pad numbers

pad numbers

[fREW Schmidt]

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Hello friends!

I have a problem that I am sure numerous people have faced before, but I
couldn't find a lot of help for on Google.  I have a bunch of files named
like this:
01
02
03
...
10
11
12
...
101
102
103

How can I easily rename all the files so that they will be like this:
001
002
003
...
010
011
012
...
101
102
103 ( hundreds stay the same)


Thanks for any tips.
-- 

-fREW

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Re: pad numbers

[Wayne Davison]

One way to 0-pad the numbers 01..99 without touching the 100..NNN files
is to use zmv:

autoload zmv
noglob zmv -W ?? 0??

I like the zmv -W command so much I make it simpler by having this in
my .zshrc:

autoload zmv
alias mmv='noglob zmv -W'

That way I can do the above will this trivial command:

mmv ?? 0??

..wayne..

Re: pad numbers

[fREW Schmidt]

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Ah shoot, I forgot to mention that the files are actually named like this
01 - foo bar.baz

maybe
noglob zmv -W ??\ (*) 0??\ \1

?

-- 

-fREW

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Re: pad numbers

[Mikael Magnusson]

2008/11/15 fREW Schmidt <frioux@gmail.com>:
> Ah shoot, I forgot to mention that the files are actually named like this
> 01 - foo bar.baz
>
> maybe
> noglob zmv -W ??\ (*) 0??\ \1

The point of -W is you can do
noglob zmv -W ??\ * 0??\ *

-- 
Mikael Magnusson

Re: pad numbers

[fREW Schmidt]

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On Sat, Nov 15, 2008 at 12:40 PM, Mikael Magnusson <mikachu@gmail.com>wrote:

> 2008/11/15 fREW Schmidt <frioux@gmail.com>:
> > Ah shoot, I forgot to mention that the files are actually named like this
> > 01 - foo bar.baz
> >
> > maybe
> > noglob zmv -W ??\ (*) 0??\ \1
>
> The point of -W is you can do
> noglob zmv -W ??\ * 0??\ *
>


Oh man, that's so cool!  (It worked great)

-fREW

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Re: pad numbers

[Phil Pennock]

On 2008-11-15 at 12:36 -0600, fREW Schmidt wrote:
> Ah shoot, I forgot to mention that the files are actually named like this
> 01 - foo bar.baz

If you want to specify the length more manually than the simple method:

% mkdir T && cd T
% touch '01 - Foo' '02 - Bar' '03 - Baz' '100 - Fred' '2000 - Long'

naive:
% zmv '([[:digit:]]##)(*)' '${(l:3::0:)1}$2'
% ls
000 - Long 001 - Foo  002 - Bar  003 - Baz  100 - Fred

Note that this has truncated the 2000 entry because I have explicitly
specified that $1 should be fit within a field three characters wide,
left-padded with digit 0.  See zshexpn(1), Parameter Expansion Flags.

Recreating the original files, then:
% zmv '([[:digit:]]|[[:digit:]][[:digit:]])([^[:digit:]]*)' '${(l:3::0:)1}$2'
% ls
001 - Foo   002 - Bar   003 - Baz   100 - Fred  2000 - Long

You might prefer [0-9] to [[:digit:]].

Perhaps you prefer the zmv -W approach.  ;-)

-Phil

Re: pad numbers

[Stephane Chazelas]

On Sat, Nov 15, 2008 at 11:04:25AM -0800, Phil Pennock wrote:
[...]
> Recreating the original files, then:
> % zmv '([[:digit:]]|[[:digit:]][[:digit:]])([^[:digit:]]*)' '${(l:3::0:)1}$2'
> % ls
> 001 - Foo   002 - Bar   003 - Baz   100 - Fred  2000 - Long

Or:

zmv -n '(<0-999>)(*)' '${(l:3::0:)1}$2'

Which BTW changes "00002 - X" to "002 - X".

-- 
Stéphane