hi,
irb(main):001:0> str=“1500,my sql,date 2500,my sql,date” => “1500,my sql,date 2500,my sql,date” irb(main):002:0> hi=str.scan(/^(\d+)/) => [[“1500”]] irb(main):005:0> hi[0] => [“1500”] irb(main):006:0> hi[0].to_i NoMethodError: undefined method `to_i’ for [“1500”]:Array from (irb):6 irb(main):007:0> hi[0][0].to_i => 1500 irb(main):008:0>
the problem is you are getting arrays of arrays
i just modified some part of your code
1)hi=str.scan( /(\d+)/) 2)hi.inject(0){|sum, element|(sum.to_i)+(element[0].to_i)}
i also did
irb(main):016:0> hi=str.scan(/(\d+)/).flatten
=> [“1500”, “234”, “2500”] irb(main):017:0> hi.inject(0){|sum, element|(sum.to_i)+(element.to_i)} #your code => 4234
i hope this helps
regards gaurav
