Class: RuboCop::Cop::Style::RedundantEach

Inherits:
Base
  • Object
show all
Extended by:
AutoCorrector
Defined in:
lib/rubocop/cop/style/redundant_each.rb

Overview

Checks for redundant each.

Examples:


# bad
array.each.each { |v| do_something(v) }

# good
array.each { |v| do_something(v) }

# bad
array.each.each_with_index { |v, i| do_something(v, i) }

# good
array.each.with_index { |v, i| do_something(v, i) }
array.each_with_index { |v, i| do_something(v, i) }

# bad
array.each.each_with_object { |v, o| do_something(v, o) }

# good
array.each.with_object { |v, o| do_something(v, o) }
array.each_with_object { |v, o| do_something(v, o) }

Cop Safety Information:

  • This cop is unsafe, as it can produce false positives if the receiver is not an Enumerator.

Constant Summary collapse

MSG = 
'Remove redundant `each`.'
MSG_WITH_INDEX = 
'Use `with_index` to remove redundant `each`.'
MSG_WITH_OBJECT = 
'Use `with_object` to remove redundant `each`.'
RESTRICT_ON_SEND = 
%i[each each_with_index each_with_object].freeze

Instance Attribute Summary

Attributes inherited from Base

#config, #processed_source

Instance Method Summary collapse

Methods included from AutoCorrector

support_autocorrect?

Methods inherited from Base

#active_support_extensions_enabled?, #add_global_offense, #add_offense, autocorrect_incompatible_with, badge, #begin_investigation, callbacks_needed, #callbacks_needed, #config_to_allow_offenses, #config_to_allow_offenses=, #cop_config, cop_name, #cop_name, department, documentation_url, exclude_from_registry, #excluded_file?, #external_dependency_checksum, inherited, #initialize, #inspect, joining_forces, lint?, match?, #offenses, #on_investigation_end, #on_new_investigation, #on_other_file, #parse, #ready, #relevant_file?, support_autocorrect?, support_multiple_source?, #target_rails_version, #target_ruby_version

Methods included from ExcludeLimit

#exclude_limit

Methods included from AutocorrectLogic

#autocorrect?, #autocorrect_enabled?, #autocorrect_requested?, #autocorrect_with_disable_uncorrectable?, #correctable?, #disable_uncorrectable?, #safe_autocorrect?

Methods included from IgnoredNode

#ignore_node, #ignored_node?, #part_of_ignored_node?

Methods included from Util

silence_warnings

Constructor Details

This class inherits a constructor from RuboCop::Cop::Base

Instance Method Details

#on_send(node) ⇒ Object 



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# File 'lib/rubocop/cop/style/redundant_each.rb', line 43

def on_send(node)
  return unless (redundant_node = redundant_each_method(node))

  range = range(node)

  add_offense(range, message: message(node)) do |corrector|
    case node.method_name
    when :each
      remove_redundant_each(corrector, range, redundant_node)
    when :each_with_index
      corrector.replace(node.loc.selector, 'with_index')
    when :each_with_object
      corrector.replace(node.loc.selector, 'with_object')
    end
  end
end