What does a double exclamation mark (!!) in Fsharp / FAKE?
I've come across the following code and can not understand what operation the double exclamation marks provide. This code-snipet is from a FAKE script used in a CICD system. Microsoft's Symbol and Operator Reference does not list this operator, nor can I find it in FAKE's API Reference . !! (projectPackagePath + "/*.zip") |> Seq.iter(fun path -> trace ("Removing " + path) ShellExec tfCommand ("delete " + path + " /noprompt") Another example of usage let buildLabelFiles = !!(labelPath @@ "*.txt") Tomas Petricek The !! operator takes a file pattern and returns a collection of files matching the