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

Re^2: Why no warnings for 1 in void context?

by tlm (Prior)
on Jul 17, 2005 at 12:58 UTC ( #475559=note: print w/ replies, xml ) Need Help??


in reply to Re: Why no warnings for 1 in void context?
in thread Why no warnings for 1 in void context?

Actually, the same is true of zero:

% perl -wce 0 -e syntax OK

Yes, thank you, and also of undef and (), and of any list whose elements are the scalars already identified; e.g.:

% perl -wce '( 1, 0, undef, , "di foo", "ds bar", "ig baz" )' -e syntax OK

Given dave_the_m's explanation above, is this to allow:

0 until ....
??

Reading between the lines, I gather that you are attaching some significance to the boolean value of the constant in question. I did too on a first reading, but then I realized that it is the boolean value of what follows the while or until that matters. I.e.,

1 while some_condition_with_side_effects;
has the same effect as
0 while some_condition_with_side_effects;

the lowliest monk


Comment on Re^2: Why no warnings for 1 in void context?
Select or Download Code

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://475559]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others chilling in the Monastery: (9)
As of 2015-07-04 14:58 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 (60 votes), past polls