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Re: How to parse an array?

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On 6/26/2017 9:36 AM, Eric Sosman wrote:
> On 6/26/2017 8:10 AM, Eric Douglas wrote:
>> On Saturday, June 24, 2017 at 6:03:03 AM UTC-4, Robert Klemme wrote:
>>> Plus, there are neither arrays nor parsing involved.  From the code it
>>> seems he wants to use a data structure as index into the first one.  The
>>> thing is, we do not know where the index numbers come from.  Maybe they
>>> could be stored in a static array because they never change.  Without
>>> context the code does not make much sense to me.
>>
>> ArrayList is the simplest way to do it that I'm aware of.
>> Both arrays could be anything, from String[] to LinkedList, but they 
>> just need to be maintained in simple order and they need to be 
>> dynamic.  I believe ArrayList<String> is simpler than String[] when 
>> you need to be able to insert and remove elements.  The numbers are 
>> the indexes of the elements to be returned so yes they will always be 
>> valid indexes and yes they will change.
> 
>      It's true that dynamic insertions and deletions are simpler to write
> with an ArrayList<Thing> than with a Thing[].  But your original post
> didn't mention simplicity as a goal; rather, you asked for "a more
> efficient way."
> 
>      Open-coded Thing[] will be no less efficient than ArrayList<Thing>
> (barring silly mistakes in the open code), and stands a good chance of
> being more efficient.

I think the most likely for a real world application is that there will
not be a measurable performance difference.

Which of course sort of favor ArrayList<Thing>.

Arne

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Thread

How to parse an array? Eric Douglas <e.d.programmer@gmail.com> - 2017-06-20 12:18 -0700
  Re: How to parse an array? Knute Johnson <nospam@rabbitbrush.frazmtn.com> - 2017-06-20 14:49 -0500
  Re: How to parse an array? Arne Vajhøj <arne@vajhoej.dk> - 2017-06-20 16:15 -0400
  Re: How to parse an array? Eric Sosman <esosman@comcast-dot-net.invalid> - 2017-06-20 16:23 -0400
  Re: How to parse an array? Robert Klemme <shortcutter@googlemail.com> - 2017-06-24 12:02 +0200
    Re: How to parse an array? Eric Douglas <e.d.programmer@gmail.com> - 2017-06-26 05:10 -0700
      Re: How to parse an array? Eric Sosman <esosman@comcast-dot-net.invalid> - 2017-06-26 09:36 -0400
        Re: How to parse an array? Eric Douglas <e.d.programmer@gmail.com> - 2017-06-26 07:47 -0700
          Re: How to parse an array? Martin Gregorie <martin@address-in-sig.invalid> - 2017-06-26 15:47 +0000
        Re: How to parse an array? Arne Vajhøj <arne@vajhoej.dk> - 2017-06-26 20:37 -0400
      Re: How to parse an array? lewbloch@gmail.com - 2017-06-27 12:29 -0700
        Re: How to parse an array? Eric Douglas <e.d.programmer@gmail.com> - 2017-06-27 12:50 -0700
          Re: How to parse an array? Martin Gregorie <martin@address-in-sig.invalid> - 2017-06-27 20:05 +0000
            Re: How to parse an array? Eric Douglas <e.d.programmer@gmail.com> - 2017-06-27 14:01 -0700
              Re: How to parse an array? Martin Gregorie <martin@address-in-sig.invalid> - 2017-06-27 22:34 +0000
                Re: How to parse an array? Eric Douglas <e.d.programmer@gmail.com> - 2017-06-28 05:10 -0700
                Re: How to parse an array? Martin Gregorie <martin@address-in-sig.invalid> - 2017-06-28 19:09 +0000
                Re: How to parse an array? Eric Douglas <e.d.programmer@gmail.com> - 2017-06-28 13:02 -0700
                Re: How to parse an array? Martin Gregorie <martin@address-in-sig.invalid> - 2017-06-28 21:55 +0000
                Re: How to parse an array? Eric Douglas <e.d.programmer@gmail.com> - 2017-06-30 06:10 -0700
                Re: How to parse an array? Martin Gregorie <martin@address-in-sig.invalid> - 2017-06-30 16:52 +0000
  Re: How to parse an array? Jerry Stuckle <jstucklex@attglobal.net> - 2017-06-24 16:34 -0400
    Re: How to parse an array? Martin Gregorie <martin@address-in-sig.invalid> - 2017-06-24 22:42 +0000
      Re: How to parse an array? Jerry Stuckle <jstucklex@attglobal.net> - 2017-06-24 20:05 -0400
      Re: How to parse an array? Robert Klemme <shortcutter@googlemail.com> - 2017-06-25 12:20 +0200

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