Created
October 21, 2009 05:37
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| def hyphenize_numbers2 *args | |
| puts args.map{|v| v.to_i}.sort.uniq.unshift(nil).enum_for(:each_cons, 2).inject([]){|dst, src| dst.push((!src[0] || src[1] - src[0] > 1) ? [src[1]] : dst.pop.push(src[1]))}.map{|nums| nums.length == 1 ? nums[0].to_s : "#{nums.first}-#{nums.last}"}.join(", ") + "." | |
| end |
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