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(Golf) Reversing RPN Notation

by Masem (Monsignor)
on May 21, 2001 at 18:06 UTC ( #81969=perlmeditation: print w/ replies, xml ) Need Help??

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  1. or download this
    my %priorities = {  '+' => 1,
                        '-' => 1,
                        '*' => 2,
                        '/' => 2 };
    
  2. or download this
    "2 3 4 * 5 / +"  --> 2 + 3 * 4 / 5
    "3 4 * 5 / 2 +"  --> 3 * 4 / 5 + 2
    "3 4 5 / * 2 +"  --> 3 * 4 / 5 + 2
    "2 3 + 4 * 5 /"  --> (2 + 3) * 4 / 5
    
  3. or download this
    my $o = (   ',' => 1,
                'j' => 2 );
    
    "_ just another , perl , hacker , j"  =>  
       "_ j ( just , another , perl , hacker )"
    

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