string-join
Joins the list of strings supplied as argument into a string. Optionally, inserts the separator supplied as argument in between each string.
Signature
string-join(list:list of string, separator:string="") -> string  | 
Parameters
Name  | Type  | Description  | 
|---|---|---|
list  | list of string  | The input list of string.  | 
separator  | string  | Optional argument. Specifies the separator by which all joined strings should be delimited.  | 
Examples
The following expression will return the string a;b;c:
string-join(list('a', 'b', 'c'), ';')  |