A tiny calculator for number arithmetics such as +-*/().

Install

* npm

``bash
npm install --save @algorithm.ts/calculate
`

* yarn

`bash
yarn add @algorithm.ts/calculate
`

* deno

`typescript
import calculate from 'https://raw.githubusercontent.com/guanghechen/algorithm.ts/main/packages/calculate/src/index.ts'
`

Usage


`typescript
// Perform integer arithmetics.
import calculate from 'algorithm.ts/calculate'
// or
import { calculate } from 'algorithm.ts/calculate'

// Perform decimal arithmetics.
import { decimalCalculate } from 'algorithm.ts/calculate'

// Perform bigint arithmetics.
import { bigintCalculate } from 'algorithm.ts/calculate'
`

Examples

* integer arithmetics

`typescript
import calculate from '@algorithm.ts/calculate'

calculate('3/2') // => 1
calculate('-2+1') // => -1
calculate('-23 + 25*3/6') // => -1
calculate('(1+(4+5+2)-3)+(6+8)') // => 23
`

* decimal arithmetics

`typescript
import { decimalCalculate as calculate } from '@algorithm.ts/calculate'

calculate('3/2') // => 1.5
calculate('-2+1') // => -1
calculate('-23 + 25*3/6') // => -1
calculate('(1+(4+5+2)-3)+(6+8)') // => 23
`

* bigint arithmetics

`typescript
import { bigintCalculate as calculate } from '@algorithm.ts/calculate'

calculate('22222222222222222222222222222 * 3333333333333333333323232')
// => 74074074074074074073849599999259259259259259259261504n
`

* Illegal inputs

`typescript
import calculate from '@algorithm.ts/calculate'

calculate('-2++1') // => SyntaxError
calculate('-2*/23') // => SyntaxError
calculate('1+(4+5+2))') // => SyntaxError
calculate('1+(4+5+2') // => SyntaxError
`

* A solution of https://leetcode.com/problems/basic-calculator/

`typescript
export { calculate } from '@algorithm.ts/calculate'
`

* A solution of https://leetcode.com/problems/basic-calculator-ii/

`typescript
export { calculate } from '@algorithm.ts/calculate'
``

Related

* [编译原理-语法制导翻译实现计算器][calculate]

[homepage]: https://github.com/guanghechen/algorithm.ts/tree/release-2.x.x/packages/calculate#readme
[calculate]: https://me.guanghechen.com/post/fundamentals-of-compiling/exercise/