[RUBY] Convert alphabet to 26 base + array length

I will post something that was helpful when solving the paiza problem

Convert alphabet to 26-ary (1-26)

S="abcdefghijklmnopqrstuvwxyz" S.index(x)+1 It is converted to a character string up to the 26th with S, and converted to a number depending on the number of the actual alphabet. (There seems to be a better way ...)

Array length

x = [1,2,3,4,5] x.length (=5) (x.length -1) (=4) You can use it even with a short length.

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