Hi brusimm,

There are a lot of ways to use an array backwards.

One is to simply reverse the order of the sort.  For example, instead of 

my @sorted = sort @unsorted;

[download]

which is doing an implicit sort { $a cmp $b } @unsorted, you could do: 

my @sorted = sort { $b cmp $a } @unsorted;

[download]

to have the order reversed at the end of the sort.

Another way is to read an item one-at-a-time from the end of the list, such as in: 

my $nextitem;
while ($nextitem = pop @rocks) {
    # Use $nextitem
}

[download]

(Sorry, I couldn't resist using pop @rocks :-))

As a 3rd and final example, read one at a time from the end of the array using an index, using the -N notation (which reads from the -Nth value of the array each time): 

for (my $i=1; $i <= @rocks; $i++) {
    my $nextitem = $rocks[- $i];    # Take the ${i}th item from the en
+d
}

[download]
s''(q.S:$/9=(T1';s;(..)(..);$..=substr+crypt($1,$2),2,3;eg;print$..$/

In reply to Re: For Loops and Reversing output by liverpole
in thread For Loops and Reversing output by brusimm

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