Method symbolize_keys! has a Cognitive Complexity of 6 (exceeds 5 allowed). Consider refactoring. Open
def symbolize_keys!
# we have to use `keys.each` because we can't modify a Hash during `each`
keys.each do |key|
new_key = key.respond_to?(:to_sym) ? key.to_sym : key
val = delete(key)- Read upRead up
Cognitive Complexity
Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.
A method's cognitive complexity is based on a few simple rules:
- Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
- Code is considered more complex for each "break in the linear flow of the code"
- Code is considered more complex when "flow breaking structures are nested"
Further reading
Method symbolize_keys has a Cognitive Complexity of 6 (exceeds 5 allowed). Consider refactoring. Open
def symbolize_keys
result = self.class.new
each do |key, val|
new_key = key.respond_to?(:to_sym) ? key.to_sym : key
new_value = val.respond_to?(:symbolize_keys) ? val.symbolize_keys : val- Read upRead up
Cognitive Complexity
Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.
A method's cognitive complexity is based on a few simple rules:
- Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
- Code is considered more complex for each "break in the linear flow of the code"
- Code is considered more complex when "flow breaking structures are nested"
Further reading
Use each_key instead of keys.each. Open
keys.each do |key|- Read upRead up
- Exclude checks
This cop checks for uses of each_key and each_value Hash methods.
Note: If you have an array of two-element arrays, you can put parentheses around the block arguments to indicate that you're not working with a hash, and suppress RuboCop offenses.
Example:
# bad
hash.keys.each { |k| p k }
hash.values.each { |v| p v }
hash.each { |k, _v| p k }
hash.each { |_k, v| p v }
# good
hash.each_key { |k| p k }
hash.each_value { |v| p v }