Similar blocks of code found in 3 locations. Consider refactoring. Open
module Togls
module RuleRepositoryDrivers
# Rule Repository In-Memory Driver
#
# The Rule Repository In-Memory Driver provides the interface to store and
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Duplicated Code
Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:
Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.
When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).
Tuning
This issue has a mass of 36.
We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.
The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.
If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.
See codeclimate-duplication
's documentation for more information about tuning the mass threshold in your .codeclimate.yml
.
Refactorings
- Extract Method
- Extract Class
- Form Template Method
- Introduce Null Object
- Pull Up Method
- Pull Up Field
- Substitute Algorithm
Further Reading
- Don't Repeat Yourself on the C2 Wiki
- Duplicated Code on SourceMaking
- Refactoring: Improving the Design of Existing Code by Martin Fowler. Duplicated Code, p76
Remove unnecessary require
statement. Open
require 'thread'
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- Exclude checks
Checks for unnecessary require
statement.
The following features are unnecessary require
statement because
they are already loaded.
ruby -ve 'p $LOADED_FEATURES.reject { |feature| %r|/| =~ feature }' ruby 2.2.8p477 (2017-09-14 revision 59906) [x86_64-darwin13] ["enumerator.so", "rational.so", "complex.so", "thread.rb"]
This cop targets Ruby 2.2 or higher containing these 4 features.
Example:
# bad
require 'unloaded_feature'
require 'thread'
# good
require 'unloaded_feature'
Avoid using Marshal.load
. Open
Marshal.load(@rules[rule_id])
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- Exclude checks
This cop checks for the use of Marshal class methods which have potential security issues leading to remote code execution when loading from an untrusted source.
Example:
# bad
Marshal.load("{}")
Marshal.restore("{}")
# good
Marshal.dump("{}")
# okish - deep copy hack
Marshal.load(Marshal.dump({}))
Use Hash#key?
instead of Hash#has_key?
. Open
if @rules.has_key?(rule_id)
- Read upRead up
- Exclude checks
This cop (by default) checks for uses of methods Hash#haskey? and
Hash#hasvalue? where it enforces Hash#key? and Hash#value?
It is configurable to enforce the inverse, using verbose
method
names also.
Example: EnforcedStyle: short (default)
# bad Hash#haskey? Hash#hasvalue?
# good Hash#key? Hash#value?
Example: EnforcedStyle: verbose
# bad Hash#key? Hash#value?
# good Hash#haskey? Hash#hasvalue?
Missing magic comment # frozen_string_literal: true
. Open
require 'thread'
- Read upRead up
- Exclude checks
This cop is designed to help upgrade to Ruby 3.0. It will add the
comment # frozen_string_literal: true
to the top of files to
enable frozen string literals. Frozen string literals may be default
in Ruby 3.0. The comment will be added below a shebang and encoding
comment. The frozen string literal comment is only valid in Ruby 2.3+.
Example: EnforcedStyle: when_needed (default)
# The `when_needed` style will add the frozen string literal comment
# to files only when the `TargetRubyVersion` is set to 2.3+.
# bad
module Foo
# ...
end
# good
# frozen_string_literal: true
module Foo
# ...
end
Example: EnforcedStyle: always
# The `always` style will always add the frozen string literal comment
# to a file, regardless of the Ruby version or if `freeze` or `<<` are
# called on a string literal.
# bad
module Bar
# ...
end
# good
# frozen_string_literal: true
module Bar
# ...
end
Example: EnforcedStyle: never
# The `never` will enforce that the frozen string literal comment does
# not exist in a file.
# bad
# frozen_string_literal: true
module Baz
# ...
end
# good
module Baz
# ...
end
Redundant else
-clause. Open
else
- Read upRead up
- Exclude checks
Checks for empty else-clauses, possibly including comments and/or an
explicit nil
depending on the EnforcedStyle.
Example: EnforcedStyle: empty
# warn only on empty else
# bad
if condition
statement
else
end
# good
if condition
statement
else
nil
end
# good
if condition
statement
else
statement
end
# good
if condition
statement
end
Example: EnforcedStyle: nil
# warn on else with nil in it
# bad
if condition
statement
else
nil
end
# good
if condition
statement
else
end
# good
if condition
statement
else
statement
end
# good
if condition
statement
end
Example: EnforcedStyle: both (default)
# warn on empty else and else with nil in it
# bad
if condition
statement
else
nil
end
# bad
if condition
statement
else
end
# good
if condition
statement
else
statement
end
# good
if condition
statement
end