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Re: What does zip mean?

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From Terry Reedy <tjreedy@udel.edu>
Subject Re: What does zip mean?
Date Mon, 10 Nov 2014 19:39:22 -0500
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On 11/10/2014 3:36 PM, Cameron Simpson wrote:
> On 10Nov2014 17:19, Grant Edwards <invalid@invalid.invalid> wrote:
>> On 2014-11-10, giacomo boffi <giacomo_boffi@inwind.it> wrote:
>>> To help you understanding what is the `zip` builtin, please forget
>>> about PKZip etc and think about the _zip fastener_ or _zipper_ in
>>> your bag or in your trousers
>>>
>>> In the bag you have two sequences of teeth that the zipper
>>> binds together in interlocking pairs
>>
>> No, you don't. That's not how a zipper works.  Each tooth from side A,
>> isn't bound with one from side B.  It's bound with _two_ of them from
>> side B. And each of those is in turn bound with an additional tooth
>> from side A, and so on...
>
> This is true, but the analogy is still the correct one:-)

Perhaps ironically in this context, zippers replaced hook-and-eye 
fastening, where the two sequences *are* matched in parallel.  "Hookless 
fastener" was one of the original names (Wikipedia).

-- 
Terry Jan Reedy

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Thread

What does zip mean? satishmlmlml@gmail.com - 2014-11-09 02:44 -0800
  Re: What does zip mean? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-11-09 21:58 +1100
    Re: What does zip mean? milos zorica <miloshzorica@gmail.com> - 2014-11-09 08:06 -0300
  Re: What does zip mean? giacomo boffi <giacomo_boffi@inwind.it> - 2014-11-10 17:48 +0100
    Re: What does zip mean? Grant Edwards <invalid@invalid.invalid> - 2014-11-10 17:19 +0000
      Re: What does zip mean? Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2014-11-11 10:04 +1300
      Re: What does zip mean? Cameron Simpson <cs@zip.com.au> - 2014-11-11 07:36 +1100
      Re: What does zip mean? Terry Reedy <tjreedy@udel.edu> - 2014-11-10 19:39 -0500
      Re: What does zip mean? giacomo boffi <pecore@pascolo.net> - 2014-11-13 23:10 +0100
      Re: What does zip mean? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-11-14 22:06 +1100

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