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module Boolean | |
end | |
TrueClass.send :include, Boolean | |
FalseClass.send :include, Boolean | |
true.is_a?(Boolean) #=> true | |
module ArrayExtensions | |
def rpermute( possibilities = self.uniq.count, p_array = [], index = 0 ) | |
0.upto( possibilities - 1 ) do |i| | |
p_array[ index ] = i | |
if index < self.count - 1 # && !self.first.is_a?(Boolean) | |
self.rpermute( possibilities, p_array, index + 1 ) | |
else | |
result = Array.new | |
0.upto( self.count - 1 ) do |j| | |
result[ j ] = self[ p_array[ j ] ] | |
end | |
pp result | |
end | |
end | |
end | |
end | |
module IntegerExtensions | |
def truth_table_array | |
( 0...self ).map{ |i| [ true, false ] }.flatten | |
end | |
end | |
Array.send :include, ArrayExtensions | |
Integer.send :include, IntegerExtensions | |
# no uniq pairs one can just count | |
a = [ 0, 1 ] | |
a.rpermute | |
[0, 0] | |
[0, 1] | |
[1, 0] | |
[1, 1] | |
a = [ 1, 2, 3 ] | |
a.rpermute | |
[1, 1, 1] | |
[1, 1, 2] | |
[1, 1, 3] | |
[1, 2, 1] | |
[1, 2, 2] | |
[1, 2, 3] | |
[1, 3, 1] | |
[1, 3, 2] | |
[1, 3, 3] | |
[2, 1, 1] | |
[2, 1, 2] | |
[2, 1, 3] | |
[2, 2, 1] | |
[2, 2, 2] | |
[2, 2, 3] | |
[2, 3, 1] | |
[2, 3, 2] | |
[2, 3, 3] | |
[3, 1, 1] | |
[3, 1, 2] | |
[3, 1, 3] | |
[3, 2, 1] | |
[3, 2, 2] | |
[3, 2, 3] | |
[3, 3, 1] | |
[3, 3, 2] | |
[3, 3, 3] | |
# only 2 possibilities from all uniq pairs | |
number = 0 | |
number.truth_table_array.rpermute | |
no output | |
number = 2 | |
number.truth_table_array.rpermute | |
[true, true, true, true] | |
[true, true, true, false] | |
[true, true, false, true] | |
[true, true, false, false] | |
[true, false, true, true] | |
[true, false, true, false] | |
[true, false, false, true] | |
[true, false, false, false] | |
[false, true, true, true] | |
[false, true, true, false] | |
[false, true, false, true] | |
[false, true, false, false] | |
[false, false, true, true] | |
[false, false, true, false] | |
[false, false, false, true] | |
[false, false, false, false] | |
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