Showing 509 of 509 total issues
Prefer single-quoted strings when you don't need string interpolation or special symbols. Open
require "bundler/setup"
- Read upRead up
- Exclude checks
Checks if uses of quotes match the configured preference.
Example: EnforcedStyle: single_quotes (default)
# bad
"No special symbols"
"No string interpolation"
"Just text"
# good
'No special symbols'
'No string interpolation'
'Just text'
"Wait! What's #{this}!"
Example: EnforcedStyle: double_quotes
# bad
'Just some text'
'No special chars or interpolation'
# good
"Just some text"
"No special chars or interpolation"
"Every string in #{project} uses double_quotes"
Use empty lines between method definitions. Open
def logger; self.class.logger; end
- Read upRead up
- Exclude checks
This cop checks whether method definitions are separated by one empty line.
NumberOfEmptyLines
can be and integer (e.g. 1 by default) or
an array (e.g. [1, 2]) to specificy a minimum and a maximum of
empty lines.
AllowAdjacentOneLineDefs
can be used to configure is adjacent
one line methods definitions are an offense
Example:
# bad
def a
end
def b
end
Example:
# good
def a
end
def b
end
Unnecessary spacing detected. Open
def hi_c9; -1.99 * 10 ** -6; end
- Read upRead up
- Exclude checks
This cop checks for extra/unnecessary whitespace.
Example:
# good if AllowForAlignment is true
name = "RuboCop"
# Some comment and an empty line
website += "/bbatsov/rubocop" unless cond
puts "rubocop" if debug
# bad for any configuration
set_app("RuboCop")
website = "https://github.com/bbatsov/rubocop"
Surrounding space missing for operator *
. Open
hi = hi_c1 + hi_c2*t + hi_c3*r + hi_c4*t*r + hi_c5*t**2 + hi_c6*r**2 + hi_c7*r*t**2 + hi_c8*t*r**2 + hi_c9*(t*r)**2
- Read upRead up
- Exclude checks
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
Use %q
only for strings that contain both single quotes and double quotes. Open
spec.summary = %q{A thermostat gem}
- Exclude checks
Surrounding space missing for operator *
. Open
hi = hi_c1 + hi_c2*t + hi_c3*r + hi_c4*t*r + hi_c5*t**2 + hi_c6*r**2 + hi_c7*r*t**2 + hi_c8*t*r**2 + hi_c9*(t*r)**2
- Read upRead up
- Exclude checks
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
Surrounding space missing for operator *
. Open
hi = hi_c1 + hi_c2*t + hi_c3*r + hi_c4*t*r + hi_c5*t**2 + hi_c6*r**2 + hi_c7*r*t**2 + hi_c8*t*r**2 + hi_c9*(t*r)**2
- Read upRead up
- Exclude checks
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
Space around operator **
detected. Open
def hi_c7; 1.22874 * 10 ** -3; end
- Read upRead up
- Exclude checks
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
Use empty lines between method definitions. Open
def relative_humidity_percent; @sensor.rh; end
- Read upRead up
- Exclude checks
This cop checks whether method definitions are separated by one empty line.
NumberOfEmptyLines
can be and integer (e.g. 1 by default) or
an array (e.g. [1, 2]) to specificy a minimum and a maximum of
empty lines.
AllowAdjacentOneLineDefs
can be used to configure is adjacent
one line methods definitions are an offense
Example:
# bad
def a
end
def b
end
Example:
# good
def a
end
def b
end
Avoid single-line method definitions. Open
def hi_c4; -0.22475541; end
- Read upRead up
- Exclude checks
This cop checks for single-line method definitions that contain a body. It will accept single-line methods with no body.
Example:
# bad
def some_method; body end
def link_to(url); {:name => url}; end
def @table.columns; super; end
# good
def no_op; end
def self.resource_class=(klass); end
def @table.columns; end
Line is too long. [119/80] Open
controller = Thermostat::Simple::Controller.new cool_relay: Thermostat::HardwareController::RaspberryPi::Relay.new(17),
- Exclude checks
Use module_function
instead of extend self
. Open
extend self
- Read upRead up
- Exclude checks
This cops checks for use of extend self
or module_function
in a
module.
Supported styles are: modulefunction, extendself.
