How to determine whether an object is an array in javascript

Javascript method to determine whether an object is an array: 1. Use the isArray method, the code is [if (Array.isArray(cars))]; 2. Use the instanceof operator, the code is [if (cars instanceof Array) 】.

The operating environment of this tutorial: Windows 7 system, JavaScript version 1.8.5, DELL G3 computer.

Javascript method to determine whether an object is an array:

1. Use the isArray method

var cars=new Array(); cars[0]="Saab"; cars[1]="Volvo"; cars[2]="BMW"; // 判断是否支持该方法 if (Array.isArray) { if(Array.isArray(cars)) { document.write("该对象是一个数组。") ; } }

2. Use instanceof operator

var cars=new Array(); cars[0]="Saab"; cars[1]="Volvo"; cars[2]="BMW"; if (cars instanceof Array) { document.write("该对象是一个数组。") ; }

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