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Re: for i[1] in ...

From: Chet Ramey
Subject: Re: for i[1] in ...
Date: Mon, 26 Nov 2001 12:35:52 -0500

> $ m=(a b c);echo address@hidden
> a b c
> $ export m=(a b c);echo address@hidden
> (a b c) b c

It's sort of a congruence of features.

Since you can't export arrays, export doesn't understand the compound
assignment syntax.  export treats the above as assigning the string
`(a b c)' to the variable `m'. 

Assigning to a variable that is already an array without a subscript
is the same as assigning to element 0.

This is, I agree, less consistent than it could (should) be.

> 0bin$ export p=(a b c);echo address@hidden
> (a b c)

This actually does the same thing, appearances aside.  `p' is actually
a variable whose value is `(a b c)'.  The ability to understand array
notation for non-array variables was added for ksh93 compatibility some
time ago.

> $ set -v
> $ z=w
> z=w
> $ m=(1 v)
> m=(1 v)
> 1 v
> odd, 2 lines not one.

It's an artifact of the implementation.  I'll fix it.  Thanks.


``The lyf so short, the craft so long to lerne.'' - Chaucer
( ``Discere est Dolere'' -- chet)

Chet Ramey, CWRU    address@hidden    http://cnswww.cns.cwru.edu/~chet/

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