Class: Alf::Engine::Compact

Inherits:

Object

• Object
• Alf::Engine::Compact

Includes:

Cog

Defined in:

lib/alf-engine/alf/engine/compact.rb

Overview

Remove duplicate tuples from its operand.

Defined Under Namespace

Classes: Set, Uniq

Instance Attribute Summary

• #operand ⇒ Enumerable readonly

  The operand.

Attributes included from Cog

#expr

Instance Method Summary

• #_each(&block) ⇒ Object
• #initialize(operand, expr = nil) ⇒ Compact constructor

  Creates a Compact instance.

Methods included from Cog

#each, #heading, #keys, #to_cog, #to_dot, #to_relation

Constructor Details

#initialize(operand, expr = nil) ⇒ Compact

Creates a Compact instance

# File 'lib/alf-engine/alf/engine/compact.rb', line 13

def initialize(operand, expr = nil)
  super(expr)
  @operand = operand
end

Instance Attribute Details

#operand ⇒ Enumerable (readonly)

Returns The operand.

Returns:

• (Enumerable) —

  The operand

# File 'lib/alf-engine/alf/engine/compact.rb', line 10

def operand
  @operand
end

Instance Method Details

#_each(&block) ⇒ Object

# File 'lib/alf-engine/alf/engine/compact.rb', line 19

def _each(&block)
  Compact::Uniq.new(operand, expr).each(&block)
end