智能照明系统APP-本地串口
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LightingSystemApp-serial/.svn/pristine/a1/a1afd14f7f5e012042418f1563d...

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239 B

// `Math.sign` method implementation
// https://tc39.github.io/ecma262/#sec-math.sign
module.exports = Math.sign || function sign(x) {
// eslint-disable-next-line no-self-compare
return (x = +x) == 0 || x != x ? x : x < 0 ? -1 : 1;
};