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choonkending/simple-either-type.js

Created May 28, 2017 11:13
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simple-either-type.js
const Left = x => ({
map: f => Left(x),
fold: (ifLeft, ifRight) => ifLeft(x)
});
const Right = x => ({
map: f => Right(f(x)),
fold: (ifLeft, ifRight) => ifRight(x)
});
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