Class: RuboCop::Cop::Performance::SortReverse

Inherits:
Base
  • Object
show all
Extended by:
AutoCorrector
Includes:
SortBlock
Defined in:
lib/rubocop/cop/performance/sort_reverse.rb

Overview

This cop identifies places where `sort { |a, b| b <=> a }` can be replaced by a faster `sort.reverse`.

Examples:

# bad
array.sort { |a, b| b <=> a }

# good
array.sort.reverse

Constant Summary collapse

MSG = 
'Use `sort.reverse` instead of `%<bad_method>s`.'

Instance Method Summary collapse

Instance Method Details

#on_block(node) ⇒ Object 



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# File 'lib/rubocop/cop/performance/sort_reverse.rb', line 22

def on_block(node)
  sort_with_block?(node) do |send, var_a, var_b, body|
    replaceable_body?(body, var_b, var_a) do
      range = sort_range(send, node)

      add_offense(range, message: message(var_a, var_b)) do |corrector|
        replacement = 'sort.reverse'

        corrector.replace(range, replacement)
      end
    end
  end
end