Module: Measurable::Hamming
 Included in:
 Measurable
 Defined in:
 lib/measurable/hamming.rb
Instance Method Summary collapse

#hamming(s1, s2) ⇒ Object
callseq: hamming(s1, s2) > Integer.
Instance Method Details
#hamming(s1, s2) ⇒ Object
callseq:
hamming(s1, s2) > Integer
Count the number of different characters between strings s1
and s2
, that is, how many substitutions are necessary to
change s1
into s2
and viceversa.
See: en.wikipedia.org/wiki/Hamming_distance
Arguments:

s1
> A String. 
s2
> A String with the same size ofs1
.
Returns:

The number of characters in which
s1
ands2
differ.
Raises:

ArgumentError
> The sizes ofs1
ands2
don't match.
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# File 'lib/measurable/hamming.rb', line 20 def hamming(s1, s2) # TODO: Change this to a more specific, custommade exception. raise ArgumentError if s1.size != s2.size s1.chars.zip(s2.chars).reduce(0) do acc, c acc += 1 if c[0] != c[1] acc end end 