Access variables programmatically by name in Ruby -

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i'm not entirely sure if possible in ruby, there's easy way this. want declare variable , later find out name of variable. is, simple snippet:

foo = ["goo", "baz"]

how can name of array (here, "foo") back? if indeed possible, work on variable (e.g., scalars, hashes, etc.)?

edit: here's i'm trying do. i'm writing soap server wraps around class 3 important variables, , validation code this:

  [foo, goo, bar].each { |param|       if param.class != array         puts "param_name wasn't array. a/an #{param.class}"         return "error: param_name wasn't array"       end       }

my question then: can replace instances of 'param_name' foo, goo, or bar? these objects arrays, answers i've received far don't seem work (with exception of re-engineering whole thing ala dbr's answer)

what if turn problem around? instead of trying names variables, variables names:

["foo", "goo", "bar"].each { |param_name|   param = eval(param_name)   if param.class != array     puts "#{param_name} wasn't array. a/an #{param.class}"     return "error: #{param_name} wasn't array"   end   }

if there chance of 1 variables not being defined @ (as opposed not being array), want add "rescue nil" end of "param = ..." line keep eval throwing exception...


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