## Arranging an array so that duplicates will turn up first

Arranging an array so that duplicates will turn up first
# 1
01-24-2008
Arranging an array so that duplicates will turn up first

Hi All,

I have an array that contains duplicates as well unique numbers.
ex- (21, 33, 35, 21, 33, 70, 33, 35, 50)

I need to arrange it in such a way that all the duplicates will come up first followed by unique numbers.

Result for the given example should be:
(21, 21, 33, 33, 35, 35, 70, 50)

This a trivial problem in C, creating a binary search tree from the array solves the problem.

As I am new to Perl I don't know indepth of the language.
Would appreciate any help on this regard.

~Ashim
 ashim View Public Profile for ashim Find all posts by ashim
# 2
01-24-2008
why bother with constructing binary search tree yourself when Perl provides an easy solution:
 Yogesh Sawant View Public Profile for Yogesh Sawant Visit Yogesh Sawant's homepage! Find all posts by Yogesh Sawant
# 3
01-24-2008
I _think_ the OP wants:

not:

 radoulov View Public Profile for radoulov Find all posts by radoulov
# 4
01-24-2008
Yes, what I really want is all the duplicate members followed by unique numbers without any relational order consideration.

So the Sorting might give a correct solution for this example.

But it is not a generic one.It may happen that a duplicate number is present that is greater than an unique number
 ashim View Public Profile for ashim Find all posts by ashim
# 5
01-24-2008
if you are not a newbie to Perl, this will guide you to achieve what you want
edit: i was being paranoid here.

this may be more appropriate

Last edited by Yogesh Sawant; 01-24-2008 at 12:18 PM..
 Yogesh Sawant View Public Profile for Yogesh Sawant Visit Yogesh Sawant's homepage! Find all posts by Yogesh Sawant

Test Your Knowledge in Computers #613
Difficulty: Medium
Examples of complex numbers in Python are (-5+4j) and (2.3 - 4.6j).
True or False?

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