If the number of digits is unspecified (but there is at least one digit), we can use some:
parse "XY67" ["XY" some digit] ;== trueparse "XY" ["XY" some digit] ;== falseparse "XY2915" ["XY" some digit] ;== true
any can be used instead of some, matching the pattern even when there is no digit in the input:
parse "XY67" ["XY" any digit] ;== trueparse "XY" ["XY" any digit] ;== true
To summarize, some is 1 or more, any is 0 or more.
any and some only apply to the first item that follows them. For example:
parse "XXY" [some "X" "Y"] ;== trueparse "XYXY" [some "X" "Y"] ;== false
In the last line, the second "X" is not matched. To make this work, we could use the following:
parse "XYXY" [some ["X" "Y"]] ;== true
Or even simpler: ...
