タイトルのとおりで初歩的な話ながら、知らなかったのでメモ。
def add_one(num = 10)
num + 1
end
p add_one(3) # => 4
p add_one # => 11
p add_one(nil) # => undefined method `+' for nil:NilClass (NoMethodError)
More than 5 years have passed since last update.
Register as a new user and use Qiita more conveniently
- You get articles that match your needs
- You can efficiently read back useful information
- You can use dark theme