Bug #6473 ยป enum_count.patch
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* enum.count(item) -> int
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* enum.count { |obj| block } -> int
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*
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* Returns the number of items in <i>enum</i> if it responds to a #size call,
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* otherwise the items are counted through enumeration. If an argument is
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* given the number of items in <i>enum</i> that are equal to <i>item</i> are
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* counted. If a block is given, it counts the number of elements yielding a
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* true value.
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* Returns the number of items in <i>enum</i> through enumeration.
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* If an argument is given the number of items in <i>enum</i> that
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* are equal to <i>item</i> are counted. If a block is given, it
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* counts the number of elements yielding a true value.
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*
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* ary = [1, 2, 4, 2]
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* ary.count #=> 4
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