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[DOC] Doc for #& #60

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[DOC] Doc for #& #60

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13 changes: 9 additions & 4 deletions lib/set.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -638,11 +638,16 @@ def -(enum)
end
alias difference -

# Returns a new set containing elements common to the set and the
# given enumerable object.
# :call-seq:
# self & object -> new_set
#
# Returns a new set containing elements found both in +self+
# and in +object+, which must be an array:
#
# s = [0, 'a', :foo, 1, 'b', :bar]
# s & [0, 'b', 1, :bar] # => [0, 1, "b", :bar]
# s & [2, 'c'] # => []
#
# Set[1, 3, 5] & Set[3, 2, 1] #=> #<Set: {3, 1}>
# Set['a', 'b', 'z'] & ['a', 'b', 'c'] #=> #<Set: {"a", "b"}>
def &(enum)
n = self.class.new
if enum.is_a?(Set)
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