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FredrikAugust/isbn-check-digit-golf.js

Created July 23, 2018 13:53
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Golfed validator of check digit in ISBN (67 characters)
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isbn-check-digit-golf.js
v=i=>(!(eval(i.split('').map((e,i)=>(e*[1,3][i%2])).join('+'))%10))
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