Re: When scripting, which is better?

>>>>> "Justin" == Justin Clift <justin(at)postgresql(dot)org> writes:

Justin> if [ x"$foo" = x"" ]; then

Justin> or

Justin> if [ "$op" = "" ]; then

Justin> or

Justin> if [ "$foo" ]; then

I'm not the slightest bit a shell expert, but why not :-

if [ -z "$foo" ]; then

Is this POSIX/SUS2/whatever ?

Sincerely,

Adrian Phillips

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