bug#20725: Shuf problem

[Stephane Chazelas]

2015-06-03 14:33:35 +0100, Pádraig Brady:
> On 03/06/15 14:20, Federico Alves wrote:
> > I think that shuf should have an option, may set ON by default, to avoid 
> > empty lines in a file when shuffling it. if a file has 100 lines and ten 
> > are simply returns, 99% of the time I do not want an empty line, I want 
> > only the real lines.
> 
> We would only consider that if it provided functional benefits
> or large performance gains.  Neither would be the case here I think
> compared to some simple preprocessing like:
> 
>  sed '/^$/d' | shuf
[...]

Or 

grep -v '^$' | shuf

or

grep . | shuf

(that one will also exclude lines that contain sequences of
bytes that don't form any valid characters).

-- 
Stephane