editor-calc

calculate extension for editor

Usage no npm install needed!

<script type="module">
  import editorCalc from 'https://cdn.skypack.dev/editor-calc';
</script>

README

editor-calc

Extend decimal.js to an editor extension, used in coc-calc and vscode-calc

Build Status

Usage

import { calculate, parse } from 'editor-calc';

const result = calculate('sin(PI/2)');
// result === {
//   skip: 0,
//   result: '1',
// }

const result = calculate('1 + 1 = 2 + 3 = 5 + 5 =');
// result === {
//   skip: 15,
//   result: '10'
// }

parse('sin(PI/2) + --- add(1, 2)').getPrintTree().join('\n');
// BinaryExpr -> sin(PI/2)+---add(1,2) => -2.00000
//   FuncCall -> sin(PI/2) => 1.00000
//     BinaryExpr -> PI/2 => 1.57080
//       ConstantAtomic -> PI => 3.14159
//       Operator -> /
//       DecimalAtomic -> 2 => 2.00000
//   Operator -> +
//   Unary -> ---add(1,2) => -3.00000
//     Operator -> ---
//     FuncCall -> add(1,2) => 3.00000
//       DecimalAtomic -> 1 => 1.00000
//       DecimalAtomic -> 2 => 2.00000

Operators

Precedence is from highest to lowest.

Operator Example
exponentiation ** 4 ** 3 ** 2 equivalent to 4 ** (3 ** 2)
unary + - -2 +2
multiply / divide / remainder * / % 4 % 3 4 * 3
addition / subtraction .2 - .1 .1 + .2

Mathematics Constant

  • E
  • PI

Mathematics Functions

abs, acos, acosh, add, asin,
asinh, atan, atanh, atan2, cbrt
ceil, cos, cosh, div, exp,
floor, hypot, ln, log, log2,
log10, max, min, mod, mul,
pow, random, round, sign, sin,
sinh, sqrt, sub, tan, tanh, trunc

Details: http://mikemcl.github.io/decimal.js/#methods