Class: RuboCop::Cop::Performance::MethodObjectAsBlock

Inherits:
Base
  • Object
show all
Defined in:
lib/rubocop/cop/performance/method_object_as_block.rb

Overview

Identifies places where methods are converted to blocks, with the use of ‘&method`, and passed as arguments to method calls. It is faster to replace those with explicit blocks, calling those methods inside.

Examples:

# bad
array.map(&method(:do_something))
[1, 2, 3].each(&out.method(:puts))

# good
array.map { |x| do_something(x) }
[1, 2, 3].each { |x| out.puts(x) }

Constant Summary collapse

MSG = 
'Use block explicitly instead of block-passing a method object.'

Instance Method Summary collapse

Instance Method Details

#on_block_pass(node) ⇒ Object 



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# File 'lib/rubocop/cop/performance/method_object_as_block.rb', line 26

def on_block_pass(node)
  add_offense(node) if method_object_as_argument?(node)
end