Module: Quantify::ExtendedMethods

Included in:
Unit, Unit::Base
Defined in:
lib/quantify/quantify.rb

Instance Method Summary collapse

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method, *args, &block) ⇒ Object

Provides syntactic sugar for accessing units via the #for method. Specify:

Unit.degree_celsius

rather than Unit.for :degree_celsius



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# File 'lib/quantify/quantify.rb', line 16

def method_missing(method, *args, &block)
  if method.to_s =~ /((si|non_si|compound)_)?(non_(prefixed)_)?((base|derived|benchmark)_)?units(_by_(name|symbol|label))?/
    if $2 || $4 || $6
      conditions = []
      conditions << "unit.is_#{$2}_unit?" if $2
      conditions << "!unit.is_prefixed_unit?" if $4
      conditions << "unit.is_#{$6}_unit?" if $6
      units = Unit.units.select { |unit| instance_eval(conditions.join(" and ")) }
    else
      units = Unit.units
    end
    return_format = ( $8 ? $8.to_sym : nil )
    units.map(&return_format).to_a
  elsif unit = Unit.for(method)
    return unit
  else
    super
  end
end