quantify 0.3.0 copy "quantify: ^0.3.0" to clipboard
quantify: ^0.3.0 copied to clipboard

Published 3 months ago • verified publisherphilippgerber.li• Latest: 0.12.0
[unknown platforms]
→

Metadata

A type-safe units of measurement library for Dart, providing elegant syntax for unit conversions with good precision, optimal performance, and configurable output formatting.

More...

Changelog #

All notable changes to the quantify package will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

0.3.0 #

2025-06-21

Added #

  • Expanded Unit Coverage:
    • Length:
      • SI Prefixes: hm (hectometer), dam (decameter), dm (decimeter), μm (micrometer), nm (nanometer), pm (picometer), fm (femtometer).
      • Astronomical: AU (astronomical unit), ly (light year), pc (parsec).
      • Special: Å (ångström).
    • Mass:
      • SI Prefixes: hg (hectogram), dag (decagram), dg (decigram), cg (centigram), μg (microgram), ng (nanogram).
      • Imperial/US: short ton, long ton.
      • Special: u (atomic mass unit), ct (carat).
    • Time:
      • SI Prefixes: μs (microsecond), ns (nanosecond), ps (picosecond).
      • Calendar: wk (week), mo (month), yr (year).
    • Temperature:
      • Absolute Scale: °R (rankine).

0.2.0 #

2025-06-16

Added #

  • New SI Base Quantity Types (completing all 7 SI base units):
    • Mass:
      • Mass class and MassUnit enum (kg, g, mg, t (tonne), lb, oz, st (stone), slug).
    • Amount of Substance (Molar Amount):
      • MolarAmount class and MolarUnit enum (mol, mmol, µmol, nmol, pmol, kmol).
    • Electric Current:
      • Current class and CurrentUnit enum (A, mA, µA, nA, kA).
    • Luminous Intensity:
      • LuminousIntensity class and LuminousIntensityUnit enum (cd, mcd, kcd).

0.1.0 #

2025-06-12

Added #

  • Initial Release of quantify v0.1.0
  • Core Functionality:
    • Type-safe Quantity base class for representing physical quantities with a value and a unit.
    • Unit interface for defining conversion factors and symbols.
    • Immutable Quantity objects.
    • double precision for quantity values.
    • Elegant API with extension methods on num for quantity creation (e.g., 10.m, 20.celsius).
    • Extension methods on Quantity for easy value retrieval in target units (e.g., length.inKm) and for obtaining new Quantity objects in target units (e.g., length.asKm).
    • Configurable toString() method on Quantity objects supporting:
      • Conversion to a targetUnit before formatting.
      • Fixed fractionDigits.
      • Option to showUnitSymbol.
      • Custom unitSymbolSeparator.
      • Locale-aware number formatting via locale parameter (using intl package).
      • Full control over number formatting via numberFormat parameter (using intl package).
    • Arithmetic operations (+, -, * by scalar, / by scalar) for most quantities.
    • Specialized arithmetic for Temperature (difference T - T returns double, ratio T / T returns double).
    • Comparable interface implementation for sorting quantities by magnitude.
    • == operator override for value and unit equality.
  • Supported Quantity Types (with units and extensions):
    • Length: Meter (m), Kilometer (km), Centimeter (cm), Millimeter (mm), Inch (in), Foot (ft), Yard (yd), Mile (mi), Nautical Mile (nmi).
    • Time: Second (s), Millisecond (ms), Minute (min), Hour (h), Day (d).
    • Temperature: Kelvin (K), Celsius (°C), Fahrenheit (°F). Handles affine conversions correctly.
    • Pressure: Pascal (Pa), Atmosphere (atm), Bar (bar), PSI (psi), Torr, mmHg, inHg, kPa, hPa, mbar, cmH₂O, inH₂O.

← Metadata

10
likes
0
points
68
downloads

Publisher

verified publisherphilippgerber.li

Weekly Downloads

Metadata

A type-safe units of measurement library for Dart, providing elegant syntax for unit conversions with good precision, optimal performance, and configurable output formatting.

Repository (GitHub)
View/report issues

Topics

#units #unit-converter #measurement #conversion #physics

License

unknown (license)

Dependencies

intl, meta

More

Packages that depend on quantify

Back