Class: OrderedHash

Inherits:
Hash
  • Object
show all
Defined in:
lib/ordered_hash_1.8.rb

Overview

This is a hack from blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/20551 But seriously folks, just for fuck sake upgrade your damn Ruby finally :/ I shall drop 1.8 support at some point, not very soon, but it’s a matter of months, not years, OK?

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ OrderedHash

Returns a new instance of OrderedHash.



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# File 'lib/ordered_hash_1.8.rb', line 10

def initialize
  @keys = []
end

Instance Attribute Details

#keys ⇒ Object (readonly)

Returns the value of attribute keys.



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# File 'lib/ordered_hash_1.8.rb', line 9

def keys
  @keys
end

Instance Method Details

#[]=(key, val) ⇒ Object 



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# File 'lib/ordered_hash_1.8.rb', line 14

def []=(key, val)
  @keys << key
  super
end

#delete(key) ⇒ Object 



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# File 'lib/ordered_hash_1.8.rb', line 19

def delete(key)
  @keys.delete(key)
  super
end

#each ⇒ Object 



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# File 'lib/ordered_hash_1.8.rb', line 24

def each
  @keys.each { |k| yield k, self[k] }
end

#each_key ⇒ Object 



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# File 'lib/ordered_hash_1.8.rb', line 28

def each_key
  @keys.each { |k| yield k }
end

#each_pair ⇒ Object 



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# File 'lib/ordered_hash_1.8.rb', line 7

alias_method :each_pair, :each

#each_value ⇒ Object 



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# File 'lib/ordered_hash_1.8.rb', line 32

def each_value
  @keys.each { |k| yield self[k] }
end

#merge(hash) ⇒ Object 



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# File 'lib/ordered_hash_1.8.rb', line 36

def merge(hash)
  @keys.push(*hash.keys)
  super(hash)
end

#select(&block) ⇒ Object 



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# File 'lib/ordered_hash_1.8.rb', line 41

def select(&block)
  self.inject(self.class.new) do |buffer, pair|
    if block.call(*pair)
      buffer.merge(pair[0] => pair[1])
    end
    buffer
  end
end

#store ⇒ Object 



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# File 'lib/ordered_hash_1.8.rb', line 6

alias_method :store, :[]=