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ysmood/tmp.js

Created January 17, 2019 09:44
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tmp.js
let inc = n => ++n
let dec = n => --n
function add (x, y) {
if (y < 0) return add(dec(x), inc(y))
if (y === 0) return x
if (y > 0) return add(inc(x), dec(y))
}
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