计算数组的长度,如果只包含一个元素,则返回1

Question

$cars = "bmw","audi","volvo","vw"
echo $cars.length

返回4,但是

$cars = "bmw"

返回3因为它计算字符..

如果数组只包含一个项目,有没有办法可以返回1？

Answer 1

其他几个选择:

1. 使用逗号运算符创建数组:

   $cars = ,"bmw"
   $cars.GetType().FullName
   # Outputs: System.Object[]
   

2. 使用数组子表达式语法:

   $cars = @("bmw")
   $cars.GetType().FullName
   # Outputs: System.Object[]
   

如果您不想要对象数组,则可以向下转换为您想要的类型,例如字符串数组.

 [string[]] $cars = ,"bmw"
 [string[]] $cars = @("bmw")

Answer 2

而不是写的echo $cars.length写echo @($cars).length

Answer 3

将数组声明为:

$car = array("bmw")

编辑

现在使用powershell语法:)

$car = [array]"bmw"