I have an ArrayList of email addresses. I want to remove duplicates from it.
For example my array list is:
I want output like this
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3Which address should remain? The first one? – user1781290 Aug 10 '19 at 06:34
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1What you have tried? – Prashant Pimpale Aug 10 '19 at 06:36
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Post a minimal code fragment of your problem. Have a look at [writing the perfect question](https://codeblog.jonskeet.uk/2010/08/29/writing-the-perfect-question). – Jeroen Heier Aug 10 '19 at 06:37
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@user1781290, I need any distinct domain of this email address list – NKS Aug 10 '19 at 06:38
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There are actually no dulplicates in the example you gave. Do you mean *Select all email addresses that have the same name?* – preciousbetine Aug 10 '19 at 06:39
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1@Prashant Pimpale, I didn't getting any logic of this query – NKS Aug 10 '19 at 06:40
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1@preciousbetine, Domain should not be duplicate in whole list, that's my query. – NKS Aug 10 '19 at 06:43
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1Possible Duplicate of https://stackoverflow.com/questions/33849021/interleave-an-array-of-email-addresses-avoiding-items-with-same-domain-to-be-con Including your own logic! – Prashant Pimpale Aug 10 '19 at 06:46
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1Side note: these days, I'd recommend **against** using `ArrayList` - use a `List
` instead, this avoids having to constantly box and unbox values to and from `object` for each access..... – marc_s Aug 10 '19 at 06:56 -
@PrashantPimpale I reviewed the question. It is different somehow. – Salah Akbari Aug 10 '19 at 06:58
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@SalahAkbari yes that's why added this: `Including your own logic` for OP – Prashant Pimpale Aug 10 '19 at 07:41
1 Answers
2
Something like this:
ArrayList arr = new ArrayList { "[email protected]", "[email protected]",
"[email protected]", "[email protected]" };
var res = arr.ToArray().GroupBy(c => c.ToString().Split('@')[1])
.Select(c=> c.FirstOrDefault()).ToArray();
I used an ArrayList to adjust with your question, but it would be better to use a List or Array of string instead.
Salah Akbari
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