Beefy Boxes and Bandwidth Generously Provided by pair Networks
more useful options
 
PerlMonks  

Re: Perl Idioms Explained - && and || "Short Circuit" operators

by Abigail-II (Bishop)
on Oct 22, 2003 at 21:31 UTC ( #301380=note: print w/ replies, xml ) Need Help??


in reply to Perl Idioms Explained - && and || "Short Circuit" operators

--------------------------------------------------------- $this && $that | If $this is true, and $that is true | return the value of the last | expression evaluated ($that). -----------------+--------------------------------------- $this || $that | If $this evaluates true, stop | evaluating, we're done. Otherwise | evaluate $that for truthfulness. | If $that evaluates true, return | the value of $that. ---------------------------------------------------------

That doesn't explain what is returned if $that is false. May I suggest the following (which is shorter, symmetric, and explains the return value on failure).

--------------------------------------------------------- $this && $that | If $this is true, return $that, | else return $this. -----------------+--------------------------------------- $this || $that | If $this is true, return $this, | else return $that. ---------------------------------------------------------

Abigail


Comment on Re: Perl Idioms Explained - && and || "Short Circuit" operators
Select or Download Code
Re: Re: Perl Idioms Explained - && and || "Short Circuit" operators
by davido (Archbishop) on Oct 22, 2003 at 21:34 UTC
    Thanks Abigail. The node has been updated per your suggestion. Good catch.

    Dave


    "If I had my life to do over again, I'd be a plumber." -- Albert Einstein

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://301380]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others drinking their drinks and smoking their pipes about the Monastery: (14)
As of 2015-07-07 15:30 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    The top three priorities of my open tasks are (in descending order of likelihood to be worked on) ...









    Results (90 votes), past polls