Class: Alf::Engine::Concat

Inherits:

Object

• Object
• Alf::Engine::Concat

Includes:

Cog

Defined in:

lib/alf-engine/alf/engine/concat.rb

Overview

Concat tuples from multiple operands.

Instance Attribute Summary

• #operands ⇒ Array readonly

  Operands to concatenate.

Instance Method Summary

• #_each(&block) ⇒ Object
• #initialize(operands) ⇒ Concat constructor

  Creates a Concat instance.

Methods included from Cog

#each, #to_dot, #to_relation

Constructor Details

#initialize(operands) ⇒ Concat

Creates a Concat instance

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

def initialize(operands)
  @operands = operands
end

Instance Attribute Details

#operands ⇒ Array (readonly)

Returns operands to concatenate.

Returns:

• (Array) —

  operands to concatenate

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

def operands
  @operands
end

Instance Method Details

#_each(&block) ⇒ Object

# File 'lib/alf-engine/alf/engine/concat.rb', line 18

def _each(&block)
  operands.each do |op|
    op.each(&block)
  end
end