Three ways to determine if an object is not an array

1. Using the instanceof operator

2, Array.isarray () (ES5 new method)

3. Use the native ToString () method on Object.prototype to determine.

How to use:

Object.prototype.toString.call (value)

  varA={}; varb=[]; varFrame=document.createelement ("iframe");//Create a FrameDocument.body.appendChild (frame); varC=window.frames[0]. Array;//gets the array constructor in the framework global execution Environment  varD=NewC ();//Create an array d in the framework Global execution EnvironmentConsole.log (Object.prototype.toString.call (a));//[Object Object]Console.log (Object.prototype.toString.call (b));//[Object Array]Console.log (Object.prototype.toString.call (d));//[Object Array]    functionPerson () { This. name=name; }  varn=NewPerson (); Console.log (Object.prototype.toString.call (n));//[Object Object]

The method cannot detect the function name of a non-native constructor, so any constructor defined will return [object Object].

Three ways to determine if an object is not an array