Method get_loader has a Cognitive Complexity of 6 (exceeds 5 allowed). Consider refactoring. Open
def self.get_loader(file_name)
raise DataShift::BadFile, "Cannot load #{file_name} file not found." unless File.exist?(file_name)
ext = File.extname(file_name)- 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 ext.casecmp('.xls').zero? instead of ext.casecmp('.xls') == 0. Open
if ext.casecmp('.xls') == 0 || ext.casecmp('.xlsx') == 0- Read upRead up
- Exclude checks
This cop checks for usage of comparison operators (==,
>, <) to test numbers as zero, positive, or negative.
These can be replaced by their respective predicate methods.
The cop can also be configured to do the reverse.
The cop disregards #nonzero? as it its value is truthy or falsey,
but not true and false, and thus not always interchangeable with
!= 0.
The cop ignores comparisons to global variables, since they are often
populated with objects which can be compared with integers, but are
not themselves Interger polymorphic.
Example: EnforcedStyle: predicate (default)
# bad
foo == 0
0 > foo
bar.baz > 0
# good
foo.zero?
foo.negative?
bar.baz.positive?Example: EnforcedStyle: comparison
# bad
foo.zero?
foo.negative?
bar.baz.positive?
# good
foo == 0
0 > foo
bar.baz > 0Use ext.casecmp('.xlsx').zero? instead of ext.casecmp('.xlsx') == 0. Open
if ext.casecmp('.xls') == 0 || ext.casecmp('.xlsx') == 0- Read upRead up
- Exclude checks
This cop checks for usage of comparison operators (==,
>, <) to test numbers as zero, positive, or negative.
These can be replaced by their respective predicate methods.
The cop can also be configured to do the reverse.
The cop disregards #nonzero? as it its value is truthy or falsey,
but not true and false, and thus not always interchangeable with
!= 0.
The cop ignores comparisons to global variables, since they are often
populated with objects which can be compared with integers, but are
not themselves Interger polymorphic.
Example: EnforcedStyle: predicate (default)
# bad
foo == 0
0 > foo
bar.baz > 0
# good
foo.zero?
foo.negative?
bar.baz.positive?Example: EnforcedStyle: comparison
# bad
foo.zero?
foo.negative?
bar.baz.positive?
# good
foo == 0
0 > foo
bar.baz > 0Use a guard clause instead of wrapping the code inside a conditional expression. Open
if ext.casecmp('.xls') == 0 || ext.casecmp('.xlsx') == 0- Read upRead up
- Exclude checks
Use a guard clause instead of wrapping the code inside a conditional expression
Example:
# bad
def test
if something
work
end
end
# good
def test
return unless something
work
end
# also good
def test
work if something
end
# bad
if something
raise 'exception'
else
ok
end
# good
raise 'exception' if something
okUse ext.casecmp('.csv').zero? instead of ext.casecmp('.csv') == 0. Open
elsif ext.casecmp('.csv') == 0- Read upRead up
- Exclude checks
This cop checks for usage of comparison operators (==,
>, <) to test numbers as zero, positive, or negative.
These can be replaced by their respective predicate methods.
The cop can also be configured to do the reverse.
The cop disregards #nonzero? as it its value is truthy or falsey,
but not true and false, and thus not always interchangeable with
!= 0.
The cop ignores comparisons to global variables, since they are often
populated with objects which can be compared with integers, but are
not themselves Interger polymorphic.
Example: EnforcedStyle: predicate (default)
# bad
foo == 0
0 > foo
bar.baz > 0
# good
foo.zero?
foo.negative?
bar.baz.positive?Example: EnforcedStyle: comparison
# bad
foo.zero?
foo.negative?
bar.baz.positive?
# good
foo == 0
0 > foo
bar.baz > 0