Algorithm to remove duplicates from an array.

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1.00/5 (2 votes)

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Algorithm to remove duplicates from an array.

Example :
array having duplicate country names Like
(‘India’,’Pakistan’,United states ofAmerica’,’Germany’,’Pakistan’,’England’,’Ireland’,’India’).

(A windows form can be developed to demonstrate this)

Posted 11-Apr-12 3:02am

prabakaransat

Updated 11-Apr-12 3:33am

fjdiewornncalwe

v2

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wizardzz 12-Apr-12 11:45am

Um, this should be simple for anyone who is familiar with logic, or the use of their brain. What have you tried? I feel this is only HW. Goodluck keeping a real job.

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Lakamraju Raghuram · Answer 1 · 2012-04-11T03:07:00

Solution 1

I suppose this is not your homework.
Any way I wont give direct code, check out the details/options here

http://stackoverflow.com/questions/9673/remove-duplicates-from-array[^]

Posted 11-Apr-12 3:07am

Lakamraju Raghuram

Comments

Sergey Alexandrovich Kryukov 11-Apr-12 20:48pm

Essentially, exact same thing as the one written by VJ; my 5, too.
--SA

VJ Reddy · Answer 2 · 2012-04-11T03:12:00

Solution 2

Distinct extension method of IEnumerable Interface can be used for this purpose.

C#

string[] Countries = {
    "India", "Pakistan", "United States of America", "Germany",
    "Pakistan", "England", "Ireland", "India"};
var query = Countries.Distinct();
var distinctCountries = query.ToArray();

The IEqualityComparer<T> parameter can be supplied for controlling comparison of strings.

Posted 11-Apr-12 3:12am

VJ Reddy

Updated 11-Apr-12 14:40pm

v4

Comments

Sergey Alexandrovich Kryukov 11-Apr-12 20:43pm

I only fixed the spelling and capitalization for the 3rd country (pun unintended :-) and formatting of the generic declaration -- you probably forgot to escape angular brackets using HTML character entities < and >. By the way, the menu item "encode" on top of text area helps to do that.

The answer itself got my 5; I think this kind of extension methods is an elegant thing.
After all, who needs yet another India and one more Pakistan? :-)
--SA

VJ Reddy 11-Apr-12 20:57pm

Thank you very much, SA, for correction and your comment. Thank you for the suggestion regarding HTML character entities.