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jstangroome/Empty versus unset parameter expansion in bash

Created September 22, 2017 01:29
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Empty versus unset parameter expansion in bash
$ a=; unset b; echo -e "\na- => ${a-nope}\na:- => ${a:-nope}\nb- => ${b-nope}\nb:- => ${b:-nope}"
a- =>
a:- => nope
b- => nope
b:- => nope
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