Modify string and add new string

Question

I'm having the string value 740D1E11625C89019E61D0CC I want to insert "-" in string after every count 5 length.

I'm using

ReplaceAt(serial, 5, 0, "-");


public static string ReplaceAt(string str, int index, int length, string replace)
        {
            return str.Remove(index, Math.Min(length, str.Length - index))
                    .Insert(index, replace);
        }

Result

740D1-E11625C89019E61D0CC

It should be

740D1-E1162-5C890-19E61-D0CC

Is this right way to modify string ?

Soner Gönül · Answer 1 · 2016-01-18T07:40:23.167

1

You can use Batch from MoreLINQ. It has a Nuget package as well.

var s = "740D1E11625C89019E61D0CC";
var array = s.Batch(5, seq => new string(seq.ToArray()));
Console.WriteLine(string.Join("-", array));

prints

740D1-E1162-5C890-19E61-D0CC

edited Jan 18 '16 at 07:40

answered Jan 18 '16 at 07:32

Soner Gönül

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You might want to add that answer on the duplicate target. Very nice way to solve this. – Patrick Hofman Jan 18 '16 at 07:34
@PatrickHofman I think this solution _might_ not be a good answer for the duplicate question because it wants `,` at the end as well but `Batch` does not provide this. `string.Join("-", array) + "-"` will solve this but it will be too custom I think. – Soner Gönül Jan 18 '16 at 07:39
Okay, then +1 will do here :) – Patrick Hofman Jan 18 '16 at 07:40

Modify string and add new string

1 Answers1