Function 更改PowerShell中foreach函数中的变量名
我有一个脚本,其中一部分需要运行三次不同的时间,因此我想我应该尝试扩展我有限的PowerShell知识,通过使用函数调用相同的代码,而不是一次又一次地复制和粘贴,并制作一个比所需更长的脚本 我希望在函数中重复使用的代码:Function 更改PowerShell中foreach函数中的变量名,function,powershell,foreach,Function,Powershell,Foreach,我有一个脚本,其中一部分需要运行三次不同的时间,因此我想我应该尝试扩展我有限的PowerShell知识,通过使用函数调用相同的代码,而不是一次又一次地复制和粘贴,并制作一个比所需更长的脚本 我希望在函数中重复使用的代码: $users = Get-Content users.txt foreach ($user in $users){ # Get some information from Exchange about the user $dn = (Get-MailboxSta
$users = Get-Content users.txt
foreach ($user in $users){
# Get some information from Exchange about the user
$dn = (Get-MailboxStatistics -id $user).displayname
$ic = (Get-MailboxStatistics -id $user).itemcount
# Make a hash table where user=itemcount
$firstrun += @{"$dn"="$ic"} # Each time the script runs, we
# need a different hash table
# Kick off some Exchange maintenance on the user. (Removed
# to keep the post shorter)
# Item count should lower after a few seconds.
}
当代码重复第二次和第三次时,我希望创建一个新的哈希表(“secondrun”和“thirdrun”)。我的第一个问题是每次更改函数中哈希表名称的名称-可以这样做吗
我也开始怀疑哈希表是否是适合这份工作的工具,或者是否有更好的工具?关于更多的背景,在我有了第二个哈希表之后,我想做一个比较:
foreach ($user in $users){
$c1 = $firstrun.get_item($user)
$c2 = $secondrun.get_item($user)
# If the item count hasn't substantially dropped
if ($c2 -ge $c1){
# Do some different Exchange tasks on the user (removed
# to keep the post shorter)
}
}
最后是第三次运行,它将创建第三个哈希表(同样,user=itemcount)。然后,我将使用每个哈希表中的值向文本文件输出某种报告
我想在这个阶段我有两个主要的问题——函数中哈希表的变量名不断变化,而且在函数运行后维护哈希表也有困难——试图像全局变量一样声明它们似乎不起作用。我对如何更好地解决这些问题持开放态度。如果我是你,我会怎么做?我假设哈希表的名称是什么并不重要。如果是这样的话,您可以抓取当前日期时间并用它来命名您的哈希表,如
$HashTblName = "HashTbl_$($(get-date).ToString("yyyyMMddhhmmssff"))"
如果我明白你的意思,你就在做以下事情:
function Get-UsersItemCount
{
$ht = @{}
$users = Get-Content users.txt
foreach ($user in $users){
# Get some information from Exchange about the user
$dn = (Get-MailboxStatistics -id $user).displayname
$ic = (Get-MailboxStatistics -id $user).itemcount
# Make a hash table where user=itemcount
$ht += @{"$dn"="$ic"}
}
$ht # Returns the hashtable
}
现在可以调用此函数三次:
$firstrun = Get-UsersItemCount
# Do first run stuff
$secondrun = Get-UsersItemCount
# Do second run stuff
$thirdrun = Get-UsersItemCount
# Generate your report
您可以只使用一个哈希表,使值成为一个数组,每个过程有一个元素:
$ht = @{}
$users = Get-Content users.txt
foreach ($user in $users){
# Get some information from Exchange about the user
$stats = Get-MailboxStatistics $user |
select -expand itemcount
$ht[user] += @($stats)}
}
# Kick off some Exchange maintenance on the user. (Removed to
# keep post shorter)
# Item count should lower after a few seconds.
foreach ($user in $users){
# Get some information from Exchange about the user
$stats = Get-MailboxStatistics $user |
select -expand itemcount
$ht[user] += @($stats)
# If the item count hasn't substantially dropped
if ($ht[$user][1] -ge $ht[$user][0])
# Do some different Exchange tasks on the user (removed
# to keep the post shorter)
}
有趣-这看起来也是有效的选择。我还刚刚从您那里学到了比较数组中元素的方法-谢谢!