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Re^3: Nobody Expects the Agile Imposition (Part VI): Architecture

by BrowserUk (Pope)
on Feb 01, 2011 at 08:41 UTC ( #885439=note: print w/ replies, xml ) Need Help??


in reply to Re^2: Nobody Expects the Agile Imposition (Part VI): Architecture
in thread Nobody Expects the Agile Imposition (Part VI): Architecture

To take another example, while I view Perl 6 as a "rewrite" of Perl 5, I suspect many monks would disagree with that view; a couple of them have already made that plain in this thread. Note however that Larry Wall at least seems to view Perl 6 as a "rewrite" of Perl:

Perl 5 was my rewrite of Perl. I want Perl 6 to be the community's rewrite of Perl and of the community.

Sorry to be pedantic--it's not usually my thing--but I think you subtly reinterpreting Mr Wall's words in support of your argument.

The man himself will set me straight if it is of interest to him, but I think that "Perl 6 to be the ... rewrite of Perl" is considerably different from "Perl 6 as a "rewrite" of Perl 5".

'Perl', unadorned by the version number, is neither an implementation that can be re-written, nor a design evolution that can be reimplemented. It is a 'only'--and precisely completely--a concept; an ethos; an idea.

As such, Perl 5 wasn't a rewrite of the Perl 4 implementation; but rather a rewrite of the Perl design that was then implemented as Perl 5. Ditto for Perl 6 relative to Perl 5.

The (one; but a good one) definition of 'rewrite' in the context of software is:

A rewrite in computer programming is the act or result of re-implementing a large portion of existing functionality without re-use of its source code. When the rewrite is not using existing code at all, it is common to speak of a rewrite from scratch. ..

On the basis of both that definition, and my limited expereince of both, calling the feature rich Subversion a rewrite of the CVS, is like calling the Ford Focus a rewrite of the Ford Model-T. They serve a similar niche and target audience; but the way they go about achieving it is so utterly different.

The goal of re-implementing the same basic functionality is present; but the provision of so much additional functionality makes the term 'rewrite' an inadequate description of the reality.


Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.


Comment on Re^3: Nobody Expects the Agile Imposition (Part VI): Architecture
Re^4: Nobody Expects the Agile Imposition (Part VI): Architecture
by eyepopslikeamosquito (Canon) on Feb 01, 2011 at 11:03 UTC

      No. Despite my location, I'm not a betting man. But if I was, I'd confine my flutters to things with better odds of predictability that an American's use of English--pachinko, spread bets or snow on christmas day :)

      More seriously. To my mind a re-write implies writing, something that was already written, again.

      Perl 6 had (has?) never been written before, so it cannot be a rewrite.


      Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
      "Science is about questioning the status quo. Questioning authority".
      In the absence of evidence, opinion is indistinguishable from prejudice.

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