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zhengjia/array_comparison.rb

Created June 1, 2010 20:12
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array include
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array_comparison.rb
#You can just use a set difference (aka minus) to see if one array includes all elements of another
not_included = [1,2,3] - (1..9).to_a
not_included # => []
not_included = [1,2,3,'A'] - (1..9).to_a
not_included # => ["A"]
#Use intersection to test if any of the one are in the other:
shared = [1,2,3,'A'] & (1..9).to_a
shared # => [1, 2, 3]
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