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Re: -eq and strings
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From: |
Rob la Lau |
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Subject: |
Re: -eq and strings |
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Date: |
Mon, 6 Mar 2017 15:31:31 +0100 |
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User-agent: |
Mozilla/5.0 (X11; Linux i686; rv:45.0) Gecko/20100101 Thunderbird/45.7.1 |
On 06-03-17 15:16, Reuti wrote:
> if ! expr "$x" : '[[:digit:]]*$' >/dev/null; then echo no; fi
>
> if [ -n "${x//[0-9]/}" ]; then echo no; fi
True, but regular expressions are usually considered expensive.
(Must admit I never benchmarked.)
And I know 1 regex won't considerably slow down my script, but it's
become a habit to always try and program as light as possible.
--
-- Rob la Lau
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-- Sysadmin en webdeveloper in ruste
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-- web : https://ohreally.nl/
-- eml : rob@ohreally.nl
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