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Re: Lack of documentation about mapfile callback


From: Chet Ramey
Subject: Re: Lack of documentation about mapfile callback
Date: Sat, 8 Feb 2020 22:57:13 -0500
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:68.0) Gecko/20100101 Thunderbird/68.4.1

On 2/8/20 9:04 PM, Léa Gris wrote:
> man bash.1
>> When callback is evaluated, it is supplied the index of the next 
>> array element to be assigned and the line to be assigned to that 
>> element as additional arguments. callback is evaluated after the
>> line is read but before the array element is assigned.
> 
> I can not find real-life implementation example of the mapfile callback
> that fit the implied scenario of this behavior of invoking the callback
> before the last array entry is assigned.

The mapfile builtin originally came in to support the bash debugger; I
assume that is a good enough example.

-- 
``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU    address@hidden    http://tiswww.cwru.edu/~chet/



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