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From: Felipe Contreras <felipe.contreras@gmail.com>
To: Zsh Users <zsh-users@zsh.org>
Subject: Temporary variable compatibility
Date: Tue, 21 Mar 2023 18:21:14 -0600	[thread overview]
Message-ID: <CAMP44s0qQ3yOD6a4cpg-RVOOrjKfHL6ZyaTry4xys9eQ9cD7tA@mail.gmail.com> (raw)

Hi,

I found a discrepancy between different shells:

  f() { echo $var; }
  var=1 f
  test -z "${var-}"

Both zsh, bash, and dash set the variable temporarily, but ksh does not.

In zsh the emulation of ksh and sh both keep the variable assignment.

Is this the POSIX standard? If so, then how should one temporarily set
a variable? A subshell?

Cheers.

-- 
Felipe Contreras


             reply	other threads:[~2023-03-22  0:22 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-03-22  0:21 Felipe Contreras [this message]
2023-03-22  1:03 ` Lawrence Velázquez

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