On Monday, 26 March 2018 at 06:48:45 UTC, rumbu wrote: > isNumeric applies to a type, not to a variable => IsNumeric!X On Monday, 26 March 2018 at 06:51:48 UTC, arturg wrote: > use the type not the variables: > isNumeric!X && isNumeric!Y Ah, missed that. Thanks a bunch!