Show a string of certain length without truncating

Question

I am displaying a string of certain length in ruby. only 80 characters of that string can be displayed in one line. for example if string length is 82 then it will be shown

Answer 1

Just out of curiosity:

loop.inject([[], input]) do |(acc, src)|
  if m = src[/.{1,79}(\s|\z)/]
    [acc << m, $']
  else
    break acc << src
  end
end