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Four annoying warnings

by tobyink (Abbot)
on Dec 09, 2012 at 00:05 UTC ( #1007936=perlmeditation: print w/ replies, xml ) Need Help??

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  1. or download this
    my $price = sprintf "%d.%02d", $pounds||0, $pence||0;
    
  2. or download this
    my $price = sprintf "%d.%02d", $pounds, $pence;
    
  3. or download this
    print 'a' + 'b', $/;    # warns
    print []  + {},  $/;    # no warning
    
  4. or download this
    use v5.12;   # behaviour of split changed in 5.12.
    sub a { split //, 'xyz'; 1 }  a();  # warns
    sub b { split //, 'xyz' }  b(); 1;  # no warning
    
  5. or download this
    no warnings 'numeric';
    no warnings 'once';
    no warnings 'uninitialized';
    no warnings 'void';
    

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