![arrays - Need guidance to use .map,.group,.pluck, etc. to make multi series line chart in ruby on rails app - Stack Overflow arrays - Need guidance to use .map,.group,.pluck, etc. to make multi series line chart in ruby on rails app - Stack Overflow](https://i.stack.imgur.com/WZbIp.png)
arrays - Need guidance to use .map,.group,.pluck, etc. to make multi series line chart in ruby on rails app - Stack Overflow
![arrays - Need guidance to use .map,.group,.pluck, etc. to make multi series line chart in ruby on rails app - Stack Overflow arrays - Need guidance to use .map,.group,.pluck, etc. to make multi series line chart in ruby on rails app - Stack Overflow](https://i.stack.imgur.com/eXf5N.png)
arrays - Need guidance to use .map,.group,.pluck, etc. to make multi series line chart in ruby on rails app - Stack Overflow
![ruby on rails 3 - How to query in database with GraphQL where to pluck only selected fields not all fields? - Stack Overflow ruby on rails 3 - How to query in database with GraphQL where to pluck only selected fields not all fields? - Stack Overflow](https://i.stack.imgur.com/D5gM2.png)