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Re: Putting lines from a file into an array

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On 2012-12-04 09:09:40 +0000, Chris said:

> On Mon, 03 Dec 2012 13:20:22 -0800, John Deubert wrote:
> 
> <SNIP>
>> As I say, not as simple as Chris' version, but it does work around the
>> stack limitation. I'd go with Chris' code unless the number of lines was
>> likely to be northward of 1000 lines or so. (By the way, there's some
>> cleanup one could do on this code, but lunch is beckoning.)
> 
> FWIW, that wasn't "my version": I tried to answer the question by making
> minimal changes to the OP's code.
> 
> If I were writing it from scratch myself, I would either (assuming we
> know we'd always have a positionable file stream, or that we're allowed
> to use ReusableStreamDecode) not read in the entire file at all, but just
> find and keep the line(s) of interest at a given time.
> 
> *Or* I would use (sort of) half of your solution, and use a dictionary as
> the "permanent" storage for the file contents, with the line numbers as
> the keys. In addition, I would have a single, large line buffer which
> gets reused for reading from the file, then I would get the actual length
> of each line, and copy it to a new, correctly sized string. Thus
> minimising redundant memory use.
> 
> Creating and copying the strings and writing to the dictionary would be
> appreciably slower, *but* the bottleneck will always be reading from the
> file. And on a decent interpreter, there shouldn't be an appreciable
> difference in performance between iterating through a dictionary vs an
> array.
> 
> I feel both those would scale better than using an array.
> 
> Chris

No offense intended. I assumed you knew about the stackoverflow problem 
and were presenting a minimum-change solution. I called it "Chris' 
solution" because, um, well, I had to call it *something.*

- J
-- 
========
John Deubert
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Putting lines from a file into an array Cecil Westerhof <Cecil@decebal.nl> - 2012-12-02 21:02 +0100
  Re: Putting lines from a file into an array Chris <cjl@spamcop.net> - 2012-12-02 20:47 +0000
    Re: Putting lines from a file into an array Cecil Westerhof <Cecil@decebal.nl> - 2012-12-03 00:52 +0100
      Re: Putting lines from a file into an array Don Lancaster <don@tinaja.com> - 2012-12-05 11:58 -0700
        Re: Putting lines from a file into an array "luser.droog" <luser.droog@gmail.com> - 2012-12-05 23:19 -0600
    Re: Putting lines from a file into an array John Deubert <john@acumentraining.com> - 2012-12-03 13:20 -0800
      Re: Putting lines from a file into an array "luser.droog" <luser.droog@gmail.com> - 2012-12-04 00:58 -0600
      Re: Putting lines from a file into an array Chris <cjl@spamcop.net> - 2012-12-04 09:09 +0000
        Re: Putting lines from a file into an array John Deubert <john@acumentraining.com> - 2012-12-04 07:03 -0800
          Re: Putting lines from a file into an array Chris <cjl@spamcop.net> - 2012-12-04 17:46 +0000
        Re: Putting lines from a file into an array Cecil Westerhof <Cecil@decebal.nl> - 2012-12-04 17:17 +0100
  Re: Putting lines from a file into an array "luser.droog" <luser.droog@gmail.com> - 2012-12-02 15:31 -0600
    Re: Putting lines from a file into an array Cecil Westerhof <Cecil@decebal.nl> - 2012-12-03 02:19 +0100
      Re: Putting lines from a file into an array "luser.droog" <luser.droog@gmail.com> - 2012-12-02 23:28 -0600
        Re: Putting lines from a file into an array Cecil Westerhof <Cecil@decebal.nl> - 2012-12-03 10:01 +0100
  Re: Putting lines from a file into an array luser droog <luser.droog@gmail.com> - 2016-08-01 13:25 -0700
    Re: Putting lines from a file into an array JohnF <john@please.see.sig.for.email.com> - 2016-08-02 03:39 +0000
      Re: Putting lines from a file into an array luser droog <luser.droog@gmail.com> - 2016-08-02 21:58 -0700
        Re: Putting lines from a file into an array Tonton Th <tTh@nowhere.invalid> - 2016-08-03 05:10 +0000
        Re: Putting lines from a file into an array luser droog <luser.droog@gmail.com> - 2016-08-02 22:20 -0700
          Re: Putting lines from a file into an array luser droog <luser.droog@gmail.com> - 2016-08-02 22:35 -0700
            Re: Putting lines from a file into an array JohnF <john@please.see.sig.for.email.com> - 2016-08-03 06:21 +0000
            Re: Putting lines from a file into an array JohnF <john@please.see.sig.for.email.com> - 2016-08-03 06:32 +0000
              Re: Putting lines from a file into an array luser droog <luser.droog@gmail.com> - 2016-08-22 22:31 -0700

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