The differences between slicing and indexing are very minor.

Array Indexing
--------------
SCALAR = $array[SCALAR EXPR];
$value = $array[5];

Array Slicing
-------------
LIST = @array[LIST EXPR];
@values = @array[5,6,7];
$value = @array[5,6,7];
# Prev same as: $value = $array[7];

Hash Indexing
-------------
SCALAR = $hash{SCALAR EXPR};
$value = $hash{'apple'};

Hash Slicing
------------
LIST = @hash{LIST EXPR};
@values = @hash{'apple', 'orange'};
$value = @hash{'apple', 'orange'};
# Prev same as: $value = $hash{'orange'};

List Slicing
------------
LIST = (LIST)[LIST EXPR];
@values = (split(/,/, 'a,b,c,d'))[1,2];
$value = (split(/,/, 'a,b,c,d'))[1,2];
# Prev same as: $value = (split(/,/, 'a,b,c,d'))[2];
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