'for' sorted?

'for' sorted?

[Ray Andrews]

     for var in /dev/sd*; do
     ...

Apart from capturing the output and then sorting it, is is possible for 
'for' to go thru the input in a sorted way?  I doubt it but she moves in 
mysterious ways so it might just be doable.

Re: 'for' sorted?

[Jérémie Roquet]

Hi,

Le jeu. 22 sept. 2022 à 17:20, Ray Andrews <rayandrews@eastlink.ca> a écrit :
>      for var in /dev/sd*; do
>      ...
>
> Apart from capturing the output and then sorting it, is is possible for
> 'for' to go thru the input in a sorted way?  I doubt it but she moves in
> mysterious ways so it might just be doable.

Lexical order:

  for var in /dev/sd*(on); do

To see the available sort specifiers, use:

    for var in /dev/sd*(o<tab>

Best regards,

-- 
Jérémie

Re: 'for' sorted?

[Ray Andrews]

On 2022-09-22 08:26, Jérémie Roquet wrote:
>
> Lexical order:
>
>    for var in /dev/sd*(on); do
>
> To see the available sort specifiers, use:
>
>      for var in /dev/sd*(o<tab>
>
> Best regards,
>
Bloody marvelous, <tab> there to give you your options, I had no idea 
there was any such thing.

    9 /aWorking/Zsh/Source/Wk 1 $ for aa in /dev/sda*(on); do echo $aa; done
    /dev/sda
    /dev/sda1
    /dev/sda10
    /dev/sda11
    /dev/sda12
    /dev/sda13
    /dev/sda2
    /dev/sda3
    /dev/sda4
    /dev/sda5
    /dev/sda6
    /dev/sda7
    /dev/sda8
    /dev/sda9

Now, what would be idyllic is to be able to have version sort so that 
the output is this:

    /dev/sda
    /dev/sda1
    /dev/sda2
    /dev/sda3
    /dev/sda4
    /dev/sda5
    /dev/sda6
    /dev/sda7
    /dev/sda8
    /dev/sda9
    /dev/sda10
    /dev/sda11
    /dev/sda12
    /dev/sda13


Thanks Jérémie

Re: 'for' sorted?

[Mikael Magnusson]

On 9/22/22, Ray Andrews <rayandrews@eastlink.ca> wrote:
> On 2022-09-22 08:26, Jérémie Roquet wrote:
>>
>> Lexical order:
>>
>>    for var in /dev/sd*(on); do
>>
>> To see the available sort specifiers, use:
>>
>>      for var in /dev/sd*(o<tab>
>>
>> Best regards,
>>
> Bloody marvelous, <tab> there to give you your options, I had no idea
> there was any such thing.
>
>     9 /aWorking/Zsh/Source/Wk 1 $ for aa in /dev/sda*(on); do echo $aa;
> done
>     /dev/sda
>     /dev/sda1
>     /dev/sda10
>     /dev/sda11
>     /dev/sda12
>     /dev/sda13
>     /dev/sda2
>     /dev/sda3
>     /dev/sda4
>     /dev/sda5
>     /dev/sda6
>     /dev/sda7
>     /dev/sda8
>     /dev/sda9
>
> Now, what would be idyllic is to be able to have version sort so that
> the output is this:
>
>     /dev/sda
>     /dev/sda1
>     /dev/sda2
>     /dev/sda3
>     /dev/sda4
>     /dev/sda5
>     /dev/sda6
>     /dev/sda7
>     /dev/sda8
>     /dev/sda9
>     /dev/sda10
>     /dev/sda11
>     /dev/sda12
>     /dev/sda13

You can use the n glob qualifier for this. (distinct from the n option
to the o glob qualifier). eg, *(non)

-- 
Mikael Magnusson

Re: 'for' sorted?

[Andreas Kusalananda Kähäri]

On Thu, Sep 22, 2022 at 08:54:58AM -0700, Ray Andrews wrote:
> On 2022-09-22 08:26, Jérémie Roquet wrote:
> >
> > Lexical order:
> >
> >    for var in /dev/sd*(on); do
> >
> > To see the available sort specifiers, use:
> >
> >      for var in /dev/sd*(o<tab>
> >
> > Best regards,
> >
> Bloody marvelous, <tab> there to give you your options, I had no idea 
> there was any such thing.
> 
>     9 /aWorking/Zsh/Source/Wk 1 $ for aa in /dev/sda*(on); do echo $aa; done
>     /dev/sda
>     /dev/sda1
>     /dev/sda10
>     /dev/sda11
>     /dev/sda12
>     /dev/sda13
>     /dev/sda2
>     /dev/sda3
>     /dev/sda4
>     /dev/sda5
>     /dev/sda6
>     /dev/sda7
>     /dev/sda8
>     /dev/sda9
> 
> Now, what would be idyllic is to be able to have version sort so that 
> the output is this:
> 
>     /dev/sda
>     /dev/sda1
>     /dev/sda2
>     /dev/sda3
>     /dev/sda4
>     /dev/sda5
>     /dev/sda6
>     /dev/sda7
>     /dev/sda8
>     /dev/sda9
>     /dev/sda10
>     /dev/sda11
>     /dev/sda12
>     /dev/sda13
> 
> 
> Thanks Jérémie

The number at the end of device files are not version numbers.

To get them in numerical order instead of the default lexicographical
order, use (n) as the globbing qualifier, or set the NUMERIC_GLOB_SORT
shell option.

	print -l /dev/sda*(n)

or,

	setopt NUMERIC_GLOB_SORT
	print -l /dev/sda*


-- 
Andreas (Kusalananda) Kähäri
SciLifeLab, NBIS, ICM
Uppsala University, Sweden

.

Re: 'for' sorted?

[Ray Andrews]

On 2022-09-22 09:12, Mikael Magnusson wrote:
>
> You can use the n glob qualifier for this. (distinct from the n option
> to the o glob qualifier). eg, *(non)
>
Perfect!  You know, it amazes me that there is enough semantic real 
estate for zsh to be able to accept such a fine level of control without 
ambiguities.   I'd like to dive into it, but it would take a hundred 
hours of instruction to get me up to speed.

Re: 'for' sorted?

[Ray Andrews]

On 2022-09-22 09:17, Andreas Kusalananda Kähäri wrote:
>
> The number at the end of device files are not version numbers.

Obviously!  But version sort gives the kind of order I'm looking for.
>
>
> 	print -l /dev/sda*(n)
>
> or,
>
> 	setopt NUMERIC_GLOB_SORT
> 	print -l /dev/sda*
>
>
Thanks, that seems just as effective.