roman-numerals

Installation

Using git:

$ git clone [email protected]:joshleaves/roman-numerals.git

Usage

roman-numerals.toArabic(roman)

toArabic() takes a roman number (as a string literal or a string object) and returns a number with the arabic equivalent.

var toArabic = require('roman-numerals').toArabic;
[ 'XLII', new String('XLII') ].forEach(function (x, i) {
    console.log('%d: %s', i, toArabic(x));
});

Will output:

0: 42
1: 42

toArabic() will throw a TypeError when passed a non-string variable and will throw an Error when passed an invalid roman number. Acceptable strings are also "nulla" and "" (that's empty string) which will both return 0.

roman-numerals.toRoman(arabic)

toRoman() takes an arabic number (as a number literal, a number object, a stringed literal number or a stringed object number) and returns a string with the roman equivalent.

var toRoman = require('roman-numerals').toRoman;
[ 42, new Number(42), '42', new String('42')].forEach(function (x, i) {
    console.log('%d: %s', i, toRoman(x));
});

Will output:

0: XLII
1: XLII
2: XLII
3: XLII

toRoman() will throw a TypeError when passed a non-number variable or NaN and will throw an Error when passed a number under 0 or over 3999.

Tests

Unit tests are done using mocha. To run the tests on your machine, install mocha using npm and run make test or npm test.

$ npm install --dev
$ make test

You can also use make nyan for something new.