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Re: Handling non-fatal method error strings without exceptions or globals?

by itub (Priest)
on Jan 19, 2005 at 16:19 UTC ( [id://423424]=note: print w/replies, xml ) Need Help??


in reply to Handling non-fatal method error strings without exceptions or globals?

Another option is to have your functions return multiple values: 
my ($result, $error) = function($arg);
if ($error) {
    # do something...
}

[download]

One caveat is that if for some reason you want to disregard the error and only want the result, you need to remember to use parentheses: 

($result) = function($arg); # get the result only
$result   = function($arg); # WRONG!!! gets the error only

[download]

Replies are listed 'Best First'.
Re^2: Handling non-fatal method error strings without exceptions or globals?
by sleepingsquirrel (Chaplain) on Jan 19, 2005 at 16:51 UTC
    Or, you could use wantarray to eliminate the caveat... 
    #!/usr/bin/perl -w

$result = fun();
print "$result\n";
($result, $error) = fun();
print "$result, $error\n";

sub fun
{
    return wantarray ? ("stuff","Error") : "stuff"
}

    [download]

    -- All code is 100% tested and functional unless otherwise noted.
[reply]
[d/l]

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