Re: Gawk match() and numbers in scientific notation

On May 6, 1:28=A0pm, pk <p...@[EMAIL PROTECTED]
> wrote:
> On Tuesday 6 May 2008 13:16, Hermann Peifer wrote:
>
> > I am also wondering about the non-matches in these cases:
>
> > $ gawk 'BEGIN{print match(100e-3,/[A-Z]/)}'
> > 0
> > $ gawk 'BEGIN{print match(100E3,/[A-Z]/)}'
> > 0
>
> Unlike before, here you are asking awk to do number-to-string
conversion.
> The problem is (I think) that the numbers lose the Es when they are
> converted to strings:
>
> $ gawk 'BEGIN{printf "%s\n", 100E3}'
> 100000
> $ gawk 'BEGIN{printf "%s\n", 100e-3}'
> 0.1
>
> Compare with this (which also shows the influence of the locale):
>
> $ gawk 'BEGIN{print match("100E3",/[A-Z]/)}'
> 4
> $ gawk 'BEGIN{print match("100e-3",/[A-Z]/)}'
> 4
> $ LC_ALL=3DC gawk 'BEGIN{print match("100E3",/[A-Z]/)}'
> 4
> $ LC_ALL=3DC gawk 'BEGIN{print match("100e-3",/[A-Z]/)}'
> 0
>

Thanks. This seems to explain the matching logic.

Hermann