Class: Alf::Engine::Sort

Inherits:
Object
  • Object
show all
Includes:
Cog
Defined in:
lib/alf-engine/alf/engine/sort.rb

Overview

Sort its operand according to an ordering information.

Defined Under Namespace

Classes: InMemory

Instance Attribute Summary collapse

Attributes included from Cog

#expr

Instance Method Summary collapse

Methods included from Cog

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

Constructor Details

#initialize(operand, ordering, expr = nil) ⇒ Sort

Creates an Autonum instance



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# File 'lib/alf-engine/alf/engine/sort.rb', line 16

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

Instance Attribute Details

#operand ⇒ Enumerable (readonly)

Returns The operand.

Returns:

  • (Enumerable) —

    The operand



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

def operand
  @operand
end

#ordering ⇒ Ordering (readonly)

Returns The ordering info.

Returns:

  • (Ordering) —

    The ordering info



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

def ordering
  @ordering
end

Instance Method Details

#_each(&block) ⇒ Object 



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# File 'lib/alf-engine/alf/engine/sort.rb', line 23

def _each(&block)
  Sort::InMemory.new(operand, ordering, expr).each(&block)
end