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Subject: Re: bash script problem ?
Date: Thu, 17 Mar 2016 11:00:14 -0000 (UTC)
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On Wed, 16 Mar 2016 17:08:56 +0000, William Unruh wrote:

> On 2016-03-16, no.top.post@gmail.com <no.top.post@gmail.com> wrote:
>> In article <>, Teemu Likonen <tlikonen@iki.fi> wrote:
>>
>>
>>> rich@example.invalid [2016-03-10 15:22:57Z] wrote:
>>> 
>>> > Step 1, don't use the legacy sh backtick substitution syntax for
>>> > this (because it cannot nest).  Use Bash's $() substitution instead
>>> > (because it can nest).
>>> 
>>> I agree that $() is better but ``'s can nest:=20
>>> 
>>>     $ echo Year: `date \`echo +%Y\``
>>>     Year: 2016
>>> 
>> That's spooky ! Who <associated> +%Y with "2016" ?
> 
> The command "date" did. This says to run the date command with the
> argument being the output of the echo command. In this case the latter
> as +%Y so this is running
> date +%Y
> which is the year in which the date command was run. The ouput is then
> the argument to the outter echo command.
> 
> 
>> Lets have some examples of nesting, without extra spooky-stuf.
> 
> extra spooky-stuf?
> man date
> 
> 
date `echo +%Y` == 2016
echo  `date \`echo +%M\`` == 33
echo  `date \`echo +%D\`` == 03/17/16
date `echo +%M` == 35
date `echo +%D` == 03/17/16

There's nesting: lisp; & there's concatenation/piping;
but this is a load of ad-hoc crap!


BTW `wily` is great for this.
No need to touch the kybrd.