Function left

left(text?: null | string, length?: number): undefined | null | string
Returns the leftmost length characters of the given string
Parameters
- Optionaltext: null | string
  The text to inspect
- Optionallength: number
  The expected length
Returns undefined | null | string
the leftmost length characters of the given string
Author
David Hsing
Example
```
left('foobar', 3);    // 'foo'
left('foobar', 10);    // 'foobar'
```