Zsh Mailing List Archive Messages sorted by: Reverse Date, Date, Thread, Author

Re: test if a parameter is numeric

X-seq: zsh-users 11207
From: Andrew Ruder <andy@xxxxxxxxxxx>
To: zsh-users@xxxxxxxxxx
Subject: Re: test if a parameter is numeric
Date: Mon, 19 Feb 2007 21:21:38 -0600
In-reply-to: <E1HJIfJ-0002Ok-Ql@xxxxxxxxxx>
Mail-followup-to: zsh-users@xxxxxxxxxx
Mailing-list: contact zsh-users-help@xxxxxxxxxx; run by ezmlm
References: <Xns98D2ADD16C100zzappergmailcom@xxxxxxxxxxx> <070209182939.ZM18654@xxxxxxxxxxxxxxxxxxxxxx> <003d01c74d3f$3bbd7960$6600000a@venti> <E1HG3Bl-0007Ge-DM@xxxxxxxxxx> <E1HJIfJ-0002Ok-Ql@xxxxxxxxxx>

On Tue, Feb 20, 2007 at 12:14:55AM +0000, Lydgate wrote:
> Sorry maybe I'm missing something, but if you need to match more than
> one digit, what's wrong with:
> 
> [[ "$1" == [0-9][0-9]* ]]

Lydgate,

shell script expressions != regex expressions.  The expression up there
would match:

00
01
02
03abc

but not:

1
2
3

However, I will give you that your expression would work fine in a regex
engine...

There is a ZSH extension that would have more of the effect you are
looking for but its as unportable as most other solutions,
unfortunately.

- Andy

-- 
Andrew Ruder <andy@xxxxxxxxxxx>
http://www.aeruder.net

References:
- test if a parameter is numeric
  - From: zzapper
- Re: test if a parameter is numeric
  - From: Bart Schaefer
- Re: test if a parameter is numeric
  - From: Brian K. White
- Re: test if a parameter is numeric
  - From: Lydgate

Messages sorted by: Reverse Date, Date, Thread, Author