Eyesnose

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[edit] The eyesnose operator

[edit] runscript

The eyesnose operator is used in initialization scripts using the runscript shell. It returns the first operand if it is not null, otherwise it returns the second operand.

[edit] Example

In the following example, $a will be set to the value of $b, unless $b is null. If $b is null, $a will take a value of "Zippy". 

$a = "${b:-Zippy}"
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