Method: Units::Measure#in

Defined in:

lib/units/measure.rb

#in(other, mode = :absolute) ⇒ Object

# File 'lib/units/measure.rb', line 193

def in(other, mode=:absolute)
  other = Units.units(other) if other.kind_of?(String)
  other = Measure.new(1.0, other) unless other.kind_of?(Measure)
  other = other.base
  this = self.base
  dims = this.units.keys | other.units.keys
  mag = this.magnitude/other.magnitude
  dims.each do |dim|
    if !this.units[dim] || !other.units[dim] ||
       (this.units[dim].last != other.units[dim].last)
      raise "Inconsistent units #{Units.units_descr(this.units)} #{Units.units_descr(other.units)}"
    end
    this_u, mult = this.units[dim]
    other_u = other.units[dim].first
    mag *= Units.conversion_factor(this_u, other_u)**mult
  end
  if mode!=:relative && dims.size==1 && this.units[dims.first].last==1
    # consider "level" conversion for biased units (otherwise consider interval or difference values)
    mag += Units.conversion_bias(this.units[dims.first].first, other.units[dims.first].first)
  end
  mag
end