moonleerecords/moonlee-website

This cops checks for code that can be changed to blank?. Settings: NilOrEmpty: Convert checks for nil or empty? to blank? NotPresent: Convert usages of not present? to blank? UnlessPresent: Convert usages of unless present? to blank?

Example:

# NilOrEmpty: true
  # bad
  foo.nil? || foo.empty?
  foo == nil || foo.empty?

  # good
  foo.blank?

# NotPresent: true
  # bad
  !foo.present?

  # good
  foo.blank?

# UnlessPresent: true
  # bad
  something unless foo.present?
  unless foo.present?
    something
  end

  # good
  something if foo.blank?
  if foo.blank?
    something
  end

This cops checks for code that can be changed to blank?. Settings: NilOrEmpty: Convert checks for nil or empty? to blank? NotPresent: Convert usages of not present? to blank? UnlessPresent: Convert usages of unless present? to blank?

Example:

# NilOrEmpty: true
  # bad
  foo.nil? || foo.empty?
  foo == nil || foo.empty?

  # good
  foo.blank?

# NotPresent: true
  # bad
  !foo.present?

  # good
  foo.blank?

# UnlessPresent: true
  # bad
  something unless foo.present?
  unless foo.present?
    something
  end

  # good
  something if foo.blank?
  if foo.blank?
    something
  end

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

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