Class: LazyArray

Inherits:
Object show all
Includes:
Enumerable
Defined in:
lib/extlib/lazy_array.rb

Overview

borrowed partially from StrokeDB

Constant Summary collapse

RETURN_SELF =

these methods should return self or nil

[ :<<, :clear, :concat, :collect!, :each, :each_index,
:each_with_index, :freeze, :insert, :map!, :push, :replace,
:reject!, :reverse!, :reverse_each, :sort!, :unshift ]

Instance Method Summary collapse

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method, *args, &block) ⇒ Object (private)

delegate any not-explicitly-handled methods to @array, if possible. this is handy for handling methods mixed-into Array like group_by



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# File 'lib/extlib/lazy_array.rb', line 98

def method_missing(method, *args, &block)
  if @array.respond_to?(method)
    lazy_load
    @array.send(method, *args, &block)
  else
    super
  end
end

Instance Method Details

#clear ⇒ Object 



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# File 'lib/extlib/lazy_array.rb', line 36

def clear
  mark_loaded
  @array.clear
  self
end

#eql?(other) ⇒ Boolean Also known as: ==

Returns:

  • (Boolean) 


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# File 'lib/extlib/lazy_array.rb', line 42

def eql?(other)
  lazy_load
  @array.eql?(other.entries)
end

#load_with(&block) ⇒ Object 



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# File 'lib/extlib/lazy_array.rb', line 49

def load_with(&block)
  @load_with_proc = block
  self
end

#loaded? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/extlib/lazy_array.rb', line 54

def loaded?
  @loaded == true
end

#replace(other) ⇒ Object 



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# File 'lib/extlib/lazy_array.rb', line 30

def replace(other)
  mark_loaded
  @array.replace(other.entries)
  self
end

#respond_to?(method, include_private = false) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/extlib/lazy_array.rb', line 64

def respond_to?(method, include_private = false)
  super || @array.respond_to?(method, include_private)
end

#to_proc ⇒ Object 



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# File 'lib/extlib/lazy_array.rb', line 68

def to_proc
  @load_with_proc
end

#unload ⇒ Object 



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# File 'lib/extlib/lazy_array.rb', line 58

def unload
  clear
  @loaded = false
  self
end