https://github.com/2a5f/l-exp

Just a try / It is an extended version of a prefix expression
https://github.com/2a5f/l-exp

l-expression left left-expression left-notation math polish-notation prefix prefix-expression prefix-notation

Last synced: 9 days ago
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Just a try / It is an extended version of a prefix expression

• Host: GitHub
• URL: https://github.com/2a5f/l-exp
• Owner: 2A5F
• License: mit
• Created: 2018-03-22T11:57:18.000Z (over 6 years ago)
• Default Branch: master
• Last Pushed: 2023-12-15T14:45:13.000Z (11 months ago)
• Last Synced: 2023-12-15T15:56:46.327Z (11 months ago)
• Topics: l-expression, left, left-expression, left-notation, math, polish-notation, prefix, prefix-expression, prefix-notation
• Language: JavaScript
• Homepage: http://static.abits.io/l-exp/
• Size: 8.79 KB
• Stars: 1
• Watchers: 2
• Forks: 0
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

README

        
### It is an extended version of a Prefix Notation(Polish notation)

### 这是一个前缀表达式(波兰表达式)的扩展

## Syntax 语法

> No float support temporarily 暂时不支持浮点数

- Default is Multiplication 默认是乘法

  ```

  1 2 = 1 * 2

  ```

- Can multiple values 可以一次计算多个值

  ```

  +1 2 3 4 5 = 1 + 2 + 3 + 4 + 5

  ```

- `,` The Closure 闭合符  

  ```

  /-2 1,3 = (2 - 1) / 3

  ```

- `;` The Back 返回符  

    Back to two consecutive operators  

    返回到两个连续的操作符处

  ```

  /-2+5 1;3 = (2 - (5 + 1)) / 3

  ↑      ↓

  ←-←-←-←-

  ```

```

**/3+1*9 0;8,2 = ((3 / (1 + (9 * 0))) * 8) * 2

↑↑        ↓ ↓

↑ ↖←-←-←-↙ ↓

↖-←-←-←-←-←↙

```

[Try Online](http://static.abits.io/l-exp/)  

**lexp** ( exp_str : `string` ) => com_res : `number`  

Example:

```javascript

lexp('**/3+1*9 0;8,2')

```









I bet someone already thought of this.  

我感觉肯定早就有人想出这个了