import * as isNumber from 'is-number'
import Calculator from './calculator'
console.log(new Calculator('1 + 3 * 2 ^ 3 - 1').getResult)$ npm start
> tsc && node ./lib/index.js
Calculate:
1 + 3 * 2 ^ 3 - 1
result: 24
postfix: [ '1', '3', '2', '3', '^', '*', '+', '1', '-' ]