Humanizes numbers.
$ gem install humanize-number
require "humanize-number"
HumanizeNumber.humanize(-20) # "-20"
HumanizeNumber.humanize(123) # "123"
HumanizeNumber.humanize(1234) # "1.23k"
HumanizeNumber.humanize(12345) # "12.3k"
HumanizeNumber.humanize(123456) # "123k"
HumanizeNumber.humanize(1234567) # "1.23m"
HumanizeNumber.humanize(12345678) # "12.3m"
HumanizeNumber.humanize(123456789) # "123m"
HumanizeNumber.humanize(1234567890) # "1.23b"
HumanizeNumber.humanize(12345678901) # "12.3b"
HumanizeNumber.humanize(123456789012) # "123b"
HumanizeNumber.humanize(1234567890123) # "1235b"
HumanizeNumber.humanize(12345678901234) # "12346b"