Long Parameter List

Introduction

A Long Parameter List occurs when a method has a lot of parameters.

Example

Given

class Dummy
  def long_list(foo,bar,baz,fling,flung)
    puts foo,bar,baz,fling,flung
  end
end

Reek would report the following warning:

test.rb -- 1 warning:
  [2]:Dummy#long_list has 5 parameters (LongParameterList)

A common solution to this problem would be the introduction of parameter objects.

Current Support in Reek

Long Parameter List reports any method or block with more than 3 parameters.

Configuration

Reek's Long Parameter List detector supports the Basic Smell Options, plus:

Option	Value	Effect
max_params	integer	The maximum number of parameters allowed in a method or block before a warning is issued. Defaults to 3.