/Ruby/Replacing consecutive numbers with dash between first and last in a range

Replacing consecutive numbers with dash between first and last in a range

# Replacing consecutive numbers with dash between first and last in a range
def range_extraction(list)
  list.chunk_while {|i, j| i+1 == j }.map do |a|
    if a.size > 2
      a.first.to_s + "-" + a.last.to_s
    else
      a  
    end
  end.join(',')
end

print range_extraction([-3,-2,-1,2,10,15,16,18,19,20])  # "-3--1,2,10,15,16,18-20"

Similar codes

0 vote240 views1 answer
Ruby format date time
Ruby
0 vote236 views1 answer
Command to install ruby gems
Ruby
1 vote269 views1 answer
Rspec shared examples
Ruby
0 vote218 views2 answers
Ruby delete first element of array
Ruby
0 vote227 views1 answer
True sting to true in rails
Ruby
0 vote245 views1 answer
How to upload a file in capybara spec
Ruby
1 vote244 views1 answer
How to run a ruby file in terminal
Ruby
0 vote240 views1 answer
Max keys from hash ruby
Ruby
1 vote223 views1 answer
Rails foreach
Ruby
0 vote236 views1 answer
Rails generate migration array default value
Ruby