Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.debian.user > #181142 > unrolled thread

OT: Help with sort (and maybe awk or sed)

Back to article view | Back to linux.debian.user

Contents

  OT: Help with  sort (and maybe awk or sed) rhkramer@gmail.com - 2017-05-20 15:20 +0200
    Re: OT: Help with  sort (and maybe awk or sed) Stefan Monnier <monnier@iro.umontreal.ca> - 2017-05-20 15:30 +0200
      Re: OT: Help with  sort (and maybe awk or sed) Andre Majorel <aym-naibed@teaser.fr> - 2017-05-20 21:10 +0200
      Re: OT: Help with  sort (and maybe awk or sed) rhkramer@gmail.com - 2017-05-20 21:30 +0200

#181142 — OT: Help with sort (and maybe awk or sed)

I have a need to sort lists of URLs and associated titles formatted as 
follows:

   * [[<URL1>][<Title1>]]

e.g [[http://www.google.com][Google search]]

I'd like to get a simple sort routine to do that.  

My first thought (well, actually it's probably the sixth, one of which was 
trying to get the TWiki developers to reverse the order of the fields, i.e. 
[[<Title1>][<URL1>]]) is to sort on the "field" starting with "]".

I don't see a way to set such a delimiter for a field in man sort, so I think I 
need something like awk or sed (or some other program) in addition to sort.

My sed or awk skills aren't up to doing something like that, so any help would 
be appreciated.

I will use the sort in a variety of  (that can invoke command line commands) 
which include nedit, kate, and any of a number of Scintilla based editor.  (It 
does not include vi, vim, or emacs.)

Thanks!
Randy Kramer

[toc] | [next] | [standalone]

#181143

> I have a need to sort lists of URLs and associated titles formatted as 
> follows:
>
>    * [[<URL1>][<Title1>]]
>
> e.g [[http://www.google.com][Google search]]
>
> I'd like to get a simple sort routine to do that.  

In my quick test,

    sort -t '[' -k 4

seemed to do the trick,


        Stefan

[toc] | [prev] | [next] | [standalone]

#181157

On 2017-05-20 09:19 -0400, Stefan Monnier wrote:
> > I have a need to sort lists of URLs and associated titles formatted as 
> > follows:
> >
> >    * [[<URL1>][<Title1>]]
> >
> > e.g [[http://www.google.com][Google search]]
> >
> > I'd like to get a simple sort routine to do that.  
> 
> In my quick test,
> 
>     sort -t '[' -k 4
> 
> seemed to do the trick,

Another approach is to convert the list to something more
"normal", say two fields separated by a tab, process it with the
usual tools and convert it back.

perl -n -e 'BEGIN { $l = "\\["; $r = "\\]"; $nonr = "[^[]" }
  /^$l$l($nonr*)$r$l($nonr*)$r$r$/ or die "malformed line";
  die "URL contains a tab" if $1 =~ /\t/;
  die "description contains a tab" if $2 =~ /\t/;
  print "$1\t$2\n";'

This script also catches malformed or ambiguous input but relies
on no tabs in the input.

If you trust the input to be correct and free of corner cases
like embedded "]" and all you want is to sort it, Stefan's
approach is fine, I would think.

-- 
André Majorel <http://www.teaser.fr/~amajorel/>
Ever got spam through an address harvested from lists.debian.org ?
Neither have I.

[toc] | [prev] | [next] | [standalone]

#181158

On Saturday, May 20, 2017 09:19:07 AM Stefan Monnier wrote:
> > I have a need to sort lists of URLs and associated titles formatted as
> > 
> > follows:
> >    * [[<URL1>][<Title1>]]
> > 
> > e.g [[http://www.google.com][Google search]]
> > 
> > I'd like to get a simple sort routine to do that.
> 
> In my quick test,
> 
>     sort -t '[' -k 4
> 
> seemed to do the trick,

Thanks!  Two wows!

   1. Wow, thanks (again)!

   2.  Wow, how did I miss the -t option when I read (well, I suppose, 
skimmed) man sort this morning.  I must have been asleep!

regards,
Randy Kramer

[toc] | [prev] | [standalone]

Back to top | Article view | linux.debian.user

csiph-web