SEND + MORE = MONEY: Difference between revisions
→{{header|Ruby}}: Add Ruby
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SEND = 9567 MORE = 1085 MONEY = 10652
done...
</pre>
=={{header|Ruby}}==
Solving for the string "SEND + 1ORE == 1ONEY" using 'tr' , which translates characters to other characters. The resulting string is brutally evalled.
<syntaxhighlight lang="ruby">str = "SEND + 1ORE == 1ONEY"
digits = [0,2,3,4,5,6,7,8,9] # 1 is absent
uniq_chars = str.delete("^A-Z").chars.uniq.join
res = digits.permutation(uniq_chars.size).detect do |perm|
num_str = str.tr(uniq_chars, perm.join)
next if num_str.match?(/\b0/) #no words can start with 0
eval num_str
end
puts str.tr(uniq_chars, res.join)
</syntaxhighlight>
{{out}}
<pre>9567 + 1085 == 10652
</pre>
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