Higher-order function that returns a function to check if an argument has a length property with a value not greater than or equal to a specified length.
Param: len
The length to compare against.
Returns
A function that takes an argument and returns true if the argument's length is not greater than or equal to the specified length.
Higher-order function that returns a function to check if an argument has a length property with a value not greater than or equal to a specified length.