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Re: (z) expansion flag do not always return an array
❦ 29 November 2021 11:50 -05, Lawrence Velázquez:
>> The (z) expansion flag is documented to return an array
>
> Is it? The 5.8 man page does not mention "array" even once.
>
> z Split the result of the expansion into words using shell
> parsing to find the words, i.e. taking into account any
> quoting in the value. Comments are not treated specially but
> as ordinary strings, similar to interactive shells with the
> INTERACTIVE_COMMENTS option unset (however, see the Z flag
> below for related options)
>
> Note that this is done very late, even later than the `(s)'
> flag. So to access single words in the result use nested
> expansions as in `${${(z)foo}[2]}'. Likewise, to remove the
> quotes in the resulting words use `${(Q)${(z)foo}}'.
When I read "split", I read "into an array". I must miss something.
Also, it works when there is something to split, but not when there is
only one word.
--
Don't use conditional branches as a substitute for a logical expression.
- The Elements of Programming Style (Kernighan & Plauger)
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