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change in vw7.7 string sorting?

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MarkPetersen

change in vw7.7 string sorting?

I searched a little and couldn't find anything on how strings are now sorted in vw7.7. I'm seeing a difference in behavior from vw7.4 to vw7.7
In vw7.4, sorting results in
SortedCollection ('00P_BEOLCAP11' '00P_BEOLCAP1_p101p2002' '00P_BEOLCAP1_p151p1753' '00P_BEOLCAP1_p176p2004' '00P_BEOLCAP1_p1p1005' '00P_BEOLCAP1_p1p256' '00P_BEOLCAP1_p26p507' '00P_BEOLCAP1_p51p758' '00P_BEOLCAP1_p76p1009')

In vw7.7, sorting results in
SortedCollection ('00P_BEOLCAP1_p101p2002' '00P_BEOLCAP1_p151p1753' '00P_BEOLCAP1_p176p2004' '00P_BEOLCAP1_p1p1005' '00P_BEOLCAP1_p1p256' '00P_BEOLCAP1_p26p507' '00P_BEOLCAP1_p51p758' '00P_BEOLCAP1_p76p1009' '00P_BEOLCAP11')

So '00P_BEOLCAP11' is at the end instead of at the beginning where I would expect it. The difference seems to be how $_ compares to $1. In both vw7.4 and vw7.7 $1<$_ evaluates to true, so I'm confused as to why '00P_BEOLCAP11' would be at the end.

Locale is set to #C.

Thanks for any insight.

Mark Petersen

Dennis smith-4

Re: change in vw7.7 string sorting?

This SHOULD have made it into the release notes, but did not.

You can return to the old collation by
StringCollationPolicy collationAlgorithm: #Fast

On 3/12/2010 3:32 PM, MarkPetersen wrote:

> I searched a little and couldn't find anything on how strings are now sorted
> in vw7.7. I'm seeing a difference in behavior from vw7.4 to vw7.7
> In vw7.4, sorting results in
> SortedCollection ('00P_BEOLCAP11' '00P_BEOLCAP1_p101p2002'
> '00P_BEOLCAP1_p151p1753' '00P_BEOLCAP1_p176p2004' '00P_BEOLCAP1_p1p1005'
> '00P_BEOLCAP1_p1p256' '00P_BEOLCAP1_p26p507' '00P_BEOLCAP1_p51p758'
> '00P_BEOLCAP1_p76p1009')
>
> In vw7.7, sorting results in
> SortedCollection ('00P_BEOLCAP1_p101p2002' '00P_BEOLCAP1_p151p1753'
> '00P_BEOLCAP1_p176p2004' '00P_BEOLCAP1_p1p1005' '00P_BEOLCAP1_p1p256'
> '00P_BEOLCAP1_p26p507' '00P_BEOLCAP1_p51p758' '00P_BEOLCAP1_p76p1009'
> '00P_BEOLCAP11')
>
> So '00P_BEOLCAP11' is at the end instead of at the beginning where I would
> expect it. The difference seems to be how $_ compares to $1. In both vw7.4
> and vw7.7 $1<$_ evaluates to true, so I'm confused as to why '00P_BEOLCAP11'
> would be at the end.
>
> Locale is set to #C.
>
> Thanks for any insight.
>
> Mark Petersen
>

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MarkPetersen

Re: change in vw7.7 string sorting?

Thanks for the information, Dennis. That works.

Mark Petersen

Alan Knight-2

Re: change in vw7.7 string sorting?

Yes, note that this change was part of the change to using Unicode collation in general. The #Fast collation, while definitely faster, and more consistent with the older one, will be less correct on languages other than English. There are also unicode variations, which I know deal with punctuation differently.

At 08:58 AM 2010-03-15, MarkPetersen wrote:

Thanks for the information, Dennis. That works.

Mark Petersen
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