Re: Useful uses of redo?

Input validation is an excellent place.

my %is_legal = map { $_ => 1 } qw(
    y yes n no
);

my $answer;
{
    print "What is your answer? ";
    chomp( $answer = <> );
    $answer = lc $answer;
    last if $is_legal{ $answer };
    redo;
}

# Do something with $answer, which is now guaranteed to be 'y', 'yes',
+ 'n', or 'no'
[download]

------
We are the carpenters and bricklayers of the Information Age.

Then there are Damian modules.... *sigh* ... that's not about being less-lazy -- that's about being on some really good drugs -- you know, there is no spoon. - flyingmoose

I shouldn't have to say this, but any code, unless otherwise stated, is untested

Comment on Re: Useful uses of redo? Download Code

Replies are listed 'Best First'.
Re^2: Useful uses of redo? by belg4mit (Prior) on Aug 27, 2004 at 04:40 UTC
Hmm, I always use `until()` for that, since the test fails on a null value you enter the loop. `-- I'm not belgian but I play one on TV.`	[reply]