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manipulate string collection using linq

Posted on 2013-11-04
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Last Modified: 2016-02-10
I have a collection List<string>

Orders.Order_Details.Product.Supplier
Orders.Order_Details
Orders
Orders.Employee


how to format the data into like the following using linq or other method


Orders.Order_Details.Product.Supplier
Orders.Employee
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Question by:eoswin
  • 2
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4 Comments
 
LVL 75

Expert Comment

by:käµfm³d 👽
ID: 39622201
Your question is unclear. Are you asking how to filter the list to show just those items mentioned in the second half of your post? What "formatting" are you trying to accomplish?
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Author Comment

by:eoswin
ID: 39622219
format is not the correct word.  it is like comparing each row with all other rows

because the 3rd value "Orders" and 2nd value "Orders.Order_Details"
exists in the 1st value "Orders.Order_Details.Product.Supplier"

and 4th value "Orders.Employee" does not exists in any other rows. i will be as it is.

so, results will be like this

Orders.Order_Details.Product.Supplier
Orders.Employee
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LVL 75

Accepted Solution

by:
käµfm³d   👽 earned 2000 total points
ID: 39622443
I believe this is what you are asking (though I'm still not 100% sure of that):

using System;
using System.Collections.Generic;
using System.Linq;

namespace ConsoleApplication178
{
    class Program
    {
        static void Main(string[] args)
        {
            List<string> collection = new List<string>()
            {
                "Orders.Order_Details.Product.Supplier",
                "Orders.Order_Details",
                "Orders",
                "Orders.Employee",
            };

            var query = from outer in collection
                        where !collection.Any(inner => inner.StartsWith(outer) && inner != outer)
                        select outer;

            foreach (var item in query)
            {
                Console.WriteLine(item);
            }

            Console.ReadKey();
        }
    }
}

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Author Closing Comment

by:eoswin
ID: 39622459
thank you
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