in reply to Compare variables when the number of them vary
Replace your test by
if ( all { $serials[0] eq $_ } @serials ) { ...
PS: I replaced your == test by eq and then you can probably delete the no warnings 'numeric';
CountZero
A program should be light and agile, its subroutines connected like a string of pearls. The spirit and intent of the program should be retained throughout. There should be neither too little or too much, neither needless loops nor useless variables, neither lack of structure nor overwhelming rigidity." - The Tao of Programming, 4.1 - Geoffrey James
My blog: Imperial Deltronics
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