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如何在Ruby中檢測未使用的參數？是否有任何源代碼分析工具在Ruby中檢測到未使用的參數？
選擇我所知道的包括
- 作爲嚴謹與TDD。
- Heckle（由於ParseTree問題，目前僅適用於Ruby 1.8）
- 使用IDE（如RubyMine）檢測未使用的參數或自動執行重構。
但是，是否有任何源代碼分析工具或警告選項允許您檢測未使用的參數？
背景：我在做一些重構。我從（代碼稍有簡化）改爲：
# Not within the Foo class (therefore can't be as easily accessed by unit testing)
# and in addition, the name of the configuration file is hard-wired
def parse_configuration
raw_configuration = YAML.load_file("configuration.yml")
# Do stuff with raw_configuration to produce configuration_options_for_foo
return configuration_options_for_foo
end
if __FILE__ == $0
configuration_options_for_foo = parse_configuration
foo = Foo.new(configuration_options_for_foo)
end
到
class Foo
# Now unit tests can call Foo.new_using_yaml("configuration.yml")
# or use "test_configuration.yml"
def self.new_using_yaml(yaml_filename)
# Where I went wrong, forgetting to replace "configuration.yml" with yaml_filename
raw_configuration = YAML.load_file("configuration.yml")
# Do stuff with raw_configuration to produce configuration_options_for_foo
new(configuration_options_for_foo)
end
end
if __FILE__ == $0
foo = Foo.new_using_yaml("configuration.yml")
end