Grouping values of a hash or array

Ruby
1

If I’ve got a hash

h = { a => 1, b => 2, c => 1, d => 1 }
Is there an easy way to group the values to come out as 1,2?

Same for an away where [1,2,1,2,3] would come out as 1,2,3. I looked
through Ruby API and couldn’t find anything. Anyone have any suggestions
as to how to go about this?

2

Adrian F. wrote:

If I’ve got a hash

h = { a => 1, b => 2, c => 1, d => 1 }
Is there an easy way to group the values to come out as 1,2?

Same for an away where [1,2,1,2,3] would come out as 1,2,3
^^^^
You’re from the Elmer Fudd school of Ruby programming apparently. :stuck_out_tongue:

I looked
through Ruby API and couldn’t find anything. Anyone have any suggestions
as to how to go about this?

See Array#uniq

Regards,

Dan

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3

:smiley: Thanks for the help!

4

Adrian F. wrote:

If I’ve got a hash

h = { a => 1, b => 2, c => 1, d => 1 }
Is there an easy way to group the values to come out as 1,2?

irb(main):004:0> require ‘set’
=> true
irb(main):006:0> { :a => 1, :b => 2, :c => 1, :d => 1 }.values.to_set
=> #<Set: {1, 2}>
irb(main):007:0> { :a => 1, :b => 2, :c => 1, :d => 1
}.values.to_set.to_a
=> [1, 2]

Same for an away where [1,2,1,2,3] would come out as 1,2,3. I looked
through Ruby API and couldn’t find anything. Anyone have any suggestions
as to how to go about this?

Same as above - or use uniq as has been mentioned already.

robert