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You can think of it as an "upgrading" operation for a boolean variable.

Like if a variable contains a Perl boolean, you can upgrade it to a JSON boolean:

$var ?= JSON::PP::true : JSON::PP::false;

Or you can upgrade a Perl boolean to some HTML:

my $is_ready = 1; $is_ready = 0 if $service->not_configured(); $is_ready = 0 if $service->payment->status() ne 'paid'; $is_ready ?= '<span class="green">yes</span>' : '<span class="red">no< +/span>'; print "<p>Service ready? $is_ready</p>";

In reply to Re: RFC: "assignary" operator ?= : by tobyink
in thread RFC: "assignary" operator ?= : by richard.sharpe

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