在JavaScript中如何检测天气类型是Array还是Object?

In JavaScript how to detect weather the type is Array or Object?

我需要知道如何检查变量是数组还是对象

var arr = ['foo', 'bar'];
var obj = {
  0: 'foo',
  1: 'bar'
}

document.write('arr is an: ' + typeof arr + ', obj is an: ' + typeof obj)

// The result is always:
// arr is an: object, obj is an: object

有什么方法可以区分这两种类型?

Array.isArray(arr) 将 return trueArray.isArray(obj) 将 return false.