sed – need an example for ”\digit”

[Michael Welle]

Hello,

Johnny Rosenberg <gurus.knugum at gmail.com> writes:

> http://www.delorie.com/gnu/docs/sed/sed_5.html
>
> On that page saw this:
>
> ”\digit
> Matches the digit-th \(...\) reference in the regular expression.”
>
> But I failed to create an example that works.
> Anyone?

 echo 'hello crude world' | sed -e 's/^\([ehlo]\+\) \([^ ]*\)\(.*\)$/\1
 x \2  x \3/

\n is a back reference to the n. occurrence of a pair of braces.

Regards
hmw

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