# measurements #

A package providing basic classes for working with measurements such as Length and Mass. All provided classes provide the means to perform conversions, calculations and comparisons using objects.

## Example #

Conversions:

``````import 'package:measurements/measurements.dart';

void main(List<String> arguments) async {
Length heightOfEverest = Length.fromMetres(8848);
print("Height of Everest (in metres): \${heightOfEverest.inMetres}.");
print("Height of Everest (in kilometres): \${heightOfEverest.inKilometres}.");
print("Height of Everest (in yards): \${heightOfEverest.inYards}.");
print("Height of Everest (in miles): \${heightOfEverest.inMiles}.");
}
``````

Calculations:

``````import 'package:measurements/measurements.dart';

void main(List<String> arguments) async {
Length a = Length.fromCentimetres(87);
Length b = Length.fromCentimetres(43);
print("a + b is \${(a + b).inCentimetres} centimetres");//130
print("a - b is \${(a - b).inCentimetres} centimetres.");//44
print("a * b is \${(a * b).inCentimetres} centimetres.");//3741
print("a / b is \${(a / b).inCentimetres} centimetres.");//2.02325581395
}
``````

Comparisons:

``````import 'package:measurements/measurements.dart';

void main(List<String> arguments) async {
Mass elephantWeight = Mass.fromKilograms(5400);
Mass zebraWeight = Mass.fromKilograms(380);
if (elephantWeight == zebraWeight) {
print("An elephant and a Zebra have the same weight.");
} else if (zebraWeight < elephantWeight) {
Mass difference = elephantWeight - zebraWeight;
print("An elephant is \${difference.inPounds} pounds heavier than a zebra.");
} else {
Mass difference = zebraWeight - elephantWeight;
print("A Zebra is \${difference.inPounds} pounds heavier than an elephant.");
}
}
``````

## Available Measurements #

The available classes as well as those that will hopefully be implemented soon are listed below. If you are willing to speed up the process of implementing missing functionality, contributions are most welcome.

• [x] Length
• [x] Mass
• [ ] Area
• [ ] DataTransferRate
• [ ] DigitalStorage
• [ ] Energy
• [ ] Frequency
• [ ] Pressure
• [ ] Speed
• [ ] Temperature
• [ ] Volume

## Contributing #

There are couple of ways in which you can contribute.

• Propose any feature, enhancement
• Report a bug
• Fix a bug
• Participate in a discussion and help in decision making
• Write and improve some documentation. Documentation is super critical and its importance cannot be overstated!
• Send in a Pull Request :-)

## 0.0.1 #

• Initial Release

## 0.0.2 #

• Corrected ounces for `Mass` class
• Fixed overloaded `==` operator

example/main.dart

``````import 'package:measurements/measurements.dart';

void main(List<String> arguments) async {
print("Some interesting measurements...");

// Conversion
Length heightOfEverest = Length.fromMetres(8848);
print("Height of Everest (in metres): \${heightOfEverest.inMetres}.");
print("Height of Everest (in kilometres): \${heightOfEverest.inKilometres}.");
print("Height of Everest (in yards): \${heightOfEverest.inYards}.");
print("Height of Everest (in miles): \${heightOfEverest.inMiles}.");

// Calculation
Length a = Length.fromCentimetres(87);
Length b = Length.fromCentimetres(43);
print("a + b is \${(a + b).inCentimetres} centimetres");//130
print("a - b is \${(a - b).inCentimetres} centimetres.");//44
print("a * b is \${(a * b).inCentimetres} centimetres.");//3741
print("a / b is \${(a / b).inCentimetres} centimetres.");//2.02325581395

// Comparison
Mass elephantWeight = Mass.fromKilograms(5400);
Mass zebraWeight = Mass.fromKilograms(380);
if (elephantWeight == zebraWeight) {
print("An elephant and a Zebra have the same weight.");
} else if (zebraWeight < elephantWeight) {
Mass difference = elephantWeight - zebraWeight;
print("An elephant is \${difference.inPounds} pounds heavier than a zebra.");
} else {
Mass difference = zebraWeight - elephantWeight;
print("A Zebra is \${difference.inPounds} pounds heavier than an elephant.");
}
}
``````

## Use this package as a library

### 1. Depend on it

``````
dependencies:
measurements: ^0.0.2

``````

### 2. Install it

You can install packages from the command line:

with pub:

``````
\$ pub get

``````

with Flutter:

``````
\$ flutter pub get

``````

Alternatively, your editor might support `pub get` or `flutter pub get`. Check the docs for your editor to learn more.

### 3. Import it

Now in your Dart code, you can use:

``````
import 'package:measurements/measurements.dart';
``````
 Popularity: Describes how popular the package is relative to other packages. [more] 0 Health: Code health derived from static analysis. [more] 100 Maintenance: Reflects how tidy and up-to-date the package is. [more] 90 Overall: Weighted score of the above. [more] 48

We analyzed this package on Jan 16, 2020, and provided a score, details, and suggestions below. Analysis was completed with status completed using:

• Dart: 2.7.0
• pana: 0.13.4

#### Health suggestions

Format `lib/measurements.dart`.

Run `dartfmt` to format `lib/measurements.dart`.

#### Maintenance suggestions

Package is pre-v0.1 release. (-10 points)

While nothing is inherently wrong with versions of `0.0.*`, it might mean that the author is still experimenting with the general direction of the API.

#### Dependencies

Package Constraint Resolved Available
Direct dependencies
Dart SDK >=2.1.0 <3.0.0
Dev dependencies
test ^1.11.0