Extract unspecified length of characters to the right of a pattern

I have a function that returns a string value:

"D:\Put_Your_Temporary_Files_HERE\Auto_Receive\user_out-automation.ini:9:IpAccessListEx=1|131.203.181.66|1|10.21.5.34|1|109.146.13.135|1|10.21.3.3|"

Everything after the equals sign can change depending on what's return in my function. What I want to do is return all text after the equals (=) sign.

Any help will be greatly appreciated.

Thanks Rob

CodePudding user response：

You can use Select-String Cmdlet with -Pattern parameter to specify the text to find on input

$r = "IPAddressEx=|2.33.31.45|108.38.48.17|" | Select-String -Pattern "IPAddressEx=(.*)"

It return Microsoft.PowerShell.Commands.MatchInfo object on successful pattern match. So to get the sub group from match you have to the access Matches property.

$r.Matches.Groups[1].Value

CodePudding user response：

You can do a simple -split like

$str = "D:\Put_Your_Temporary_Files_HERE\Auto_Receive\user_out-automation.ini:9:IpAccessListEx=1|131.203.181.66|1|10.21.5.34|1|109.146.13.135|1|10.21.3.3|"
($str -split '=', 2)[-1]

Result: 1|131.203.181.66|1|10.21.5.34|1|109.146.13.135|1|10.21.3.3|

OR use -replace:

$str = "D:\Put_Your_Temporary_Files_HERE\Auto_Receive\user_out-automation.ini:9:IpAccessListEx=1|131.203.181.66|1|10.21.5.34|1|109.146.13.135|1|10.21.3.3|"
$str -replace '.*=(. )$', '$1'

Result: 1|131.203.181.66|1|10.21.5.34|1|109.146.13.135|1|10.21.3.3|

OR use the regex .Match() method

$str = "D:\Put_Your_Temporary_Files_HERE\Auto_Receive\user_out-automation.ini:9:IpAccessListEx=1|131.203.181.66|1|10.21.5.34|1|109.146.13.135|1|10.21.3.3|"
([regex]'.*=(. )$').Match($str).Groups[1].Value

Result: 1|131.203.181.66|1|10.21.5.34|1|109.146.13.135|1|10.21.3.3|

OR even the String methods IndexOf() combined with SubString():

$str = "D:\Put_Your_Temporary_Files_HERE\Auto_Receive\user_out-automation.ini:9:IpAccessListEx=1|131.203.181.66|1|10.21.5.34|1|109.146.13.135|1|10.21.3.3|"
$str.Substring($str.IndexOf("=")   1)

^{Although this last alternative is not advisable because IndexOf() may return -1 if the search string is not found}

CodePudding user response：

An alternative to Abdul's answer is to use regular expressions. For your case, this should work:

$ret = [regex]::match($string,'(?<=.*=).*')
if ($ret.Success) {
    $tag = $ret.Value
}

The regex uses a positive lookbehind, which finds all characters which precede an '='. It then finds all characters which follow it. It stores the object in $ret. You can get your value with $ret.Value. This returns 1|131.203.181.66|1|10.21.5.34|1|109.146.13.135|1|10.21.3.3|