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Arrays and hashes only with references

by grizzley (Chaplain)
on Mar 14, 2008 at 13:50 UTC ( #674203=perltutorial: print w/replies, xml ) Need Help??

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  1. or download this
    $arrayref = [1, 3, 5, 7];
    $hashref = {key1=>val1, key2=>val2, key3=>val3};
    
  2. or download this
    # want array element - use square brackets
    $value = $$arrayref[2];
    # want hash element - use curly brackets
    $othervalue = $$hashref{key2};
    
  3. or download this
    # array of arrays
    
    ...
    $$array_of_arrays[2].....
    # and there are 4 values in 'inner' level, so lets take last one:
    $value = $$array_of_arrays[2][3];
    
  4. or download this
    # hash of hashes
    
    ...
    $$hash_of_hashes{key22}.........
    # and end with 'inner' key
    $$hash_of_hashes{key22}{key4};
    
  5. or download this
    $monk1 = 'Jack';
    $monk2 = 'John';
    ...
    # see how it looks and where monks reside:
    use Data::Dumper;
    print Dumper $monastery;
    
  6. or download this
    # using @ in join function
    $arrayref = $$monastery{'garden'}{'plants'};
    ...
    
    # monk sitting in church -> in left nave -> in first bank -> as first
    print "Monk: ", $$monastery{'church'}{'left nave'}[0][0], "\n";
    

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