Module: Unodos::Formatter

Defined in:
lib/unodos/formatter.rb

Class Method Summary collapse

Class Method Details

.format(n, wrap: false) ⇒ Object 



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# File 'lib/unodos/formatter.rb', line 12

def self.format(n, wrap: false)
  return '0' if n == 0
  if n.imag == 0
    format_rational n.real, wrap: wrap
  elsif n.real == 0
    format_rational(n.imag, wrap: true) + 'i'
  else
    r = format_rational(n.real)
    i = format_rational(n.imag, wrap: true)
    s = r + (n.imag > 0 ? '+' : '') + i + 'i'
    s = "(#{s})" if wrap
    s
  end
end

.format_rational(n, wrap: false) ⇒ Object 



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# File 'lib/unodos/formatter.rb', line 2

def self.format_rational(n, wrap: false)
  return '0' if n == 0
  return n.inspect unless n.is_a? Rational
  return n.numerator.inspect if n.denominator == 1
  s = "#{n.numerator.abs}/#{n.denominator}"
  s = "(#{s})" if wrap
  s = '-' + s if n < 0
  s
end