ruby binary operators for arrays
Posted: Sun Jun 29, 2014 1:31 pm
What are the ruby binary operators for arrays?
Like OR:
1
0
1
0
with
1
1
0
0
gives
1
1
1
0
Like OR:
1
0
1
0
with
1
1
0
0
gives
1
1
1
0
Good question - that works a little bit strangely in Ruby because it doesn't represent true and false the same way that 'green' does.
In 'green', zero = false, any other number = true.
In Ruby, 'nil' or 'false' = false, anything else = true (i.e. the number zero is also a 'true' value)
For what you want to do, though, using ones and zeros in an Integer Array is probably the best way - but you will have to be sure to use the 'bitwise' operators ('|' for OR, '&' for AND - single character) rather than the usual boolean ones ('||' for OR, '&&' for AND - two characters).
To do what you want, you'll need to use the 'zipping' technique, similar so your previous number and String code - something like this...
Code: Select all
output 0, @array1.zip(@array2).map{|a, b| a | b} # OR version
output 0, @array1.zip(@array2).map{|a, b| a & b} # AND version
output 0, @array1.zip(@array2).map{|a, b| a ^ b} # XOR versionNote that when using Integers this way, you won't be able to use the NOT operator ('!') - you'll need to use "(1 - x)" to turn ones into zeros and vice-versa.
