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Re: BUG?: (or what's going on?) test for NL == NL fails (bash-4.3.39(3)-release)

From Linda Walsh <bash@tlinx.org>
Newsgroups gnu.bash.bug
Subject Re: BUG?: (or what's going on?) test for NL == NL fails (bash-4.3.39(3)-release)
Date 2015-08-02 15:11 -0700
Message-ID <mailman.7771.1438553489.904.bug-bash@gnu.org> (permalink)
References <55BE6FB8.4080200@tlinx.org> <55BE759D.8030700@gmail.com>

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Charles Daffern wrote:
> On 02/08/15 20:30, Linda Walsh wrote:
>>>  if [[ $(printf "\n") == $'\n' ]]; then echo T; else echo F; fi
>> F
> 
> The command substitution operators ($(...) and `...`) strip all trailing
> linefeeds. You are left with an empty string here.
> 
> The usual workarounds I see (where necessary) are hacks like this:
> 
> variable=$(command; echo x); variable=${variable%?x}
----
	I see what you mean --- erk...
I think the process substitution doesn't, since you need
to explicitly use a -t switch if you want to strip the "\n"'s off

Thanks!


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Re: BUG?: (or what's going on?) test for NL == NL fails (bash-4.3.39(3)-release) Linda Walsh <bash@tlinx.org> - 2015-08-02 15:11 -0700

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