如何将哈希表传递给PowerShell中的函数? [英] How do you pass a hash table to a function in PowerShell?

问题描述

将哈希表传递给我的PowerShell函数时，它抱怨说它接收到一个对象.

When passing a hash table to my PowerShell function, it complains that it receives an object.

Function ExtendHash(){
  param(
    [hashtable] $source,
    [hashtable] $extender
  )
  ...
}

呼叫者:

$hash1 = @{One = 1; Two = 2}
$hash2 = @{Two = 22; three = 3}
ExtendHash($hash1, $hash2)

无法将类型为System.Object []的System.Object []值转换为类型为System.Collection.Hashtable

Cannot convert the System.Object[] value of type System.Object[] to type System.Collection.Hashtable

那么我该如何做呢?有建议吗?

So how do I make this work? Suggestions?

我还缺少内置的东西吗?我希望使用与JavaScript用于扩展默认选项(合并和覆盖默认值)相同的模式.

Also, am I missing something built-in? I want the same pattern as what JavaScript uses to extend default options (merge and override default values).

推荐答案

请勿使用括号和逗号.这是PowerShell(例如，参数类似于CMD中命令的参数).也就是说，像这样调用您的函数:

Do not use parenthesis and commas. This is PowerShell (say, arguments are similar to arguments of commands in CMD). That is, call your function like this:

ExtendHash $hash1 $hash2

---

在您的情况下，表达式($hash1,$hash2)是一个包含两个项目的数组，并将此数组(一个参数)传递给函数.这样的呼叫正确失败.

---

In your case expression ($hash1,$hash2) is an array of two items and you pass this array, one argument, to the function. Such a call fails correctly.

如果使用Set-StrictMode -Version 2，则PowerShell会捕获此常见"错误:

If you use Set-StrictMode -Version 2 then this "common" mistake is caught by PowerShell:

函数或命令就像是方法一样被调用.参数 应该用空格隔开.有关参数的信息，请参见 about_Parameters帮助主题.

The function or command was called as if it were a method. Parameters should be separated by spaces. For information about parameters, see the about_Parameters Help topic.

这篇关于如何将哈希表传递给PowerShell中的函数?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！