Cyclomatic complexity for send is too high. [8/6] Open
def send(request)
return @client.request(request) if request.is_a? RingCentralSdk::Helpers::Request
raise(ArgumentError, 'Request is not a ...Helpers::Request or Hash') unless request.is_a? Hash
verb = request.key?(:verb) ? request[:verb].to_s.downcase : 'get'
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This cop checks that the cyclomatic complexity of methods is not higher than the configured maximum. The cyclomatic complexity is the number of linearly independent paths through a method. The algorithm counts decision points and adds one.
An if statement (or unless or ?:) increases the complexity by one. An else branch does not, since it doesn't add a decision point. The && operator (or keyword and) can be converted to a nested if statement, and ||/or is shorthand for a sequence of ifs, so they also add one. Loops can be said to have an exit condition, so they add one.
Perceived complexity for send is too high. [8/7] Open
def send(request)
return @client.request(request) if request.is_a? RingCentralSdk::Helpers::Request
raise(ArgumentError, 'Request is not a ...Helpers::Request or Hash') unless request.is_a? Hash
verb = request.key?(:verb) ? request[:verb].to_s.downcase : 'get'
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This cop tries to produce a complexity score that's a measure of the
complexity the reader experiences when looking at a method. For that
reason it considers when
nodes as something that doesn't add as much
complexity as an if
or a &&
. Except if it's one of those special
case
/when
constructs where there's no expression after case
. Then
the cop treats it as an if
/elsif
/elsif
... and lets all the when
nodes count. In contrast to the CyclomaticComplexity cop, this cop
considers else
nodes as adding complexity.
Example:
def my_method # 1
if cond # 1
case var # 2 (0.8 + 4 * 0.2, rounded)
when 1 then func_one
when 2 then func_two
when 3 then func_three
when 4..10 then func_other
end
else # 1
do_something until a && b # 2
end # ===
end # 7 complexity points
Method build_url
has a Cognitive Complexity of 10 (exceeds 5 allowed). Consider refactoring. Open
def build_url(path)
path = [path] unless path.is_a? Array
unless path.empty?
path0 = path[0].to_s
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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 send
has a Cognitive Complexity of 9 (exceeds 5 allowed). Consider refactoring. Open
def send(request)
return @client.request(request) if request.is_a? RingCentralSdk::Helpers::Request
raise(ArgumentError, 'Request is not a ...Helpers::Request or Hash') unless request.is_a? Hash
verb = request.key?(:verb) ? request[:verb].to_s.downcase : 'get'
- 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
Avoid too many return
statements within this method. Open
return delete(request) if verb == 'delete'
Useless assignment to variable - req
. Open
req = inflate_request req, opts
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This cop checks for every useless assignment to local variable in every
scope.
The basic idea for this cop was from the warning of ruby -cw
:
assigned but unused variable - foo
Currently this cop has advanced logic that detects unreferenced reassignments and properly handles varied cases such as branch, loop, rescue, ensure, etc.
Example:
# bad
def some_method
some_var = 1
do_something
end
Example:
# good
def some_method
some_var = 1
do_something(some_var)
end
Useless assignment to variable - req
. Open
req = inflate_request req, opts
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- Exclude checks
This cop checks for every useless assignment to local variable in every
scope.
The basic idea for this cop was from the warning of ruby -cw
:
assigned but unused variable - foo
Currently this cop has advanced logic that detects unreferenced reassignments and properly handles varied cases such as branch, loop, rescue, ensure, etc.
Example:
# bad
def some_method
some_var = 1
do_something
end
Example:
# good
def some_method
some_var = 1
do_something(some_var)
end
Favor modifier if
usage when having a single-line body. Another good alternative is the usage of control flow &&
/||
. Open
if opts[:body].is_a?(Hash)
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Checks for if and unless statements that would fit on one line
if written as a modifier if/unless. The maximum line length is
configured in the Metrics/LineLength
cop.
Example:
# bad
if condition
do_stuff(bar)
end
unless qux.empty?
Foo.do_something
end
# good
do_stuff(bar) if condition
Foo.do_something unless qux.empty?