Abacus

abacus.js is a light javascript library for node.js built with c code and gyp bindings. It supports arithmetic operations on floting point.

How to install

npm i abacus

or

yarn add abacus

Usage

In all examples below, semicolons and toString calls are not shown. If a commented-out value is in quotes it means toString has been called on the preceding expression.

The library exports a single constructor function, Abacus, which expects a single argument that is a number, string or Abacus instance.

n = new Abacus(15);

n.min(2)		// '13'
n.plus(5)		// '18'
n.gte(20)		// false

If using values with more than a few digits, it is recommended to pass strings rather than numbers to avoid a potential loss of precision.

addition

Abacus(15).plus(5) 	// '20.00000000'

Substraction

Abacus(15).minus(5); 	// '10.00000000'

Multiplication

Abacus(15).multiply(5); // '75.00000000'

Division

Abacus(15).div(5); 	// '3.00000000'

Modulo

Abacus(15).mod(5); 	// '0.00000000'

Power

Abacus(15).pow(5); 	// '759375.00000000'

Floor

Abacus(15.12345).floor(); // '15'

Test

To run the tests using Node.js from the root directory:

npm run test

Each separate test module can also be executed individually, for example:

npm run test ./lib/tests/arithmetic.test.js