@virtuoid/calculator v1.0.1

Fun With JavaScript - 'Calculator' static class

This repository is for the 'Calculator' static class used in the Fun with JavaScript series (https://funwithjavascript.com).

You pass a string equation to the single method, solve(), and the calulator will return the value of that equation.

This code DOES NOT use eavl(), but instead a double-stack system.

Versions

1.0.1 : Hotfix - type=module for package.json 1.0.0 : Initial Version

Installation

npm install --save @virtuoid/calculator

Dependencies

No dependencies

Usage

It is important to note that the Calculator class is a static class. It cannot be instantiated. In fact, it will throw an error if you do!

import Calculator from '@virtuoid/calculator';

// Sample equations
let result;
result = Calculator.solve('3+4');       // result = 7
result = Calculator.solve('3-4');       // result = -1
result = Calculator.solve('2*3+4');     // result = 10 (operator precedence)
result = Calculator.solve('2*(3+4)');   // result = 14 (parenthesis done first)
result = Calculator.solve('2*(3+(4*5)-(6+7))*8+9');
console.log(result);    // output 169 (stacked parenthesis)

Methods

Operands

Any valid integer or floating-point number. Scientific Notation, Infinity, and imaginary numbers are not supported.

Operators

Addition (+), Subtraction (-), Multiplication (*), and Division (/).

Groupings

Parenthesis are supported.

Github

https://github.com/TheVirtuoid/fwjs-calculator