How to get first n elements from Hash in ruby?

Question

I have a Hash and i have sorted it using the values

@friends_comment_count.sort_by{|k,v| -v}

Now i only want to get hash of top five elements .. One way is to use a counter and break when its 5. What is preferred way to do in ruby ?

Thanks

Answer 1

h = { 'a' => 10, 'b' => 20, 'c' => 30 }

# get the first two
p Hash[*h.sort_by { |k,v| -v }[0..1].flatten]

EDITED:

# get the first two (more concisely)
p Hash[h.sort_by { |k,v| -v }[0..1]]

Answer 2

Can't you just do something like:

h = {"test"=>"1", "test2"=>"2", "test3"=>"3"}

Then if you wanted the first 2:

p h.first(2).to_h

Result:

=> {"test"=>"1", "test2"=>"2"}