计算数组的长度，如果只包含一个元素则返回1 [英] Count length of array and return 1 if it only contains one element

问题描述

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

返回 4，但是

$cars = "bmw"

返回 3 因为它计算字符数..

returns 3 because it counts the characters..

如果数组只包含一个项目，有没有办法返回 1?

Is there a way I can return 1 if the array only contains one item?

推荐答案

其他几个选项:

1. 使用逗号运算符创建数组:

1. Use the comma operator to create an array:

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

使用数组子表达式语法:

Use array subexpression syntax:

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

如果你不想要一个对象数组，你可以向下转换为你想要的类型，例如一个字符串数组.

If you don't want an object array you can downcast to the type you want e.g. a string array.

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

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