Contents

# Long Parameter List

## Introduction

A _Long Parameter List_ occurs when a method has a lot of parameters.

## Example

Given

```Ruby
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](Basic-Smell-Options.md), 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. |

Version data entries

53 entries across 51 versions & 2 rubygems

Version	Path
reek-4.8.2	docs/Long-Parameter-List.md
reek-4.8.1	docs/Long-Parameter-List.md
reek-4.8.0	docs/Long-Parameter-List.md
reek-4.7.3	docs/Long-Parameter-List.md
reek-4.7.2	docs/Long-Parameter-List.md
reek-4.7.1	docs/Long-Parameter-List.md
reek-4.7.0	docs/Long-Parameter-List.md
reek-4.6.2	docs/Long-Parameter-List.md
reek-4.6.1	docs/Long-Parameter-List.md
reek-4.6.0	docs/Long-Parameter-List.md
reek-4.5.6	docs/Long-Parameter-List.md
reek-4.5.5	docs/Long-Parameter-List.md
reek-4.5.4	docs/Long-Parameter-List.md
reek-4.5.3	docs/Long-Parameter-List.md
reek-4.5.2	docs/Long-Parameter-List.md
reek-4.5.1	docs/Long-Parameter-List.md
reek-4.5.0	docs/Long-Parameter-List.md
reek-4.4.2	docs/Long-Parameter-List.md
reek-4.4.1	docs/Long-Parameter-List.md
reek-4.4.0	docs/Long-Parameter-List.md