Trying to understand the Ruby .chr and .ord methods

According to Integer#chr you can use the following to force the encoding to be UTF_8.

22909.chr(Encoding::UTF_8)
#=> "好"

To list all available encoding names

Encoding.name_list
#=> ["ASCII-8BIT", "UTF-8", "US-ASCII", "UTF-16BE", "UTF-16LE", "UTF-32BE", "UTF-32LE", "UTF-16", "UTF-32", ...]

A hacky way to get the maximum number of characters

2000000.times.reduce(0) do |x, i|
  begin
    i.chr(Encoding::UTF_8)
    x += 1
  rescue
  end

  x
end
#=> 1112064

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