Function data2Arr

data2Arr(sourceData, key): any[]
数组对象转数组值
Parameters
- sourceData: {
  [key: string]: any;
  }[]
  源数据
- key: string
  取值的 key
Returns any[]
Example
```
data2Arr([{a: 1, b: 2}, {a: 3}, {b: 1}], 'a'); /// [1, 3]
```