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$ ls test
bar_002.tst  baz_003.tst  faz_004.tst  foo_001.tst
...
test/baz_003.tst 003
 004

 glob    In list context, returns a (possibly empty) list of filename
         expansions on the value of EXPR such as the standard Unix she
+ll
         /bin/csh would do. In scalar context, glob iterates through
         such filename expansions, returning undef when the list is
         exhausted.