Re: [Help-bash] confused by command substitution...

[Alfred M. Szmidt]

   > I'm not understanding the difference here, or why the last example
   > works.  Anyone got a good explanation?
   > 
   > $ if "$(echo x)"; then echo foo; fi
   > bash: x: command not found
   > $ if "$(echo x > /dev/null)"; then echo foo; fi
   > bash: : command not found
   > $ if $(echo x); then echo foo; fi
   > bash: x: command not found
   > $ if $(echo x > /dev/null); then echo foo; fi
   > foo

   They're all 100% wrong.  
   
Clearly they aren't.  They are also syntatically valid according to
POSIX grammar rules from what I can see.

And please calm down, there is no need for such a overly agressive
tone.  If you find yourself using such a tone, better is to not reply
to an message, or wait a day and rewrite it.