Function allEmpty

allEmpty(texts?: (undefined | null | string)[]): boolean
Returns whether all the given texts are empty
Parameters
- Optionaltexts: (undefined | null | string)[]
  the texts to check
Returns boolean
whether all the given texts are empty
Author
David Hsing
Example
```
allEmpty([null, undefined]);    // true
allEmpty([null, 'true']);    // false
```