Question

My reputation appears as 2,606.

• If I had more, it would look like 15.4k.
• If I had a lot more, it would look like 264k

What’s the best way to display a number in this format using Ruby?

Answer 1

You can do with this simple method:

class Integer
  def pretty_str
    case
    when self < 1000
      to_s
    when self < 10000
      to_s.insert(1, ",")
    when self < 100000
      ("%.1fk" % (self / 1000.0)).sub(".0", "")
    else
      (self / 1000).pretty_str << "k"
    end
  end
end

123.pretty_str       #=> "123"
1234.pretty_str      #=> "1,234"
12345.pretty_str     #=> "12.3k"
123456.pretty_str    #=> "123k"
1234567.pretty_str   #=> "1.234k"
12345678.pretty_str  #=> "12.3kk"