Re: path and += troubles

[Steven Klass <sklass@xxxxxxxxxxxxxxx>]

Hi,

This exposes one of my personal problems with typeset.  If I really  
want a path appended typeset -U will drop the appended path, in favor  
of the path which already exists.  So IMHO the only way to handle  
this properly is to
	
	Normalize the new path ($2) - Remove any trailing slashes ensure no  
double-slashes
	Check to see if the new path exists in the old path array ($1) and  
delete it
	Append or Prepend the new path to the $1
	
Here's some of the cleanup stuff I read about in this list..
	path=($^path(N))
	setopt EXTENDED_GLOB
	path=(${${path//\/##/\/}%/})
	unsetopt EXTENDED_GLOB
	typeset -U path

But can anyone please explain my number 1 item - that is really  
annoying me..

	appendPath() {
		# if the path exists delete it..
		deletePath $1 $2
		# Append the path to the end..
		$1+=($2)
	}

	1.  Why does += not work when adding to the array - It should right?


---

Steven Klass

sklass@xxxxxxxxxxxxxxx
(480) 988-5657

On Nov 26, 2005, at 6:25 AM, Vincent Lefevre wrote:

> On 2005-11-26 10:32:35 +0100, Christian Taylor wrote:
> > I never bothered about a deletion function, because I simply use:
> > typeset -U path
> > which will keep only the first occurence of any element.
>
> But if a same path is written in two different ways, it doesn't
> recognise it:
>
> ay:~> echo $library_path
> /home/lefevre/./lib /home/lefevre/./lib /home/lefevre/lib /usr/ 
> local/gmp/lib
> ay:~> typeset -U LIBRARY_PATH
> ay:~> echo $library_path
> /home/lefevre/./lib /home/lefevre/lib /usr/local/gmp/lib
>
> --
> Vincent Lefèvre <vincent@xxxxxxxxxx> - Web: <http://www.vinc17.org/>
> 100% accessible validated (X)HTML - Blog: <http://www.vinc17.org/ 
> blog/>
> Work: CR INRIA - computer arithmetic / SPACES project at LORIA