mirror of https://gitee.com/bigwinds/arangodb
149 lines
2.8 KiB
Ruby
149 lines
2.8 KiB
Ruby
##
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# Hash
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#
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# ISO 15.2.13
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class Hash
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##
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# Delete the element with the key +key+.
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# Return the value of the element if +key+
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# was found. Return nil if nothing was
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# found. If a block is given, call the
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# block with the value of the element.
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#
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# ISO 15.2.13.4.8
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def delete(key, &block)
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if block && ! self.has_key?(key)
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block.call(key)
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else
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self.__delete(key)
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end
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end
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##
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# Calls the given block for each element of +self+
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# and pass the key and value of each element.
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#
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# ISO 15.2.13.4.9
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def each(&block)
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self.keys.each{|k| block.call([k, self[k]])}
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self
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end
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##
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# Calls the given block for each element of +self+
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# and pass the key of each element.
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#
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# ISO 15.2.13.4.10
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def each_key(&block)
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self.keys.each{|k| block.call(k)}
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self
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end
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##
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# Calls the given block for each element of +self+
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# and pass the value of each element.
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#
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# ISO 15.2.13.4.11
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def each_value(&block)
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self.keys.each{|k| block.call(self[k])}
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self
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end
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##
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# Create a direct instance of the class Hash.
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#
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# ISO 15.2.13.4.16
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def initialize(*args, &block)
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self.__init_core(block, *args)
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end
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##
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# Return a hash which contains the content of
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# +self+ and +other+. If a block is given
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# it will be called for each element with
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# a duplicate key. The value of the block
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# will be the final value of this element.
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#
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# ISO 15.2.13.4.22
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def merge(other, &block)
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h = {}
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raise "can't convert argument into Hash" unless other.respond_to?(:to_hash)
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other = other.to_hash
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self.each_key{|k| h[k] = self[k]}
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if block
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other.each_key{|k|
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h[k] = (self.has_key?(k))? block.call(k, self[k], other[k]): other[k]
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}
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else
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other.each_key{|k| h[k] = other[k]}
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end
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h
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end
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# 1.8/1.9 Hash#reject! returns Hash; ISO says nothing.
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def reject!(&b)
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keys = []
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self.each_key{|k|
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v = self[k]
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if b.call(k, v)
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keys.push(k)
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end
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}
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return nil if keys.size == 0
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keys.each{|k|
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self.delete(k)
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}
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self
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end
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# 1.8/1.9 Hash#reject returns Hash; ISO says nothing.
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def reject(&b)
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h = {}
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self.each_key{|k|
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v = self[k]
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unless b.call(k, v)
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h[k] = v
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end
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}
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h
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end
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# 1.9 Hash#select! returns Hash; ISO says nothing.
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def select!(&b)
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keys = []
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self.each_key{|k|
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v = self[k]
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unless b.call(k, v)
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keys.push(k)
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end
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}
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return nil if keys.size == 0
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keys.each{|k|
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self.delete(k)
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}
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self
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end
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# 1.9 Hash#select returns Hash; ISO says nothing.
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def select(&b)
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h = {}
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self.each_key{|k|
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v = self[k]
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if b.call(k, v)
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h[k] = v
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end
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}
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h
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end
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end
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##
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# Hash is enumerable
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#
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# ISO 15.2.13.3
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module Enumerable; end
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class Hash
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include Enumerable
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end
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