AWK - regex issue

Author

regex issue

mickey

2006-05-11, 9:56 pm

I have lines in a file which either end with a ':' or start with 'Char'.
I have a script that needs to distinguish between the two. When I give

if($0 ~ /:$/) {...} # doesn't work.

However,

if($0 !~ /^Char/) {...} #works fine.

What am I doing wrong here? I am using latest version of gawk.

Thanks,
-M

Ed Morton

2006-05-12, 3:56 am

mickey wrote:
> I have lines in a file which either end with a ':' or start with 'Char'.
> I have a script that needs to distinguish between the two. When I give
>
> if($0 ~ /:$/) {...} # doesn't work.
>
> However,
>
> if($0 !~ /^Char/) {...} #works fine.
>
> What am I doing wrong here? I am using latest version of gawk.
>
> Thanks,
> -M

Your input file probably has control characters or other white space
after the ":"s, like those pesky control-Ms that Windows leaves lying
around. On UNIX, cat -v would show control chars.

Ed.

mickey

2006-05-12, 3:56 am

Ed Morton wrote:
> mickey wrote:
>
>
>
> Your input file probably has control characters or other white space
> after the ":"s, like those pesky control-Ms that Windows leaves lying
> around. On UNIX, cat -v would show control chars.
>
> Ed.

Thanks. That was pretty stupid of me.

-M

martin cohen

2006-05-12, 6:57 pm

mickey wrote:

> Ed Morton wrote:
>
>
>
> Thanks. That was pretty stupid of me.
>
> -M
I've done that too. It's almost a reflex to add
sub(/\r$/, "")
after each line is read.

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