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Re: shift implicit dereference

by LanX (Canon)
on Oct 06, 2013 at 13:39 UTC ( #1057148=note: print w/ replies, xml ) Need Help??

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  1. or download this
      DB<122> $a
     => 5
    ...
    
      DB<125> $a
     => 7
    
  2. or download this
      DB<126> sub ref_add { ${ shift() }+=2 }
    
    ...
    
      DB<131> $a
     => 11
    
  3. or download this
      DB<102> $a=11
     => 11
    ...
    
      DB<104> ref_add3 \$a; $a
     => 13
    
  4. or download this
           Any arguments passed in show up in the array @_.  Therefore, if
    + you
           called a function with two arguments, those would be stored in 
    +$_[0]
    ...
           for the actual scalar parameters.  In particular, if an element
    + $_[0]
           is updated, the corresponding argument is updated (or an error 
    +occurs
           if it is not updatable). 
    

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