perl object method refer use string

Question

perl object "plan" has subroutine "plan_exec_time";

my $p = Plan->new;

i can call it by this way : $p->plan_exec_time

but $p->"plan_exec_time" dos not works.

now i want access the subroutine by variable refer:

my $t = "plan_exec_";

$p->"${t}time"

this is also not works

how to access the object's subroutine but donot through create an temp variable ?

because this works :

my $x = "${t}time";
$p->$x;

Can you show what error message you are getting when calling this function? — Krishnachandra Sharma
– Krishnachandra Sharma, Commented Jan 28, 2013 at 8:10
Check the path of the Plan module. Like this: perl -e Plan.pm — Krishnachandra Sharma
– Krishnachandra Sharma, Commented Jan 28, 2013 at 8:11

ikegami · Accepted Answer · 2013-01-28 08:21:57Z

3

my $t = "plan_exec";
$p->can($t."_time")->($p)

The can method returns ref to the method.

edited Jan 28, 2013 at 8:21

answered Jan 28, 2013 at 8:00

ikegami

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1 Comment

dove Over a year ago

some explanation would help the OP

Borodin · Accepted Answer · 2013-01-28 09:06:41Z

0

I don't understand why you would want to avoid using a temporary variable - any other solution will be ugly and hacky. But you can reference and dereference a string in one go, like this

my $p = Plan->new;
my $t = "plan_exec_";
$p->${\"${t}time"};

answered Jan 28, 2013 at 9:06

Borodin

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