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Re: Oh look, another language (ceylon)

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Date Mon, 18 Nov 2013 23:36:29 +1100
Subject Re: Oh look, another language (ceylon)
From Chris Angelico <rosuav@gmail.com>
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On Mon, Nov 18, 2013 at 11:29 PM, Ian Kelly <ian.g.kelly@gmail.com> wrote:
>
> On Nov 18, 2013 3:06 AM, "Chris Angelico" <rosuav@gmail.com> wrote:
>>
>> I'm trying to figure this out. Reading the docs hasn't answered this.
>> If each character in a string is a 32-bit Unicode character, and (as
>> can be seen in the examples) string indexing and slicing are
>> supported, then does string indexing mean counting from the beginning
>> to see if there were any surrogate pairs?
>
> The string reference says:
>
> """Since a String has an underlying UTF-16 encoding, certain operations are
> expensive, requiring iteration of the characters of the string. In
> particular, size requires iteration of the whole string, and get(), span(),
> and segment() require iteration from the beginning of the string to the
> given index."""
>
> The get and span operations appear to be equivalent to indexing and slicing.

Right, that's what I was looking for and didn't find. (I was searching
the one-page reference manual rather than reading in detail.) So, yes,
they're O(n) operations. Thanks for hunting that down.

ChrisA

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Thread

Oh look, another language (ceylon) Neal Becker <ndbecker2@gmail.com> - 2013-11-13 14:33 -0500
  Re: Oh look, another language (ceylon) Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2013-11-17 16:41 +1300
    Re: Oh look, another language (ceylon) Chris Angelico <rosuav@gmail.com> - 2013-11-17 15:10 +1100
    Re: Oh look, another language (ceylon) Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-11-17 05:48 +0000
      Re: Oh look, another language (ceylon) jkn <jkn_gg@nicorp.f9.co.uk> - 2013-11-17 00:34 -0800
    Re: Oh look, another language (ceylon) Mark Lawrence <breamoreboy@yahoo.co.uk> - 2013-11-17 12:41 +0000
      Re: Oh look, another language (ceylon) Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2013-11-18 11:33 +1300
        Re: Oh look, another language (ceylon) Chris Angelico <rosuav@gmail.com> - 2013-11-18 11:42 +1100
        Re: Oh look, another language (ceylon) Tim Daneliuk <tundra@tundraware.com> - 2013-11-17 16:48 -0600
          Re: Oh look, another language (ceylon) Mark Lawrence <breamoreboy@yahoo.co.uk> - 2013-11-18 23:51 +0000
            Re: Oh look, another language (ceylon) Tim Daneliuk <tundra@tundraware.com> - 2013-11-18 18:31 -0600
    Re: Oh look, another language (ceylon) Rick Johnson <rantingrickjohnson@gmail.com> - 2013-11-17 16:18 -0800
      Re: Oh look, another language (ceylon) Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2013-11-18 19:45 +1300
        Re: Oh look, another language (ceylon) Chris Angelico <rosuav@gmail.com> - 2013-11-18 17:56 +1100
          Re: Oh look, another language (ceylon) wxjmfauth@gmail.com - 2013-11-18 01:44 -0800
            Re: Oh look, another language (ceylon) Mark Lawrence <breamoreboy@yahoo.co.uk> - 2013-11-18 09:56 +0000
            Re: Oh look, another language (ceylon) Chris Angelico <rosuav@gmail.com> - 2013-11-18 21:04 +1100
              Re: Oh look, another language (ceylon) Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-11-18 13:31 +0000
                Re: Oh look, another language (ceylon) Chris Angelico <rosuav@gmail.com> - 2013-11-19 00:39 +1100
                Re: Oh look, another language (ceylon) Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-11-18 14:30 +0000
                Re: Oh look, another language (ceylon) Dave Angel <davea@davea.name> - 2013-11-18 15:37 -0500
                Re: Oh look, another language (ceylon) Steven D'Aprano <steve@pearwood.info> - 2013-11-19 02:29 +0000
                Re: Oh look, another language (ceylon) Chris Angelico <rosuav@gmail.com> - 2013-11-19 10:25 +1100
                Re: Oh look, another language (ceylon) Steven D'Aprano <steve@pearwood.info> - 2013-11-19 02:13 +0000
                Re: Oh look, another language (ceylon) Chris Angelico <rosuav@gmail.com> - 2013-11-19 13:54 +1100
                Re: Oh look, another language (ceylon) Chris Angelico <rosuav@gmail.com> - 2013-11-19 13:56 +1100
                Re: Oh look, another language (ceylon) wxjmfauth@gmail.com - 2013-11-19 01:10 -0800
                Re: Oh look, another language (ceylon) Bob Martin <bob.martin@excite.com> - 2013-11-20 08:19 +0000
            Re: Oh look, another language (ceylon) Ian Kelly <ian.g.kelly@gmail.com> - 2013-11-18 05:29 -0700
            Re: Oh look, another language (ceylon) Chris Angelico <rosuav@gmail.com> - 2013-11-18 23:36 +1100
              Re: Oh look, another language (ceylon) Piet van Oostrum <piet@vanoostrum.org> - 2013-11-18 10:31 -0400
                Re: Oh look, another language (ceylon) Mark Lawrence <breamoreboy@yahoo.co.uk> - 2013-11-18 15:06 +0000
        Re: Oh look, another language (ceylon) Rick Johnson <rantingrickjohnson@gmail.com> - 2013-11-18 19:33 -0800
          Re: Oh look, another language (ceylon) Steven D'Aprano <steve@pearwood.info> - 2013-11-19 07:00 +0000
            Re: Oh look, another language (ceylon) Chris Angelico <rosuav@gmail.com> - 2013-11-19 18:18 +1100
            Re: Oh look, another language (ceylon) Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2013-11-20 18:25 +1300
  Re: Oh look, another language (ceylon) Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-11-18 14:56 +0000

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