[Jprogramming] problem with ". (numbers)

[Pascal Jasmin]

this is good,

   _1 ". '44x'
44
    _ ". '44'
44

    _ ". '3 '
3

problem1

_ ". '44x'
_

problem2

0 ". ' '
(empty)

workarounds,

notanumber =: _1&([ = [ ". 'x' ,~ dltb@])