patch of the method 'startAt' and 'endAt' when called wihout argument
Correction operator new missing
Remove bad example
- Change args declaration
- Add type annotation
Put correction for the issue#8 in a function
Change push to accept an optional argument as show in the official documentation of push for JS
Cleaning code
Rename function to _removeNulls
Merge pull request #9 from platelk/master

Patch 'endAt' and 'startAt' with no argument