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by bad_user
5317 days ago
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Maybe my example wasn't clear enough. How about if you want to do stuff only with Employees with a salary greater than X? Consider this case ... a_employees = employees.filter{|x| x.salary > A}
b_employees = employees.filter{|x| x.salary > B}
# where A > X, B > X
# so both should work with:
def do_stuff(employees) where employees.salary > X
...
In other words, creating new subclasses is a poor substitute for code contracts, especially since many contracts could be checked at compile time. |
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