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JunichiIto/gist:9870182

Created March 30, 2014 09:29
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Ruby: How to count for each word
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gistfile1.rb
str = "no ruby no life" #=> count as {"no"=>2,"ruby"=>1,"life"=>1}
Hash[str.scan(/\w+/).group_by{|s|s}.map{|k,v|[k,v.size]}]
str.scan(/\w+/).each_with_object(Hash.new(0)){|s,h|h[s]+=1}
# require Ruby 2.1.1
str.scan(/\w+/).group_by{|s|s}.map{|k,v|[k,v.size]}.to_h
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