calculator-lib
Advanced tools
Provides functions for evaluating infix (and RPN postfix) expressions, in JavaScript.
Source is in ES6, released as ES5. Transpiled using Babel.
npm install calculator-lib
const calculator = require('calculator-lib');
calculator('4 + 5'); // -> 9
calculator('2+3/(5^-1)*-1.5'); // -> -20.5
Currently, operations are limited to the following:
*)/)+)-)^)Feel free to add more in a pull request! For example, trigonometric operations would come in handy...
const evaluatePostfix = require('calculator-lib/dist/evaluate-postfix');
evaluatePostfix('1 2 + 3 +'); // -> 6
evaluatePostfix('21 -3.2 *'); // -> -67.2
const infixToPostfix = require('calculator-lib/dist/infix-to-postfix');
infixToPostfix('21 ^ 3 * 2 - 10'); // -> '21 3 ^ 2 * 10 -'
FAQs
Calculate infix / postfix expressions
The npm package calculator-lib receives a total of 5 weekly downloads. As such, calculator-lib popularity was classified as not popular.
We found that calculator-lib demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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