ribs_units

ribs_units is a type-safe library for working with dimensional quantities and units of measure in Dart. Heavily inspired by Squants, it provides an expressive API for handling physical and digital quantities while preventing common "unit mismatch" bugs.

Features

• Extensive Unit Support: Includes core domains like Space (Length, Area, Volume, Angle), Time (Time, Frequency), Information (Data Storage, Data Rate), Mass, Thermal (Temperature), and Motion (Velocity).
• Clean DSL: Uses Dart extension methods to allow intuitive syntax like 10.meters or 5.megabytes.
• Type Safety: Prevents mixing different quantities (e.g., adding meters to seconds) at compile time.
• Unit Conversions: Effortlessly convert between units within the same quantity.
• String Parsing: Robust parsing of quantity strings (e.g., "1.5 km", "1024 MiB").

Why ribs_units?

1. Self-Documenting Code: Instead of double timeoutSeconds, use Time timeout.
2. Precision & Safety: Avoid off-by-one errors or unit conversion mistakes (e.g., milliseconds vs. seconds).
3. Immutability: All quantities are immutable, making them safe for concurrent or complex logic.
4. Integration: Built to work as part of the larger ribs ecosystem.

Quick Examples

Creating Quantities

final length = 10.kilometers;
final duration = 15.minutes;

Conversions

// Convert to a base value in specific units
final distanceInMeters = length.to(Length.meters); 
print(distanceInMeters); // 10000.0

final temp = 32.fahrenheit;
print(temp.toCelsius); // 0.0 °C

Dimensional Arithmetic

Some quantities support dimensional operations where appropriate:

final area = 10.meters * 5.meters; // Returns Area
final volume = area * 2.meters;    // Returns Volume

String Parsing

final parsed = Information.parse("1.5 GiB").getOrElse(() => throw "Invalid input");
print(parsed.toMegabytes);