Re: String substitution bug

[marcel.plch]

On Sunday, November 24th, 2024 at 3:05 AM, Lawrence Velázquez <vq@larryv.me> 
wrote:

> On Sat, Nov 23, 2024, at 7:11 PM, marcel.plch via Bug reports for the GNU 
> Bourne Again SHell wrote:
> 

> > I am trying to do some file management in bash and I have strings in
> > this format:
> > 

> > 1 dir/hello.txt
> > 2 dir2/bar.jpg
> > 

> > When I run this substitution:
> > ${FOO/[:space:]*/Hello}
> > I get this result:
> > 1 dir/hHello
> > 

> > The goal is to substitute everything after the first space (including
> > the space) with Hello
> > 

> > Seems like a bug to me.
> 

> 

> It is not a bug. Your pattern is incorrect; you should be using
> "[[:space:]]", not "[:space:]". The former is a bracket expression
> containing the character class expression for the "space" character
> class, while the latter is a bracket expression that matches any
> of the characters ":", "s", "p", "a", "c", or "e".
> 

> $ FOO='1 dir/hello.txt'
> $ echo "${FOO/[[:space:]]*/Hello}"
> 1Hello
> 

> --
> vq

Thank you for clarifictaion.

Maybe adding an extra clarification to the bash manpage
in the Pattern Matching section would be a good idea?

I can imagine I'm not the only one who read this with
a bit of misunderstanding, leading to a few lost hours.
--
Dormouse

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