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12 lines
226 B

'use strict';
var pow = Math.pow;
module.exports = function (x) {
if (isNaN(x)) return NaN;
x = Number(x);
if (x === 0) return x;
if (!isFinite(x)) return x;
if (x < 0) return -pow(-x, 1 / 3);
return pow(x, 1 / 3);
};