Question

I have a bit of a problem with MongoDB in that it returns hashes with the keys in double quotes and integers as floats all the time, has this been a problem for anyone else?

for examples after a map reducing or grouping, say I have a bunch of hashes which look like this:

{"unknown"=>54.0, "pedestrians"=>572.0, "vehicles"=>1045.0}

But what I really want is:

{ unknown: 54, pedestrians: 572, vehicles: 1045 }

Any ideas on how I can easily convert it?

Answer 1

You could do:

original = {"unknown"=>54.0, "pedestrians"=>572.0, "vehicles"=>1045.0}
converted = Hash[ original.map { |key, value| [key.to_sym, value.to_i] } ]

Or if you’re using Rails, you could make it a HashWithIndifferentAccess and just convert the values:

original = HashWithIndifferentAccess.new(original)
original.each { |key, value| original[key] = value.to_i }