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cheng470/isReallyNaN.js

Created December 23, 2014 05:41
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由于 NaN 是 JavaScript 中唯一一个不等于其自身的值，因此，你可以随时通过检查一个值是否等于其自身的方式来测试该值是否是 NaN。
Raw
isReallyNaN.js
function isReallyNaN(x) {
return x !== x;
}
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