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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