Your code didn't really revert the array. Try printing the array in each step: 
a b c d e f g h i j k l m n o p q r s t u v w x y z
z a b c d e f g h i j k l m n o p q r s t u v w x y
y z a b c d e f g h i j k l m n o p q r s t u v w x
x y z a b c d e f g h i j k l m n o p q r s t u v w
w x y z a b c d e f g h i j k l m n o p q r s t u v
v w x y z a b c d e f g h i j k l m n o p q r s t u
u v w x y z a b c d e f g h i j k l m n o p q r s t
t u v w x y z a b c d e f g h i j k l m n o p q r s
s t u v w x y z a b c d e f g h i j k l m n o p q r
r s t u v w x y z a b c d e f g h i j k l m n o p q
q r s t u v w x y z a b c d e f g h i j k l m n o p
p q r s t u v w x y z a b c d e f g h i j k l m n o
o p q r s t u v w x y z a b c d e f g h i j k l m n
n o p q r s t u v w x y z a b c d e f g h i j k l m
m n o p q r s t u v w x y z a b c d e f g h i j k l
l m n o p q r s t u v w x y z a b c d e f g h i j k
k l m n o p q r s t u v w x y z a b c d e f g h i j
j k l m n o p q r s t u v w x y z a b c d e f g h i
i j k l m n o p q r s t u v w x y z a b c d e f g h
h i j k l m n o p q r s t u v w x y z a b c d e f g
g h i j k l m n o p q r s t u v w x y z a b c d e f
f g h i j k l m n o p q r s t u v w x y z a b c d e
e f g h i j k l m n o p q r s t u v w x y z a b c d
d e f g h i j k l m n o p q r s t u v w x y z a b c
c d e f g h i j k l m n o p q r s t u v w x y z a b
b c d e f g h i j k l m n o p q r s t u v w x y z a
a b c d e f g h i j k l m n o p q r s t u v w x y z

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So, you rather "rotated" it, and it ended up being exactly the same as in the beginning.

As to $thing: changing the array you iterate over is dangerous. In this case, check what's the first element in the first iteration, second element in the second iteration, etc. You don't need to use the loop variable, it's there only to guarantee the number of iterations; I'd probably just write 

for (@arr) {

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or, to avoid changing the array being iterated 

for (1 .. @arr) {

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to make it clear the number of steps is what matters.

($q=q:Sq=~/;[c](.)(.)/;chr(-||-|5+lengthSq)`"S|oS2"`map{chr |+ord
}map{substrSq`S_+|`|}3E|-|`7**2-3:)=~y+S|`+$1,++print+eval$q,q,a,

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In reply to Re: Array confusion. by choroba
in thread Array confusion. by anonypl

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