From: Roman Neuhauser <neuhauser@sigpipe.cz>
To: Bart Schaefer <schaefer@brasslantern.com>
Cc: zsh-users@zsh.org
Subject: Re: wrong array range with (r) flag on scalar?
Date: Thu, 5 Mar 2015 23:16:56 +0100 [thread overview]
Message-ID: <20150305221656.GH4524@isis.sigpipe.cz> (raw)
In-Reply-To: <150305084408.ZM20963@torch.brasslantern.com>
# schaefer@brasslantern.com / 2015-03-05 08:44:08 -0800:
> Would you expect
>
> torch% print $a[(r)h?,(r)wo]
> hello wo
>
> to stop at the "w"?
yes, but only *after* reading this carefully:
r Reverse subscripting: if this flag is given, the exp is taken as
a pattern and the result is the first matching array element,
substring or word (if the parameter is an array, if it is a
scalar, or if it is a scalar and the `w' flag is given, respec-
tively). The subscript used is the number of the matching ele-
ment, so that pairs of subscripts such as `$foo[(r)??,3]' and
`$foo[(r)??,(r)f*]' are possible if the parameter is not an
associative array.
note: "The subscript used is the number of the matching element".
i would definitely expect a (0-based indexing, pseudocode)
`substr foobar bar` to be 3, not 5.
> The doc could certainly be more clear about this.
oh yeah. :)
--
roman
prev parent reply other threads:[~2015-03-05 22:26 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-05 8:30 Han Pingtian
2015-03-05 16:44 ` Bart Schaefer
2015-03-05 22:16 ` Roman Neuhauser [this message]
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