/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

1 vote259 views1 answer
Rspec expect to receive multiple times
Ruby
0 vote252 views2 answers
What does inject in ruby do
Ruby
0 vote253 views1 answer
Helper path outside view
Ruby
6 votes497 views1 answer
Contains ruby array
Ruby
0 vote224 views1 answer
Text_field_tag transfer params rails
Ruby
0 vote239 views1 answer
Font awesome icon rails submit button
Ruby
1 vote236 views1 answer
Ruby filter
Ruby
0 vote217 views1 answer
Encryption and decryption in rails
Ruby
3 votes265 views1 answer
Ruby string contains
Ruby
0 vote265 views1 answer
Rails ngrok blocked host
Ruby