Distinct

Ruby
1

hello,

a little question… how to get distinct values from an hash?

ex:
hash = {“a”=>100, “b”=>200, “d”=>100, “d”=>200}
==> hash_with_distinct_values = [100, 200]

thanks.

2

Jean-Sébastien wrote:

hello,

a little question… how to get distinct values from an hash?

ex:
hash = {“a”=>100, “b”=>200, “d”=>100, “d”=>200}
==> hash_with_distinct_values = [100, 200]
hash.values.uniq is the simplest.

3

On Fri, Apr 13, 2007 at 12:55:06AM +0900, Jean-S?bastien wrote:

a little question… how to get distinct values from an hash?

ex:
hash = {“a”=>100, “b”=>200, “d”=>100, “d”=>200}
==> hash_with_distinct_values = [100, 200]

irb(main):001:0> hash = {“a”=>100, “b”=>200, “d”=>100, “d”=>200}
=> {“a”=>100, “b”=>200, “d”=>200}
irb(main):002:0> hash.invert.keys
=> [100, 200]

4

On Apr 12, 11:54 am, “Jean-Sébastien” [email protected]
wrote:

hello,

a little question… how to get distinct values from an hash?

ex:
hash = {“a”=>100, “b”=>200, “d”=>100, “d”=>200}
==> hash_with_distinct_values = [100, 200]

thanks.

irb(main):001:0> hash = {“a”=>100, “b”=>200, “d”=>100, “d”=>200}
=> {“a”=>100, “b”=>200, “d”=>200}
irb(main):002:0> hash.values.uniq
=> [100, 200]

5

On 4/12/07, Brian C. [email protected] wrote:

=> [100, 200]

I would have completely agreed with hash.values.uniq as the simplest
solution, but has.invert.keys is extremely surprising, thx Brian.

Robert