Style/SymbolProc-20220930233959

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Style/SymbolProc

Safe autocorrect: No
⚠️ The autocorrect a cop can yield false positives by design.

Description

Overview

Use symbols as procs when possible.

If you prefer a style that allows block for method with arguments,
please set true to AllowMethodsWithArguments.
respond_to , and define_method? methods are allowed by default.
These are customizable with AllowedMethods option.

Examples

# bad
something.map { |s| s.upcase }
something.map { _1.upcase }

# good
something.map(&:upcase)

AllowMethodsWithArguments: false (default)

# bad
something.do_something(foo) { |o| o.bar }

# good
something.do_something(foo, &:bar)

AllowMethodsWithArguments: true

# good
something.do_something(foo) { |o| o.bar }

AllowComments: false (default)

# bad
something.do_something do |s| # some comment
  # some comment
  s.upcase # some comment
  # some comment
end

AllowComments: true

# good  - if there are comment in either position
something.do_something do |s| # some comment
  # some comment
  s.upcase # some comment
  # some comment
end

AllowedMethods: [respond_to, define_method] (default)

# good
respond_to { |foo| foo.bar }
define_method(:foo) { |foo| foo.bar }

AllowedPatterns: [] (default)

# bad
something.map { |s| s.upcase }

AllowedPatterns: [/map/] (default)

# good
something.map { |s| s.upcase }

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