Rules to write method

Rules
1. It should not both return a value or perform some side-effect. It should only do one.
Eg:
Your method should not do this

def do_multiple(array)
array << "another_element"
end

The method return a modified array , at the same time, mutates the original array.

2. It should very limited things at a time. It should do one thing at a time.

3. If it mutates a value, use "!"

4. If it print something , use keywords like "say_xxx" or "print_xxx"

5. A good program is built with many small methods.

Comments

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