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Re: Can I test if a parameter expansion has worked

X-seq: zsh-users 28107
From: Stephane Chazelas <stephane@xxxxxxxxxxxx>
To: zzapper <zsh@xxxxxxxxxxxxxx>
Cc: zsh-users@xxxxxxx
Subject: Re: Can I test if a parameter expansion has worked
Date: Tue, 20 Sep 2022 14:25:51 +0100
Archived-at: <https://zsh.org/users/28107>
In-reply-to: <f93d2561-a8d8-c952-2aeb-8bcf43eef1cb@rayninfo.co.uk>
List-id: <zsh-users.zsh.org>
Mail-followup-to: zzapper <zsh@xxxxxxxxxxxxxx>, zsh-users@xxxxxxx
References: <5dc8b935-f234-ca54-0ceb-50cb1da9bc29@rayninfo.co.uk> <f93d2561-a8d8-c952-2aeb-8bcf43eef1cb@rayninfo.co.uk>

2022-09-15 08:34:34 +0100, zzapper:
[...]
> if [[ $f =~ '.jpg|gif|png|jpeg' ]] ;then echo 'ok' ;else echo 'nok' ;fi
[...]

ITYM

if [[ $f =~ '\.(jpe?g|gif|png)$' ]]

Or (better as regexps can often not be used with non-text while
zsh globs can):

if [[ $f = *.(jp(e|)g|gif|png) ]]

-- 
Stephane

Follow-Ups:
- Re: Can I test if a parameter expansion has worked
  - From: Stephane Chazelas

References:
- Can I test if a parameter expansion has worked
  - From: zzapper
- Re: Can I test if a parameter expansion has worked
  - From: zzapper

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