Object.prototype.toString.apply([1,2])    //"[object Array]"Object.prototype.toString.apply('str')    //"[object String]"Object.prototype.toString.apply(1)        //"[object Number]"Object.prototype.toString.apply(null)     //"[object Null]"Object.prototype.toString.apply()         //"[object Undefined]"Object.prototype.toString.apply(function(){})      //"[object Function]"Object.prototype.toString.apply(true)     //"[object Boolean]"Object.prototype.toString.apply(new Object())     //"[object Object]"