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Re: RFC: "assignary" operator ?= :

by tobyink (Canon)
on Dec 08, 2019 at 21:47 UTC ( [id://11109858]=note: print w/replies, xml ) Need Help??


in reply to RFC: "assignary" operator ?= :

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;

[download]

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>";

[download]
toby döt ink

Replies are listed 'Best First'.
Re^2: RFC: "assignary" operator ?= :
by Anonymous Monk on Dec 09, 2019 at 02:18 UTC

    convoluted? contrived? dilluted? word? ... unconvincing example 

    my $is_ready = 1;
$is_ready = 0 if $service->not_configured();
$is_ready = 0 if $service->payment->status() ne 'paid';



$is_ready 
or print "<p>Service ready? <span class="red">no</span></p>";

$is_ready 
and print gettext('yes ready');

    [download]
[reply]
[d/l]

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