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From: David Kirkby on 7 Jun 2010 19:45
On Jun 7, 8:38 pm, Harry <harryooopot...(a)hotmail.com> wrote:
> On Jun 7, 12:47 am, David Kirkby <drkir...(a)gmail.com> wrote:
>
> > I have a list of files
> [...]
> > and would like to remove the hyphen and all characters after them.
>
> [...]
>
> sed -e 's/-.*//'

Thank you - that is just what I wanted.

Dave
From: Janis Papanagnou on 7 Jun 2010 19:51
David Kirkby wrote:
> On Jun 7, 10:42 am, Andrew McDermott <a.p.mcderm...(a)NOSPAM-rl.ac.uk>
> wrote:
>> David Kirkby wrote:
>>> I think 'sed' is the tool for this, though I may be wrong.
>>> I have a list of files
>> Do you mean you have a set of files in a directory
>>
>>
>>
>>
>>
>>> atlas-3.8.3.p12.spkg
>>> blas-20070724.spkg
>>> boehm_gc-7.1.p5.spkg
>>> boost-cropped-1.34.1.spkg
>
>>> and would like to remove the hyphen and all characters after them. So
>>> I get
>> and you want to rename them?
>
> No, I do not want to rename them. I just want a list, without the
> version numbers. (These are mathematical packages with various version
> numbers. I just want a list of the packages.
>

Then pipe your ls output[*] into the sed command that pk suggested.

[*] Of course you don't need ls(1), you can as well use printf (which
is often a shell builtin) and avoid the extra process.

Janis
From: Janis Papanagnou on 7 Jun 2010 19:54
David Kirkby wrote:
> On Jun 7, 8:38 pm, Harry <harryooopot...(a)hotmail.com> wrote:
>> On Jun 7, 12:47 am, David Kirkby <drkir...(a)gmail.com> wrote:
>>
>>> I have a list of files
>> [...]
>>> and would like to remove the hyphen and all characters after them.
>> [...]
>>
>> sed -e 's/-.*//'
>
> Thank you - that is just what I wanted.

No, it's not. See what you asked for and look at the /boost/ entry.
Instead take pk's suggestion. (Or are there new requirements now?)

Janis

>
> Dave
From: Fostytou - AKA FrostFace on 21 Jun 2010 16:03
On Jun 7, 2:47 am, David Kirkby <drkir...(a)gmail.com> wrote:
> I think 'sed' is the tool for this, though I may be wrong.
>
> I have a list of files
>
> atlas-3.8.3.p12.spkg
> blas-20070724.spkg
> boehm_gc-7.1.p5.spkg
> boost-cropped-1.34.1.spkg
> cddlib-094f.p6.spkg
> cephes-2.8.spkg
> cliquer-1.2.p5.spkg
> conway_polynomials-0.2.spkg
> cvxopt-0.9.p8.spkg
> cython-0.12.1.spkg
> deps
> docutils-0.5.p0.spkg
> ecl-10.2.1.spkg
> eclib-20080310.p10.spkg
>
> and would like to remove the hyphen and all characters after them. So
> I get
>
> atlas
> blas
> boehm_gc
> boost-cropped
> cddlib
> cephes
> cliquer
> conway_polynomials
>
> etc
>
> What's the best way to do this?
>
> I note 'deps' has no hypen, but I think that is the only such case and
> can be handled manually if need be. There's about 100 of these, so
> whilst doing them manually is not impossible, it's a bit tedious.
>
> Note I actually want to remove the hyphen, so the subject line is
> slightly inaccurate, but any attempt I could think of to rewrite the
> subject line in a more accurate form just got too wordy. In any case,
> I know how to remove a hyphen easily.
>
> Dave

You could also use awk pretty efficiently:

awk 'BEGIN {FS=OFS="-"} {print $1}' [YOURFILELIST]
From: Ed Morton on 21 Jun 2010 16:54
On Jun 21, 3:03 pm, Fostytou - AKA FrostFace <fosty...(a)gmail.com>
wrote:
> On Jun 7, 2:47 am, David Kirkby <drkir...(a)gmail.com> wrote:
>
>
>
>
>
> > I think 'sed' is the tool for this, though I may be wrong.
>
> > I have a list of files
>
> > atlas-3.8.3.p12.spkg
> > blas-20070724.spkg
> > boehm_gc-7.1.p5.spkg
> > boost-cropped-1.34.1.spkg
> > cddlib-094f.p6.spkg
> > cephes-2.8.spkg
> > cliquer-1.2.p5.spkg
> > conway_polynomials-0.2.spkg
> > cvxopt-0.9.p8.spkg
> > cython-0.12.1.spkg
> > deps
> > docutils-0.5.p0.spkg
> > ecl-10.2.1.spkg
> > eclib-20080310.p10.spkg
>
> > and would like to remove the hyphen and all characters after them. So
> > I get
>
> > atlas
> > blas
> > boehm_gc
> > boost-cropped
> > cddlib
> > cephes
> > cliquer
> > conway_polynomials
>
> > etc
>
> > What's the best way to do this?
>
> > I note 'deps' has no hypen, but I think that is the only such case and
> > can be handled manually if need be. There's about 100 of these, so
> > whilst doing them manually is not impossible, it's a bit tedious.
>
> > Note I actually want to remove the hyphen, so the subject line is
> > slightly inaccurate, but any attempt I could think of to rewrite the
> > subject line in a more accurate form just got too wordy. In any case,
> > I know how to remove a hyphen easily.
>
> > Dave
>
> You could also use awk pretty efficiently:
>
> awk 'BEGIN {FS=OFS="-"} {print $1}' [YOURFILELIST]- Hide quoted text -
>
> - Show quoted text -

No need to assign OFS if you're only printing 1 field:

awk -F- '{print $1}' files

Ed.
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