PowerShell: String Formatting

當我看到下面的命令的時候，我有點不解，由於裏面出現了佔位符 

Get-WmiObject Win32_Service |ForEach-Object { "{0} ({1}): Path: {2}" `

-f $_.Name, $_.StartMode, $_.PathName }

那佔位符究竟是什麼做用，咱們看下這個示例，佔位符從0開始，而後1...10之類

佔位符的做用：幫變量佔位置，這樣咱們就可讓格式化輸出

When I saw the first drafts of the scripts, they had a lot of Write-Verbose calls like this one:

$VerbosePreference = 「Continue」

$filepath = 「C:ps-testtest.txt」

$owner = 「juneb」

$result = $true

Write-Verbose (「Created {0} by {1}. Result is {2}.」 –f $filepath, $owner, $result)

Here’s the result:

VERBOSE: Created C:ps-testtest.txt by juneb. Result is True.

參考連接：

https://blogs.technet.microsoft.com/heyscriptingguy/2014/02/15/string-formatting-in-windows-powershell/

http://social.technet.microsoft.com/wiki/contents/articles/4250.powershell-string-formatting.aspx