Function getTypeof

getTypeof(array?: null | any[] | readonly any[]): undefined | string[]
Returns the element types of the given array
Parameters
- Optionalarray: null | any[] | readonly any[]
  the array to check
Returns undefined | string[]
the element types of the given array
Author
David Hsing
Example
```
getTypeof(['foo', 'bar']);    // ['string', 'string']
```