Function left

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