zsh-users
 help / color / mirror / Atom feed
* zip arrays exclude empty elements
@ 2020-09-04 22:03 sergio
  2020-09-06  0:21 ` Bart Schaefer
  0 siblings, 1 reply; 2+ messages in thread
From: sergio @ 2020-09-04 22:03 UTC (permalink / raw)
  To: zsh-users


I have an input string in form of 'A[-][B]' that I'd like to translate 
as follows:

1: A-B    ->  -a A -b B
2: A-     ->  -a A
3: A      ->  -a A
4: -B     ->  -b B
5: empty  ->  empty

The solution I found:
tmp=("${(@s.-.)crop}")
echo ${tmp[1]:+-a $tmp[1]} ${tmp[2]:+-b $tmp[2]}


But possible there is clearer and simpler solution, like

o=(-a -b)
echo ${o:^tmp}

or even
echo ${(-a -b):^${(@s.-.)crop}}


-- 
sergio.


^ permalink raw reply	[flat|nested] 2+ messages in thread

* Re: zip arrays exclude empty elements
  2020-09-04 22:03 zip arrays exclude empty elements sergio
@ 2020-09-06  0:21 ` Bart Schaefer
  0 siblings, 0 replies; 2+ messages in thread
From: Bart Schaefer @ 2020-09-06  0:21 UTC (permalink / raw)
  To: sergio; +Cc: Zsh Users

On Fri, Sep 4, 2020 at 3:03 PM sergio <sergio@outerface.net> wrote:
>
> I have an input string in form of 'A[-][B]' that I'd like to translate

I'm not sure if you consider the following to be simpler, but it
doesn't rely on exactly two letters in the split string:

setopt extendedglob
print -r -- ${=${(@s.-.)crop}/(#b)(?)/-${(L)match[1]} ${match[1]}}

Remove the "=" if you want e.g. "-a A" instead of "-a" and "A" as
separate words.


^ permalink raw reply	[flat|nested] 2+ messages in thread

end of thread, other threads:[~2020-09-06  0:22 UTC | newest]

Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-09-04 22:03 zip arrays exclude empty elements sergio
2020-09-06  0:21 ` Bart Schaefer

zsh-users

This inbox may be cloned and mirrored by anyone:

	git clone --mirror http://inbox.vuxu.org/zsh-users

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V1 zsh-users zsh-users/ http://inbox.vuxu.org/zsh-users \
		zsh-users@zsh.org
	public-inbox-index zsh-users

Example config snippet for mirrors.
Newsgroup available over NNTP:
	nntp://inbox.vuxu.org/vuxu.archive.zsh.users


code repositories for the project(s) associated with this inbox:

	https://git.vuxu.org/mirror/zsh/

AGPL code for this site: git clone https://public-inbox.org/public-inbox.git