numeric_utils 0.4.4

numeric_utils: ^0.4.4 copied to clipboard

Added

• Rational.isCloseTo: New tolerance extension method for Rational that mirrors the double.isCloseTo API
  • Uses dual tolerance (relative + absolute) for consistent API with double.isCloseTo
  • Defaults to RationalConstants.billionth (1e-9) for relative tolerance
  • Defaults to RationalConstants.trillionth (1e-12) for absolute tolerance
• RationalConstants.trillionth: New constant representing 1/1,000,000,000,000

Changed

• Upgraded intl dependency: ^0.19.0 → ^0.20.2
  • This removes the constraint that was blocking downstream users from using newer versions of intl
• Upgraded lints dev dependency: ^5.0.0 → ^6.0.0

Breaking Changes

• Renamed formatting methods to avoid conflicts with the decimal package and improve clarity:
  • toDecimal() → toDecimalString()
  • toPercentage() → toPercentageString()
  • toCurrency() → toCurrencyString()
  • All three methods return formatted strings, and the new names make this explicit

Added

• Package entrypoint: Added lib/numeric_utils.dart as the main library file that exports all public APIs
• Test coverage: Added comprehensive tests for RationalParsing.tryFromString covering success, failure, and null input cases

Fixed

• Removed arbitrary RoundingMode.halfEven restriction from toNearest() - now supports all rounding modes
• Fixed incorrect mode parameter documentation in toCurrency() (parameter was never implemented)
• Added precision notes to all formatting methods (toDecimal, toPercentage, toCurrency) explaining double conversion behavior

Documentation

• Updated README with tryFromString usage examples alongside fromString

Breaking Changes

• Renamed rounding method for clarity and consistency:

  • RationalCommonRoundingExtension.toDecimalPlace(int places) → toNearestDecimal(int decimalPlaces)
  • This aligns with the naming pattern of toNearestHalf(), toNearestThird(), toNearestQuarter(), etc.

• Renamed formatting method for clarity and consistency:

  • RationalFormattingExtension.toDecimalPlaces(int places) → toDecimal(int decimalPlaces)
  • This aligns with the naming pattern of toPercentage() and toCurrency()

• isMultipleOf() behavior change for all numeric types (int, double, BigInt, Rational):

  • Now throws ArgumentError when checking if a number is a multiple of zero
  • Previously returned a boolean value (implementation-dependent)

Added

• RationalPercentageExtension: New extension providing percentage calculation utilities:

  • percentageOf(Rational total): Calculates what percentage this value represents of the total
  • percentChangeOn(Rational baseValue): Applies this value as a percentage change to the base value
  • percentDifferenceFrom(Rational other): Calculates the percentage difference between two values

• New RationalConstants:

  • twoFifths (2/5)
  • threeFifths (3/5)
  • fourFifths (4/5)
  • onePercent (1/100 or 0.01)
  • fivePercent (1/20 or 0.05)
  • tenPercent (1/10 or 0.1)
  • twentyFivePercent (1/4 or 0.25)
  • fiftyPercent (1/2 or 0.5)

Fixed

• Fixed documentation typo in RationalConstants.twentyFifth (was incorrectly labeled as "twentieth")

Documentation

• Added library-level documentation to numeric_constants.dart explaining runtime constant computation
• Added library-level documentation to numeric_extensions.dart describing key features
• Added Performance Notes section to README explaining Rational vs. double trade-offs
• Added Troubleshooting section to README with common issues and solutions
• Added comprehensive Migration Guide to README for v0.4.0 and v0.3.0
• Added financial_calculations.dart example demonstrating real-world financial use cases

Modified

• RationalParsing.tryFromString now handles null inputs and returns null instead of throwing an exception.

Breaking change

• Rational.toPercentage was modified to remove the places parameter and replace it with maxDecimals and minDecimals. maxDecimals is required, minDecimals is defaulted to 0.

Added

• xxxInRangeExtension: New extensions that provide an isInRange method to check if a value is within a specified range (for int, BigInt, double and Rational).
• xxxToleranceExtension: New extensions that provide isWithinTolerance methods to check if a value is within a specified tolerance of another value (for int, BigInt, double and Rational).
• DoubleToleranceExtension: The double version of xxxToleranceExtension also provides an isCloseTo method to check if a double value is close to another value, considering floating-point inaccuracies.
• xxxMultipleOfExtension: Added double and Rational versions of isMultipleOf methods.

Upgraded

• RationalFormattingExtension.toPercentage: Now takes an optional parameter asRatio to determine whether to treat the input as a ratio value (e.g., 33/100 or 0.33) or a value between 0 and 100 (e.g., 33 out of 100). Defaults to true for backward compatibility.

Added

• RationalParsing.tryFromString: A version of RationalParsing.fromString that returns null if parsing fails.

Added

• RationalParsing.fromString: A new utility method that parses strings into Rational objects, supporting the output of Rational.toString (e.g., fractions like "3/4", mixed numbers like "1 3/4") as well as formats parsable by Rational.parse (e.g., integers, decimals, scientific notation). Enables round-trip serialization for JSON and other formats.

Fixed

• Downgraded intl to 0.19.0 due to Flutter pinning

• Initial version of numeric_utils.
• Features:
  • Added RationalRoundingExtension with various rounding methods (rounded, toNearest, etc.).
    • Added RoundingMode enum.
  • Added BigIntRoundedDivisionExtension for rounded division of BigInts.
  • Added RationalFormattingExtension with toDecimalPlaces, toCurrency and toPercentage methods.
  • Added RationalCommonRoundingExtension with toDecimalPlace, toCents, toNearestHalf, toNearestThird, and toNearestQuarter methods.
  • Added BigIntMultipleOfExtension and IntMultipleOfExtension for isMultipleOf methods.
• Constants:
  • Added RationalConstants with common rational values as well as IntConstants and BigIntConstants