Method has too many lines. [26/10] Open
def parse(path, opts = {})
opts = default_opts(opts)
# Read JSON
cont = path
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This cop checks if the length of a method exceeds some maximum value. Comment lines can optionally be ignored. The maximum allowed length is configurable.
Assignment Branch Condition size for parse is too high. [30.23/15] Open
def parse(path, opts = {})
opts = default_opts(opts)
# Read JSON
cont = path
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This cop checks that the ABC size of methods is not higher than the configured maximum. The ABC size is based on assignments, branches (method calls), and conditions. See http://c2.com/cgi/wiki?AbcMetric
Method parse
has a Cognitive Complexity of 19 (exceeds 5 allowed). Consider refactoring. Open
def parse(path, opts = {})
opts = default_opts(opts)
# Read JSON
cont = path
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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
Perceived complexity for parse is too high. [10/7] Open
def parse(path, opts = {})
opts = default_opts(opts)
# Read JSON
cont = path
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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
Cyclomatic complexity for parse is too high. [9/6] Open
def parse(path, opts = {})
opts = default_opts(opts)
# Read JSON
cont = path
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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.
Method parse
has 26 lines of code (exceeds 25 allowed). Consider refactoring. Open
def parse(path, opts = {})
opts = default_opts(opts)
# Read JSON
cont = path
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Space around operator **
detected. Open
cont += fh.read(2 ** 16) until fh.eof?
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Checks that operators have space around them, except for ** which should not have surrounding space.
Example:
# bad
total = 3*4
"apple"+"juice"
my_number = 38/4
a ** b
# good
total = 3 * 4
"apple" + "juice"
my_number = 38 / 4
a**b
Do not suppress exceptions. Open
rescue LoadError
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This cop checks for rescue blocks with no body.
Example:
# bad
def some_method
do_something
rescue
# do nothing
end
Example:
# bad
begin
do_something
rescue
# do nothing
end
Example:
# good
def some_method
do_something
rescue
handle_exception
end
Example:
# good
begin
do_something
rescue
handle_exception
end
Do not use parentheses for method calls with no arguments. Open
Oj.mimic_JSON()
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This cop checks for unwanted parentheses in parameterless method calls.
Example:
# bad
object.some_method()
# good
object.some_method
Use &&
instead of and
. Open
if opts[:additions] and opts[:symbolize]
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This cop checks for uses of and
and or
, and suggests using &&
and
|| instead
. It can be configured to check only in conditions, or in
all contexts.
Example: EnforcedStyle: always (default)
# bad
foo.save and return
# bad
if foo and bar
end
# good
foo.save && return
# good
if foo && bar
end
Example: EnforcedStyle: conditionals
# bad
if foo and bar
end
# good
foo.save && return
# good
foo.save and return
# good
if foo && bar
end