optionalValue ?? valueIfNil
Which more or less translates to: "The value of optionalValue unless it isn't defined, in which case default to valueIfNil"
Usually this would be written as:
(optionalValue != nil) ? optionalValue! : valueIfNil;
I liked what I saw & looked into it and to my surprise it also exists in perl as the Null Coalescing Operator / Logical Defined-Or operator.
In perl the above example is rewritten as:
$optional_value // $value_if_null
Which is in turn shorthand for:
defined($optional_value) ? $optional_value : $value_if_null
However there is more - because in perl there is a shorthand notation for this:
$optional_value //= $value_if_null
Which is the equivalent of:
$optional_value = $optional_value // $value_if_null