问题
I have a string simliar to:
c:/folder name/somewhere/application.exe instanceName
(n.b. the space in "folder name" is intentional) I need a way to split this into:
[0]c:/folder name/somewhere/application.exe
[1]instanceName
I was going to use split-path, but apparently there is a bug in powershell v2 that stops me doing this:
Split-Path : Cannot find drive. A drive with the name '
So, I figured if I count how many spaces there are, and then simply use -split() to split it at the last space.
But, I can't see how to count the number of spaces.
I've found lots of examples that talk about using regex to count complex strings, but I just want to count spaces!
回答1:
Tonnes of ways to do this I imagine but to use your split idea you could do the following.
$split = "c:/folder name/somewhere/application.exe instanceName".Split(" ")
$path = $split[0..($split.count -2)] -Join " "
$instance = $split[-1]
Split the sting by spaces. The number of spaces is represented by the count of strings in the array $split. We join all the strings in the array accept the last intp $path then we take the last entry and assign it to $instance
You could also use .substring and .lastindexof
$string = "c:/folder name/somewhere/application.exe instanceName"
$index = $string.LastIndexOf(" ")
$string.Substring(0,$index)
$string.Substring($index + 1)
I can't see a way to split this directly into an array at this time but outputing as an array would not be a big deal.
$path, $instance
or
$array = @($path,$instance)
回答2:
You can use a regular expression for this:
$s = "c:/folder name/somewhere/application.exe instanceName"
$s -match '(.*) (.*)$'
$matches[1]
$matches[2]
The special variable $matches is populated if the -match operation is true.
$matches[0] contains the original string, and other indexes will exist for the number of groups (patterns in parenthesis) in the regex. In this case: (.*) (.*)$ we have two groups.
来源：https://stackoverflow.com/questions/27191281/count-number-of-spaces-and-split-at-the-last-one