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13k/pry20130406-20034-1aktod6.rb

Created April 6, 2013 23:57
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Hash "mapping" returning a new hash, instead of using the ugliest thing: `Hash[ Hash#map ]`
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pry20130406-20034-1aktod6.rb
h = {a: 13, b: 31}
# => {:a=>13, :b=>31}
h.merge(h) {|k, v0, v1| v0 * 2 }
# => {:a=>26, :b=>62}
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