Re: GNU Parallel Bug Reports Alpha release of GNU Parallel 20110505

[Mag Gam]

just curious, when you create a new version of Parallel are there any
regression tests you run? Currently, I use parallel for a lot of my
tasks just want to make sure it still behaves like the old way.


On Fri, May 6, 2011 at 6:06 AM, Hans Schou <address@hidden> wrote:
> 2011/5/5 Ole Tange <address@hidden>:
>
> Are you making a video? Then I would start like...
>
> As example I will use the image manipulation program 'convert' from
> the ImageMagick package.
> A simple way of converting a file from .png to .jpg looks like:
>  convert foo.png foo.jpg
>
> With a for-loop do like this:
>
> time \
> for file in *.png; do
>  convert $file ${file%.png}.jpg
> done
>
> With GNU Parallel it is:
> time parallel convert {} {.}.jpg ::: *.png
>
> ...and then continue with more parameters.
>
>> This
>> will convert foo.png to jpg with a size of 800 and JPEG-quality of 95.
>>
>> convert -size 800 -quality 95 foo.png foo_800_q95.jpg
>>
>> With a for-loop it can be done on a list of files:
>>
>> time \
>> for file in *.png ; do
>>  convert -size 800 -quality 95 $file ${file##.JPG}_800_q95.jpg
>
> The above does not work. Delete from the end is:
>  ${file%.png}
> or
>  ${file%.*}
> to delete from the last '.' to the end.
>
> I'll look at the rest later.
>
>
> /hans
>
>