Created
September 15, 2016 00:26
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| def pairwise_sum(target, list) | |
| seen = {} | |
| list.each do |element| | |
| if seen[target - element] | |
| p [element, seen[element]] | |
| else | |
| seen[element] = element | |
| end | |
| end | |
| end |
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