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Perl Medic: Transforming Legacy Code by Peter Scott

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Chapter 2. Surveying the Scene

“What we have inherited from our fathers and mothers is not all that ‘walks in us.’ There are all sorts of dead ideas and lifeless old beliefs. They have no tangibility, but they haunt us all the same and we can not get rid of them. Whenever I take up a newspaper I seem to see Ghosts gliding between the lines. Ghosts must be all over the country, as thick as the sands of the sea.”

— Henrik Ibsen, Ghosts

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2.1. Versions

It’s important to know as soon as possible what version of Perl the program was developed for. This isn’t necessarily the same as the version of Perl it may currently be running against, but find that ...

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