Smart Calculator

Smart Calculator for Nodejs without using eval function.

Focus on keeping the native math expression with all type of Polish notations. Full-Supported the JS's Math functions with some extension functions.

Show case

infix

100 = 100
1 + -5 = -4
-1 + 5 = 4
-1 + -5 = -6
abs[-1] + 2 = 3
abs[-1] + 2^3 = 9
-1 - |-3| + 2^5 = 28
-10 - abs(-3) + 2^5 = 18
-1 - abs(-3) + pow[2, 5] = 28
sin(90) + 5 = 5.893996663600558
(PI - 1) * 3 = 6.424777960769379
PI + 1 + 10%3 = 5.141592653589793
5! + 2 = 122

pow(5,|1 - 4|) = 125
max(10, 20 + 5, 30 - 40, min ( 40, 100)) = 40
max(10, 20 + 5, min ( 40, 100) * 4,30 - 40) = 160

9 - 3 : 1/3 + 1 = 1

postfix

1 -5 + = -4
-1 5 + = 4
-1 -5 + = -6
abs[-1] 2 + = 3
abs[-1] 2^3 + = 9
-1 |-3| - 2^5 + = 28
-10 abs(-3) - 2^5 + = 18
-1 abs(-3) - pow[2, 5] + = 28
sin(90) 5 + = 5.893996663600558
PI 1 - 3 * = 6.424777960769379
PI 1 + 10%3 + = 5.141592653589793
5! 2 + = 122

. 5 . 1 3 - abs. pow. = 25
. 10 20 5 + 30 40 - . 40 100 min. max. = 40
. 10 20 5 + . 40 100 min. 4 * 30 40 - max. = 160

9 3 1 3 / : - 1 + = 1

prefix

+ 1 -5 = -4
+ -1 5 = 4
+ -1 -5 = -6
+ abs[-1] 2 = 3
+ abs[-1] 2^3 = 9
+ - -1 |-3| 2^5 = 28
+ - -10 abs(-3) 2^5 = 18
+ - -1 abs(-3) pow[2, 5] = 28
+ sin(90) 5 = 5.893996663600558
* - PI 1 3 = 6.424777960769379
+ + PI 1 10%3 = 5.141592653589793
+ 5! 2 = 122

.pow 5 .abs - 1 4 . . = 125
.max 10 + 20 5 - 30 40 .min 40 100 . . = 40
.max 10 + 20 5 * .min 40 100 . 4 - 30 40 . = 160

+ - 9 : 3 / 1 3 1 = 1

Installation

Global scope: npm install scalc -g

Local scope: npm install scalc --save

Usage

Command Line

Wrap your expression with double quotes or single quotes

scalc "your_expression"

scalc 'your_expression'

or without any quotes

scalc your_expression

E.x: scalc "1 + 5*(PI - 10 * 2^5)" or scalc 1 + 5*[PI - 10 * 2^5]

The result will be copied to the system clipboard, so you can easily paste to anywhere.

API

var scalc = require('scalc')
var result = scalc(your_expression)

Contributing

Feel free to send your PRs!

1. Fork it ٩◔̯◔۶
2. Install dependencies: npm install
3. Test your changes: npm test
4. Commit your changes: git commit -m 'Add some feature'
5. Push to your repo: git push
6. Submit a pull request ♥‿♥

✌(-‿-)✌ You can use git-u for quicker clone: git-u your_name your_repo

License

MIT