@_{@telephones}=();         # %_ hash from @telephones
print+                      # print the 
join $/,                    # joined with "\n" separator 
sort{ $a <=> $b }keys%_;    # list which comes from %_ keys

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In reply to Re^3: a way to do 'sort|uniq' by sh1tn
in thread a way to do 'sort|uniq' by jch341277

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