PowerShell，如何增加变量名? [英] PowerShell, how do I increment variable names?
问题描述
我目前正在编写一个解析 XML 文件的 PowerShell 脚本，并将一些解析的值保存为变量以备后用.
I am currently writing a PowerShell script that parses an XML file, and it saves some parsed values as variables for use later.
例如，假设我的 XML 如下所示，
For example, say my XML looks like this,
<head>
<foo>
<bar id="1" status="dead">
<baz>
<qux>Hello World 001</qux>
</baz>
</bar>
<bar>
<baz>
<qux>Hello World 002</qux>
</baz>
</bar>
</foo>
<foo>
<bar id="2" status="dead">
<baz>
<qux>Goodbye World 001</qux>
</baz>
</bar>
<bar>
<baz>
<qux>Goodbye World 002</qux>
</baz>
</bar>
</foo>
</head>
目前，我的脚本是这样的，
Currently, my script looks like this,
[xml]$report = Get-Content ./helloworld.xml
$foo_sub_length = $report.head.foo.length - 1
$bar_sub_length = $report.head.foo[$foo_sub_length].bar.length - 1
$foo_looper = 0
$bar_looper = 0
截至目前，这部分有效，但是，因为我想从每个单独的 foo 中提取 id 号或 qux 字符串，我想做类似于以下的操作(伪代码):
As of right now, this part works, however, because I would like to pull the id number, or the qux string from each individual foo, I would like to do something similar to the following (pseudocode):
do {
do {
$foo($foo_looper)_id = $report.head.foo[$foo_looper].bar[$bar_looper].baz.id
$foo($foo_looper)_bar($bar_looper)_qux = $report.head.foo[$foo_looper].bar[$bar_looper].baz.qux
$bar_looper = $bar_looper + 1
while $bar_looper <= $bar_sub_length
}
$foo_looper = $foo_looper + 1
while $foo_looper <= $foo_sub_length
}
我意识到这可能没有任何意义，或者我可能不清楚，但我需要一些帮助.本质上，有没有办法增加一个变量，使它的名称可以是，例如，$foo1、$foo2、$foo3 等，而不改变它的值?本质上，
I realize this may not have made any sense, or that I may not have been clear, but I would like some assistance. Essentially, is there a way to increment a variable so that it's name could be, for example, $foo1, $foo2, $foo3, etc, without changing it's value? Essentially,
> $bar = 1
> $foo($bar) = hello
> $bar + 1
> $foo($bar) = world
> $foo(1)
hello
> $foo(2)
world
推荐答案
使用 新变量 cmdlet.
Use the New-Variable cmdlet.
例如
$bar = 1
New-Variable "foo$bar" "Hello,"
$bar = $bar + 1
New-Variable "foo$bar" "World!"
"$foo1 $foo2"
应该给你
Hello, World!
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