Some nested data structure
Q
Assume that $ref refers to a scalar, an array, a hash or to some nested data structure. Explain the following statements:
✍: Guest
A
- $$ref; # returns the scalar pointed by $ref. $$ref[0]; # returns the first element of the array pointed by $ref.
- $ref->[0]; # returns the first element of the array pointed by $ref.
- @$ref; # returns the contents of the array, (or number of elements of the array in scalar context) pointed by $ref. $&$ref; # returns the last index in the array pointed by $ref.
- $ref->[0][5]; # returns the sixth element in the first row of the array pointed by $ref.
- @{$ref->{key}} # returns the contents of the array stored as the value of the key "key" in the associated array pointed by $ref.
2007-11-21, 6342👍, 0💬
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