Re: Gawk match() and numbers in scientific notation

On Wednesday 7 May 2008 22:16, schuler.steffen@[EMAIL PROTECTED]
 wrote:

> Here the collating sequence of the alphabetical ([:alpha:]) letters
> using gawk and sort for the locales C, en_US, and en_US.UTF-8
> (using Fedora Core 7 and the current gawk from CVS):
> 
> $ cat collating_chars.sh
> #!/bin/bash
> # collating sequence of the alphabetic letters
> # in an externally specified locale
> gawk 'BEGIN {
>   for (i= 1; i <= 32767; ++i) {
>     c = sprintf("%c", i)
>     if (c ~ /[[:alpha:]]/)
>       a[c] = 1
>   }
>   for (c in a)
>     print  c
> }' |
> sort |
> gawk '{
>   printf "%s", $0
> }
> END {
>   print ""
> }'
> $ LANG=C LC_ALL=C ./collating_chars.sh
> ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz
> $ LANG=en_US LC_ALL=en_US ./collating_chars.sh
>
>
µaAáÁàÀâÂåÅäÄãêæÆbBcCçÇdDðÐeEéÉèÈêÊëËfFgGhHiIíÍìÌîÎïÏjJkKlLmMnNñÑoOóÓò
ÒôÔöÖõÕøغpPqQrRsSßtTuUúÚùÙûÛüÜvVwWxXyYýÝÿzZþÞ
> $ LANG=en_US.UTF-8 LC_ALL=en_US.UTF-8 ./collating_chars.sh
> aAbBcCdDeEfFgGhHiIjJkKlLmMnNoOpPqQrRsStTuUvVwWxXyYzZ
> $

This actually extends Ed's original idea, adding sort ordering (an useful
thing, thanks).
What still stumps me is that in my locale (en_GB.utf8) the
expressions '[a-z]', '[[:lower:]]', and '[[:alpha:]]' all DO match
lowercase accented characters; nonetheless, using either of them with your
script does not show accented characters. The same happens with
en_US.utf8,
as can be seen in your output. I used gawk-3.1.6a from CVS.

-- 
All the commands are tested with bash and GNU tools, so they may use
nonstandard features. I try to mention when something is nonstandard (if
I'm aware of that), but I may miss something. Corrections are welcome.