Re: [OT] Re: OT: Gawk match() and numbers in scientific notation

Hermann Peifer wrote:
> 
> $ LC_ALL=en_GB.UTF-8 ./collating_chars.sh [A-C]
>
AáÁàÀăắằẵẳặĂẮẰẴẲẶâấầẫẩậÂẤẦẪẨẬǎǍåǻÅǺäǟÄǞãÃȧǡȦǠąĄāĀảẢȁȀȃȂạẠḁḀẚªæǽǣÆǼǢbBḃḂḅḄḇḆɓƁcC

> 
> 
> $ LC_ALL=da_DK.UTF-8 ./collating_chars.sh [A-C]
>
AaÁáÀàĂẮẰẴẲẶăắằẵẳặÂẤẦẪẨẬâấầẫẩậǍǎǺǻǞǟÃãȦǠȧǡĄąĀāẢảȀȁȂȃẠạḀḁẚªBbḂḃḄḅḆḇƁɓC
> 
> The example shows that in da_DK.UTF-8 locale, the [A-C] range expands to

>  less characters than in en_GB (and most other) locales. The reason is 
> that A_RING and AE_LIGATURE characters sort after Z, according to Danish

> sorting rules.
> 

I just noticed: A umlaut characters are also not part of the Danish 
[A-C] range. Furthermore, Danish sorts AaBbCc, whereas en_GB sorts 
aAbBcC. These are just a few more reasons why character ranges are best 
avoided when working in non-POSIX locales.

Hermann