Example: EnforcedStyle: module_function (default)
# bad
module Test
extend self
# ...
end
# good
module Test
module_function
# ...
end
Example: EnforcedStyle: extend_self
# bad
module Test
module_function
# ...
end
# good
module Test
extend self
# ...
end
These offenses are not auto-corrected since there are different implications to each approach.
Missing top-level class documentation comment. Open
class Formatter < ::Logger::Formatter
- Read upRead up
- Exclude checks
This cop checks for missing top-level documentation of classes and modules. Classes with no body are exempt from the check and so are namespace modules - modules that have nothing in their bodies except classes, other modules, or constant definitions.
The documentation requirement is annulled if the class or module has a "#:nodoc:" comment next to it. Likewise, "#:nodoc: all" does the same for all its children.
Example:
# bad
class Person
# ...
end
# good
# Description/Explanation of Person class
class Person
# ...
end
Prefer annotated tokens (like %<foo>s</foo>
) over unannotated tokens (like %s
). Open
"%s [%s.%d] %13s.%-5s %s\n"
- Read upRead up
- Exclude checks
Use a consistent style for named format string tokens.
Note:
unannotated
style cop only works for strings
which are passed as arguments to those methods:
sprintf
, format
, %
.
The reason is that unannotated format is very similar
to encoded URLs or Date/Time formatting strings.
Example: EnforcedStyle: annotated (default)
# bad
format('%{greeting}', greeting: 'Hello')
format('%s', 'Hello')
# good
format('%<greeting>s', greeting: 'Hello')</greeting>
Example: EnforcedStyle: template
# bad
format('%<greeting>s', greeting: 'Hello')
format('%s', 'Hello')
# good
format('%{greeting}', greeting: 'Hello')</greeting>
Example: EnforcedStyle: unannotated
# bad
format('%<greeting>s', greeting: 'Hello')
format('%{greeting}', 'Hello')
# good
format('%s', 'Hello')</greeting>
Use alias
instead of alias_method
in a class body. Open
alias_method :on, :close
- Read upRead up
- Exclude checks
This cop enforces the use of either #alias
or #alias_method
depending on configuration.
It also flags uses of alias :symbol
rather than alias bareword
.
Example: EnforcedStyle: prefer_alias (default)
# bad
alias_method :bar, :foo
alias :bar :foo
# good
alias bar foo
Example: EnforcedStyle: preferaliasmethod
# bad
alias :bar :foo
alias bar foo
# good
alias_method :bar, :foo
Avoid single-line method definitions. Open
def hi_c9; -1.99 * 10 ** -6; end
- Read upRead up
- Exclude checks
This cop checks for single-line method definitions that contain a body. It will accept single-line methods with no body.
Example:
# bad
def some_method; body end
def link_to(url); {:name => url}; end
def @table.columns; super; end
# good
def no_op; end
def self.resource_class=(klass); end
def @table.columns; end
Extra empty line detected at class body end. Open
end
- Read upRead up
- Exclude checks
This cops checks if empty lines around the bodies of classes match the configuration.
Example: EnforcedStyle: empty_lines
# good
class Foo
def bar
# ...
end
end
Example: EnforcedStyle: emptylinesexcept_namespace
# good
class Foo
class Bar
# ...
end
end
Example: EnforcedStyle: emptylinesspecial
# good
class Foo
def bar; end
end
Example: EnforcedStyle: noemptylines (default)
# good
class Foo
def bar
# ...
end
end
Avoid single-line method definitions. Open
def rpi_gpio_loaded?; false; end
- Read upRead up
- Exclude checks
This cop checks for single-line method definitions that contain a body. It will accept single-line methods with no body.
Example:
# bad
def some_method; body end
def link_to(url); {:name => url}; end
def @table.columns; super; end
# good
def no_op; end
def self.resource_class=(klass); end
def @table.columns; end
Do not leave space between !
and its argument. Open
!! @handle and return @handle
- Read upRead up
- Exclude checks
This cop checks for space after !
.
Example:
# bad
! something
# good
!something
Indent access modifiers like private
. Open
private
- Read upRead up
- Exclude checks
Modifiers should be indented as deep as method definitions, or as deep as the class/module keyword, depending on configuration.
Example: EnforcedStyle: indent (default)
# bad
class Plumbus
private
def smooth; end
end
# good
class Plumbus
private
def smooth; end
end
Example: EnforcedStyle: outdent
# bad
class Plumbus
private
def smooth; end
end
# good
class Plumbus
private
def smooth; end
end