v5.19.0

What's new

• Added US Customary units for square foot (sq_ft), square mile (sq_mi), and square chain (sq_ch).

What's changed

• Changed symbol of units cb (M) and cb (US) to metric_cb and us_cb in length.
• Changed symbol of unit hp (M) to metric_hp in power.
• Changed symbol of unit cwt (US) to us_cwt in weight.

v5.18.0

What's new

• Added unit group for mass flow rate units.
• Added unit group for volumetric flow rate units.

v5.17.0

What's new

• Added new units qr, U, and z in length.
• Added new units qr, fir, and us_qr in weight.
• Added new units dun, sec, and twp in area.
• Added new units st, fir, and pot in volume.

What's changed

• Changed implementation of #units_for! to raise error if the unit system is not defined
  within the unit group.
• Changed symbol of barleycorn length unit.

v5.16.0

What's new

• Added planck units and their conversions.

v5.15.0

What's new

• Added .define_conversion_methods method to define conversion helper methods for units.

v5.14.0

What's new

• Added .define_numeric_methods method to define numeric extension methods for units.

v5.13.0

What's new

• Added Measurement#to_primitive to convert the measurement to the primitive unit.
• Added #cbrt method to calculate cube root of the measurement quantity.
• Added #sqrt method to calculate square root of the measurement quantity.
• Aliased #to_primitive method as #in_primitive and #as_primitive.

v5.12.0

What's new

• Added MissingPrimitiveUnitError error if user tries to convert measurement to
  the primitive unit but it's not set for the unit group.
• Aliased #+ method as #add.
• Aliased #- method as #subtract.
• Aliased #* method as #times and #multiply.
• Aliased #/ method as #divide.

v5.11.1

What's changed

• Moved BaseError to base file for removing uninitialized constant error in reverse dependencies viz.
  unit_measurements-rails and
  composite_unit_measurements.

v5.11.0

What's new

• Added #systems method to return unit systems within the unit group.
• Added #ratio method to calculate the ratio between two units.