Function firstNotNil

firstNotNil(array?): any
Returns the first not nil element in the given array, or null if all elements are nil
Parameters
- Optionalarray: null | any[] | readonly any[]
  the array to check
Returns any
the first not nil element in the given array, or null if all elements are nil
Example
```
firstNotNil([null, undefined, 'foo', 'bar', {}]);    // 'foo'
```