I need a function to create a canonical version of a folder path, with leading but not trailing \. For example, typical input could be \mx\durango\ or mx\durango\ or mx\durango\. Output: \mx\durango My solution is so complicated that I think there must be a better way. First, I wrote companion functions to delete the leading or trailing or leading slashes if any: Function NoLeadSlash=`%@If[%@Left[1,%1] == \,%@Instr[1,,%1],%1]` Function NoTrailSlash=`%@If[%@Right[1,%1] == \, %@Instr[0,%@Eval[%@Len[%1]-1],%1],%1]` (please ignore the gap or line break after \, ) The first one isn't too bad, but for the second do I really need to use @LEN? And further, having used it and subtracting 1, is there something better than @Eval? Given the above, the following to finish the job are not too complex. Function NoEndSlash=`%@NoLeadSlash[%@NoTrailSlash[%1]]` Function LeadSlash=`%@If[%1. == .,,\%@NoEndSlash[%1]]` What am I missing?