why don`t judge the length of the second parameters

[ddddderek]

When the length of the second parameters is greater than the length of the array，The undefined will be included in the result.

example:

 var last = require('array-last');

 var a = last(['a', 'b', 'c', 'd', 'e', 'f'],7);

result

[ undefined, 'a', 'b', 'c', 'd', 'e', 'f' ]

[ddddderek]

suggest that the length of the first parameters as a loop condition or when the length of the second parameters is greater than the length of the array will return the array self

[jonschlinkert]

want to do a pr?

[ddddderek]

I'm afraid I can't do it well