# react_ts_test

**Repository Path**: crazychad/react_ts_test

## Basic Information

- **Project Name**: react_ts_test
- **Description**: 试试，一个熟悉代码风格的开始
- **Primary Language**: Unknown
- **License**: Not specified
- **Default Branch**: main
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2023-04-27
- **Last Updated**: 2023-04-27

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# 熟悉风格

## js 的 map

1 写一个函数把[1, 2, 3] 变成 {key1: 1, key2: 2, key3: 3}

2 看看下面的代码， 猜想下这段代码干了什么

```
    const rolePermissionMap = {"role1": ["permission1", "permission2"], "role2": ["permission2", "permission3"]}
        Array.from(
          new Set(
            userInfo?.roleIds?.flatMap((roleId) => {
              return rolePermissionMap?.[roleId] ?? [];
            })
          )
        ) ?? [];
```

3 redux