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add language identifier to highlight code
```python
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lang-js
typeof [] === 'object'-->true. That's what you need this method.Object.prototype.toString.call(3)->"[object Number]".Object.prototype.toString.call(new Number(3))->"[object Number]"getType=function(obj){return Object.prototype.toString.call(obj).match(/\[object (\w+)\]/)[1];};