DELTA(A)       User Contributed Perl Documentation       DELTA(A)



NAME
       PDL::Delta - PDL changes between V1.0 and V2.0

DESCRIPTION
       This file is an attempt to list the major user-visible
       changes between PDL versions 1.0 and 2.0.

Core Changes
       Piddles are not hashes any more:

           $a = zeroes 10,10;
           $$a{FOO} = "bar"

       doesn't work. They are currently scalar references (to
       opaque C structures in finer terms) because of speed as
       well as syntactic issues. If you want to have a hash, use

           $a->hdr()

       which returns a reference to an anonymous hash. Also, sub-
       classing works if you store a piddle in the hash member
       ``PDL''.

       There are also many core enhancements to support Dataflow
       and Slicing tricks, but these do not introduce any incom-
       patbilities.

       Incompatible Changes vs 1.11


       rgrep
           Order of the arguments has changed.

       copy method
           No longer copies the header. This may not be a misfea-
           ture.

Documentation Changes
       Many of the base and library pods were updated.

SEE ALSO
       The Changes file for exhaustive details on what changed.

       The INSTALL file for how to build PDL.

       The README file for general stuff.

HISTORY
       pdldelta was inspired by perldelta  man page in the perl
       5.004 distribution.



perl v5.6.1                 1999-12-09                   DELTA(A)