CODEWITHSUNDEEP
c#arrays
Vishwas Joshi
Vishwas Joshi

Reputation: 43

String Arrays in c#. Removing elements from one string array which are their in another string array

I have two string arrays -

            string[] One = new string[3];

            One[0] = "Pen";          
            One[1] = "Pencil";          
            One[2] = "card";

and,

            string[] Two = new string[2];

            Two[0] = "card";          
            Two[1] = "drive";

Now, I want a new string array from these two, such that the final result does not contain any element of the Two array. i.e. it should have, "Pen", "Pencil" only.

Upvotes: 1

Views: 1420

Answers (3)

Pashupati Khanal
Pashupati Khanal

Reputation: 743

This simple linq query can give you result.

var res = One.Except(Two);

Further, if in case you need to ignore case, use overload version of above method as:

var res = One.Except(Two, StringComparer.OrdinalIgnoreCase);

OR, Equivalently.

var res  = One.Where(x=>!Two.Contains(x)).ToArray();

Upvotes: 5

Athanasios Kataras
Athanasios Kataras

Reputation: 26362

You need something like non-intersect

         string[] One = new string[3];

            One[0] = "Pen";          
            One[1] = "Pencil";          
            One[2] = "card";

        string[] Two = new string[2];

            Two[0] = "card";          
            Two[1] = "drive";

        var nonintersectOne = One.Except(Two);   
        foreach(var str in  nonintersectOne)
           Console.WriteLine(str);

        // Or if you want the non intersect from both
        var nonintersectBoth = One.Except(Two).Union(Two.Except(One)).ToArray();
        foreach(var str in  nonintersect)
           Console.WriteLine(str);

Output 1:

Pen

Pencil

Output 2:

Pen

Pencil

drive

Upvotes: 1

Dan T.
Dan T.

Reputation: 425

You can use Linq -

var res = One.Where(x => Two.Find(x) == null);

Or even better:

        string[] One = new string[3];

        One[0] = "Pen";
        One[1] = "Pencil";
        One[2] = "card";
        string[] Two = new string[2];

        Two[0] = "card";
        Two[1] = "drive";

        var res = One.Except(Two);

Upvotes: 4

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