me_sure_meant 1.0.0

The Visionary Software Solutions Measurement & me_sure_meant API

Visionary Software Solutions Measurement API: fluent, joyful measurement...FOR SCIENCE!

Meant to fight the odious practice witnessed in many code bases of using only integers/doubles for measurements/units and "knowing contextually" that a number corresponds to a measurement in kilograms... (which may be converted in the body of a method).

The goal of this API is to enable code written about measurements to be clear, expressive, and straightforward to reason about and understand by baking behaviors (such as well known conversion factors and arithmetic) directly into types.

Features

• Rich Measurement API enabling definition of Mass, Energy, Temperature, Time, and Volume.
• Common SI, Imperial, and US Customary units.
• Fluent definition, unit conversion, and addition/subtraction.
• Uncertainty in measurement with propagation through calculations.
• Framework pieces to easily extend and evolve, replacing implementations or adding new features
• Full SI prefix support for all your yottagram and quectometre needs
• Extension Methods to make defining a quantity as easy as writing (20.kilograms() - 32.pounds()).toUnit(Gram.milligram)

First Class (No, really, they're dedicated classes!) support for measurements in:

1. Energy
   • SI : Joules and KiloCalories
2. Length
   • Imperial: Inches, Hands, Feet, Yards, Chains, Furlongs, Miles, Leagues
   • SI: Metre
3. Mass
   • SI: Kilogram (as Grams)
   • Imperial: Ounces, Pounds, Stones, Tons (Long)
4. Temperature
   • SI: Kelvins, DegreesCelsius
   • Imperial: DegreesFahrenheit
5. Time
   • SI: Seconds, Minutes, Hours, Days
6. Volume (Liquid)
   • SI: Litres
   • Imperial: ImperialFluidOunces, Gills, ImperialPints, ImperialQuarts, ImperialGallons
   • US Customary: Teaspoons, Tablespoons, USFluidOunces, Shots, Cups, USPints, USQuarts, USGallons

Also note that the package is built using Best Practice software engineering principles. The code is meant to be as SOLID as possible (thanks Uncle Bob!) with Stable Abstractions that work interchangeably (don't like Crude or BasicUncertainty Measurements? Roll your own!). DECORATOR for SI MetricPrefix was an obviously nice win I'm surprised I haven't seen done more. The library has test coverage and planned seams for modularization once the basics are proven out.

Getting started

No prerequisites. This package is "platform"/foundational. It should work in any Dart 3+ runtime environment.

Usage

Check out the demos in example/measurement_example.dart

Here's a teaser

 /// and the big payoff is that you can do complicated things simply
final mess = (32.inches() + 24.yards() + 3.miles() - 2.kilometres())
    .toUnit(Metre.decimetre);

/// Do you have any idea what this is? I didn't!
print(mess);

Additional information

This package is Free and Open Source Software by Visionary Software Solutions. Alternative licensing is available, on a sliding scale case-by-case basis. (Contact nico at visionary.software)

• Repo: https://bitbucket.org/byterz/me_sure_meant
• Jira: https://bitbucket.org/byterz/me_sure_meant/jira?site=8558cf93-d5dd-4d50-b3cd-6ce38db332e9&statuses=new&statuses=indeterminate&sort=-updated&page=1
• License: GPLv3