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Porta/out

Created March 27, 2014 18:28
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out
irb(main):006:0> '+10'.to_i
=> 10
irb(main):007:0> '10+'.to_i
=> 10
irb(main):008:0>
irb(main):008:0> '-10'.to_i
=> -10
irb(main):009:0> '10-'.to_i
=> 10
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