搜索字符串中的某些单词答案

【问题标题】：search for certian words in a string搜索字符串中的某些单词
【发布时间】：2021-06-22 09:41:08
【问题描述】：

我正在努力编写一个简单的报告脚本。例如

$report.FullFormattedMessage = "This is the deployment test for Servername for Stackoverflow in datacenter onTV"
$report.FullFormattedMessage.GetType()

IsPublic IsSerial Name                                     BaseType                                                                                                        
-------- -------- ----                                     --------                                                                                                        
True     True     String                                   System.Object

现在我想挑出一些特定的词，比如...

$dc = should be the 'onTV'
$srv = should be the 'Servername'
$srv = $report.FullFormattedMessage.contains... or -match ?? something like this?

.split()[] 的技巧对我不起作用，因为 $report 有时看起来不同。我怎么能这样做？

【问题讨论】：

标签： regex powershell output select-string

【解决方案1】：

哦，好的，我找到了解决方案，我不知道这是否是最好的......但我告诉你：

$lines = $report.FullFormattedMessage.split() 

   $dc= ForEach ($line in $lines){
    
    $line | Where-Object {$_ -match "onTV*"} 
    }
    
    $srv= ForEach ($line in $lines){
    
    $line | Where-Object {$_ -match "Server*"} 
    }

【讨论】：

【解决方案2】：

我可能会做类似的事情

$report.FullFormattedMessage = "This is the deployment test for Servername for Stackoverflow in datacenter onTV"
$dc  = if ($report.FullFormattedMessage -match '\b(onTV)\b') { $Matches[1] }        # see details 1
$srv = if ($report.FullFormattedMessage -match '\b(Server[\w]*)') { $Matches[1] }   # see details 2

# $dc   --> "onTV"
# $srv  --> "Servername"

正则表达式详细信息 1

\b             Assert position at a word boundary
(              Match the regular expression below and capture its match into backreference number 1
   onTV        Match the characters “onTV” literally
)             
\b             Assert position at a word boundary

正则表达式细节 2

\b             Assert position at a word boundary
(              Match the regular expression below and capture its match into backreference number 1
   Server      Match the characters “Server” literally
   [\w]        Match a single character that is a “word character” (letters, digits, etc.)
      *        Between zero and unlimited times, as many times as possible, giving back as needed (greedy)
)

【讨论】：