From: "Bart Schaefer" <schaefer@brasslantern.com>
To: Sven Wischnowsky <wischnow@informatik.hu-berlin.de>,
zsh-workers@math.gatech.edu
Subject: Re: Problem with associative arrays
Date: Mon, 14 Dec 1998 07:47:47 -0800 [thread overview]
Message-ID: <981214074747.ZM21619@candle.brasslantern.com> (raw)
In-Reply-To: <199812141055.LAA07255@beta.informatik.hu-berlin.de>
On Dec 14, 11:55am, Sven Wischnowsky wrote:
} Subject: Problem with associative arrays
}
} Subscripts for associative arrays are matheval()ed
No, they are not. The code in params.c looks like
if (PM_TYPE(v->pm->flags) == PM_HASHED) {
...
} else
if (!(r = mathevalarg(s, &s)) || (isset(KSHARRAYS) && r >= 0))
...
} which makes some problems:
}
} % set -A a
You have to use `typeset -A a` to get an associative array. `set -A a`
creates an ordinary array. I realize this is confusing, which is why I
originally used a different option letter for typeset, but compatibility
with ksh requires -A.
} % a[foo]=bar
} % echo $a[baz]
} bar
}
} There is no variable baz, so evaluating it yields zero and since
} numeric subscripts on associative arrays work, this yields the `first'
} value.
This is all accurate, for ordinary arrays.
--
Bart Schaefer Brass Lantern Enterprises
http://www.well.com/user/barts http://www.brasslantern.com
next prev parent reply other threads:[~1998-12-14 15:51 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
1998-12-14 10:55 Sven Wischnowsky
1998-12-14 15:47 ` Bart Schaefer [this message]
1998-12-15 8:12 Sven Wischnowsky
1998-12-16 14:31 Sven Wischnowsky
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