ToString();
            }
            else
            {
                return this.intList.ToString();
            }
        }
    }

Upvotes: 0

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