I'm not sure your if ($stored ne $smallest) {...} is correct, for two reasons. Firstly, ne is for string comparisons and these are numbers so != would be better. Secondly, and more importantly, I think your logic might be a bit suspect. In the original post the 1 was moved further up the list so that 2 was the first element. Thus, your

$smallest = (sort @array)[0];

would give us 1 but your

$stored = shift @array;

would result in 2. Your condition would be met, your script exits with an error but the move is a valid one.

I think the only constraints were that a) the numbers are consecutive and b) one element is moved to form the new list. Thus in a list of 1 to 9, the 7 could be moved to the front giving 7,1,2,3,4,5,6,8,9 which would also fail in your script.

Cheers,

JohnGG

In reply to Re^2: Difference between two arrays by johngg
in thread Difference between two arrays by rafl

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