Class: FrugalTimeout::Storage

Inherits:
Object
  • Object
show all
Defined in:
lib/frugal_timeout/support.rb

Overview

{{{1 Storage Stores values for keys, such as:

  1. ‘set key, val’ will store val.

  2. ‘set key, val2’ will store [val, val2].

  3. ‘delete key, val2’ will lead to storing just val again.

I.e. array is used only when it’s absolutely necessary.

While it’s harder to write code because of this, we do save memory by not instantiating all those arrays.

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Storage

Returns a new instance of Storage.



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# File 'lib/frugal_timeout/support.rb', line 116

def initialize
  @storage = {}
end

Instance Method Details

#delete(key, val = nil) ⇒ Object 



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# File 'lib/frugal_timeout/support.rb', line 120

def delete key, val=nil
  return unless stored = @storage[key]

  if val.nil? || stored == val
  @storage.delete key
  return
  end

  stored.delete val
  @storage[key] = stored.first if stored.size == 1
end

#get(key) ⇒ Object Also known as: [] 



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# File 'lib/frugal_timeout/support.rb', line 132

def get key
  @storage[key]
end

#set(key, val) ⇒ Object 



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# File 'lib/frugal_timeout/support.rb', line 137

def set key, val
  unless stored = @storage[key]
  @storage[key] = val
  return
  end

  if stored.is_a? Array
  stored << val
  else
  @storage[key] = [stored, val]
  end
end