Class: Charisma::Measurement Abstract

Inherits:

Object

• Object
• Charisma::Measurement

show all

Defined in:

lib/charisma/measurement.rb,
lib/charisma/measurement/time.rb,
lib/charisma/measurement/mass.rb,
lib/charisma/measurement/speed.rb,
lib/charisma/measurement/length.rb

Overview

Defined Under Namespace

Classes: Length, Mass, Speed, Time

Constant Summary

Velocity =

Velocity is an SI-accepted alias for speed

Speed

Instance Attribute Summary (collapse)

• - (Object) value readonly

  The quantity of the measured value.

Class Method Summary (collapse)

• + (Symbol) unit

  Retrive the units used by the measurement.

• + (String) unit_abbreviation

  Retrieve the abbreviation of the units used by the measurement.

• + (Object) units(units)

  Define the units used with this measurement.

Instance Method Summary (collapse)

• - (Object) as_json

  Provide a hash for later conversion to JSON.

• - (Measurement) initialize(value) constructor

  Create a new instance of this measurement.

• - (Object) method_missing(*args)

  Handle conversion methods.

• - (Fixnum) to_f

  Return just the quantity of the measurement.

• - (Object) to_hash

  Provide a hash form.

• - (String) to_s

  Show the measured value, along with units.

• - (String) u

  The standard abbreviation for the measurement's units.

• - (Symbol) units

  The measurement's units.

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# File 'lib/charisma/measurement.rb', line 15

def initialize(value)
  @value = value
end

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# File 'lib/charisma/measurement.rb', line 44

def method_missing(*args)
  if Conversions.conversions[units.to_sym][args.first]
    to_f.send(units.to_sym).to(args.first)
  else
    super
  end
end

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# File 'lib/charisma/measurement.rb', line 8

def value
  @value
end

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# File 'lib/charisma/measurement.rb', line 73

def unit
  @units
end

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# File 'lib/charisma/measurement.rb', line 79

def unit_abbreviation
  @units_abbreviation
end

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# File 'lib/charisma/measurement.rb', line 67

def units(units)
  @units, @units_abbreviation = units.to_a.flatten
end

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# File 'lib/charisma/measurement.rb', line 58

def as_json
  to_hash
end

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# File 'lib/charisma/measurement.rb', line 27

def to_f
  value.to_f
end

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# File 'lib/charisma/measurement.rb', line 53

def to_hash
  { :value => value, :units => units.to_s }
end

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# File 'lib/charisma/measurement.rb', line 21

def to_s
  "#{NumberHelper.delimit value} #{u}"
end

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# File 'lib/charisma/measurement.rb', line 39

def u
  self.class.unit_abbreviation
end

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# File 'lib/charisma/measurement.rb', line 33

def units
  self.class.unit
end