A slice is just a list of values; copies of the values from whichever datastructure they were drawn. They are no longer associated with that originating data structure. As soon as you 'take a slice of an array', you have copied the values into new memory--a list--and all association with the original array is lost.

No. This is wrong. A slice is a list of aliases to the array elements: 

my @a = (1,2,3,4,5);
for (@a[1,3,4]) {$_+=10};
print join( ',', @a), "\n";

# or

my @a = (1,2,3,4,5);
sub foo { for(@_) {$_+=10} }
foo( @a[1,3,4]);
print join( ',', @a), "\n";

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It's only when you assign the slice to another array that the values are copied.

Jenda
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In reply to Re^2: Array Slice Referencing by Jenda
in thread Array Slice Referencing by PerlPhi

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