Object.prototype.toString.call(obj) === “[object Object]”
Object.prototype.toString.call(arr)=="[object Array]"
Object.prototype.toString.call(fun) === “[object Function]”
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Object.prototype.toString.call(obj) === “[object Object]”
Object.prototype.toString.call(arr)=="[object Array]"
Object.prototype.toString.call(fun) === “[object Function]”