Timeline for How to determine if a bash variable is empty?
Current License: CC BY-SA 3.0
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| Dec 9, 2011 at 19:15 | comment | added | James Sneeringer |
There's a comment about the alternative to -z at pubs.opengroup.org/onlinepubs/009695399/utilities/test.html. Basically, it isn't meant to be an alternative to -z. Rather, it handles cases where $foo could expand to something beginning with a metacharacter that [ or test would be confused by. Putting an arbitrary non-metacharacter at the beginning eliminates that possibility.
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| Oct 20, 2011 at 3:58 | history | answered | curious_prism | CC BY-SA 3.0 |