Re: Gawk match() and numbers in scientific notation

Ed Morton wrote:
> 
> On 5/6/2008 6:16 AM, Hermann Peifer wrote:
>> Hi,
>>
>>
>> I am somehwat puzzled with match() results for numbers in scientific
>> notation. See below.
>>
>> $ cat testdata
>> 100
>> 100e-3
>> 100E3
>>
>> I am wondering what kind of uppercase character is matched in record
>> 2:
>>
>> $ gawk '{print $1,match($1,/[A-Z]/)}' testdata
> 
> There may not be an uppercase character matching. [A-Z] represents the
list of
> characters in between the character A and the character Z in your locale
- that
> does NOT mean it has to be upper case characters. For example, your
locale might
> consider characters ordered as:
> 
> 	aAbBcCdDeEfF....zZ

You are right: in my locale en_GB.UTF-8, [A-Z] matches all upper and 
lower case letters (including accented letters), except lower case a. In 
return [a-z] matches all upper/lower case letters, except upper case Z.


> 
> so "e" would sit between "A" and "Z". That's why you should use
character
> classes instead of specific ranges, e.g.:
> 
> 	gawk '{print $1,match($1,/[[:upper:]]/)}' testdata
> 

I will do so. Thanks, Hermann