Question

What does the following expression in a .ps1(powershell script) file mean?

$row=".+\\(.+\.exe)";

From what I understand, “\” is used to escape and makes the proceeding character be taken literally. But I am confused by the usage of “.” here. Can someone help me with this?

Answer 1

This looks like this is part of a regular expression that matches file paths. Breaking this regular expression down:

.+        matches one or more characters (of anything)
\\        matches the '\' character (needs the \ to escape the \ character)
(    
   .+     matches one or more characters (of anything)
   \.     matches the '.' character (needs the \ to escape the . character)
   exe    matches exe
)

The . is a special character that means match any character.