Beefy Boxes and Bandwidth Generously Provided by pair Networks
Perl Monk, Perl Meditation

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??

I have had a difference of opinion with a colleague regarding the use of multiple return statements in a sub routine, as opposed to using nested conditionals. I'd like to hear thoughts from the rest of the community on this topic. Please consider the following subroutines: (all method and variables are fake just to illustrate the example)

sub foo { my($self) = @_; my $authentication = $self->authenticate_user(); if(! defined($authentication)){ return {status=>0, error=>"Authentication Failed", external_id=> +undef}; } my $profile = $self->get_user_profile(); if(! $profile->is_active()){ return {status=>0, error=>"User is not active", external_id=>und +ef}; } my($external_id) = $self->find_external_id($profile); if(! defined($external_id)){ $external_id = $self->send_profile_to_partner($profile); } return {status=>1, error=>undef, external_id=>$external_id}; } ### As Opposed to sub bar { my($self) = @_; my $status = 0; my $error = undef; my $external_id = undef; my $authentication = $self->authenticate_user(); if(! defined($authentication)){ $error="Authentication Failed"; }else{ my $profile = $self->get_user_profile(); if(! $profile->is_active()){ $error="User is not active"; }else{ my($external_id) = $self->find_external_id($profile); if(! defined($external_id)){ $external_id = $self->send_profile_to_partner($profile); } } } return {status=>$status, external_id=>$external_id, error=>$error}; }
Corrected a typo causeing bar to always return 0 for status.

The hash reference being returned could be defined at the beginning for either implementation, to make adding or removing values from it easier, my real question is simply regarding the style of using a return to short circuit the sub routine, and opposed to the nested if/else structures.

Which of these implementations would you prefer and why?

Thank you all in advance for sharing your input. I'm interested to hear what people think

They say that time changes things, but you actually have to change them yourself.

—Andy Warhol

In reply to Control Flow - Multiple returns or nested conditionals by JediWizard

Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":

  • Are you posting in the right place? Check out Where do I post X? to know for sure.
  • Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
    <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
  • Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
  • Want more info? How to link or or How to display code and escape characters are good places to start.
Log In?

What's my password?
Create A New User
Domain Nodelet?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others taking refuge in the Monastery: (6)
As of 2021-07-29 09:39 GMT
Find Nodes?
    Voting Booth?

    No recent polls found