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Re: [Help-bash] The best way to get the last element of $@
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From: |
Eric Blake |
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Subject: |
Re: [Help-bash] The best way to get the last element of $@ |
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Date: |
Thu, 19 Mar 2015 11:02:29 -0600 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.5.0 |
On 03/19/2015 10:58 AM, Eric Blake wrote:
> On 03/19/2015 10:49 AM, Peng Yu wrote:
>> Hi,
>>
>> There are many ways of getting the last element of address@hidden Does
>> anybody
>> know what might be the best way to get the last element of address@hidden
>> Thanks.
>
> Here's one way that requires no subshells (yes, it uses eval, but this
> is one case where we are safe from eval doing anything evil):
>
> # set $last to the last member of $@
> eval printf -v last %s "address@hidden"
Although if address@hidden can be 0 (no arguments), then you'll need to add code
to special case that (unless you don't mind $last being set to $0, even
though $0 is not part of $@).
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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