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-4 bytes

edited May 3, 2017 at 20:32

Ruby, 1919 15 bytes

Loving that new #sum in Ruby 2.4 :)

p$<.mapsum(&:to_i).sum

This program accepts input from either stdin or any filename(s) given as command line argument

Loving that new #sum in Ruby 2.4 :)

p$<.map(&:to_i).sum

This program accepts input from either stdin or any filename(s) given as command line argument

Loving that new #sum in Ruby 2.4 :)

p$<.sum(&:to_i)

This program accepts input from either stdin or any filename(s) given as command line argument

answered Mar 24, 2017 at 9:06

Loving that new #sum in Ruby 2.4 :)

p$<.map(&:to_i).sum

This program accepts input from either stdin or any filename(s) given as command line argument