The asignment is unnecssary since you've already modified @arr1 by modifying $_. 
use List::MoreUtils qw( apply );
@array = apply { s/\s+\z// } @array;

[download]

or 

map { s/\s+\z// } @array;

[download]

or 

s/\s+\z// for @array;

[download]

In reply to Re^2: How to delete trailing spaces from array elements? by ikegami
in thread How to delete trailing spaces from array elements? by rcu

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