Beefy Boxes and Bandwidth Generously Provided by pair Networks
P is for Practical
 
PerlMonks  

Re: wantarray alternative (helper)

by tye (Cardinal)
on Jul 10, 2013 at 20:10 UTC ( #1043549=note: print w/ replies, xml ) Need Help??


in reply to wantarray alternative

sub context { wantarray ? @_ : $_[0] } sub whatever { return context( map { ... } @_ ); }

- tye        


Comment on Re: wantarray alternative (helper)
Download Code
Re^2: wantarray alternative (helper)
by tqisjim (Beadle) on Jul 10, 2013 at 20:38 UTC

    This works, but why isn't this function built in somewhere? It seems most responders assume that this is perl's default behavior.

      Because that function is trivial to write and it isn't the only or even the obviously right choice.

      sub first_or_all { wantarray ? @_ : $_[0] } sub last_or_all { wantarray ? @_ : $_[-1] } sub list_or_aref { wantarray ? @_ : \@_ } sub aref_or_list { wantarray ? @{$_[0]} : $_[0] } sub pairs_or_href { wantarray ? @_ : {@_} } sub href_or_pairs { wantarray ? %{$_[0]} : $_[0] } sub all_or_concat { wantarray ? @_ : join $,, @_ } sub all_or_die { return @_ if wantarray; return $_[0] if @_ <= 1; require Carp; local $Carp::level = 2; my $sub = ( caller(1) )[3]; Carp::croak( "Don't call $sub() like that in a scalar context" ); }

      (to list just a few off the top of my head that I've heard people argue are wise choices)

      - tye        

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://1043549]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others scrutinizing the Monastery: (11)
As of 2014-10-31 09:14 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    For retirement, I am banking on:










    Results (215 votes), past polls