Is there a way to access method arguments in Ruby? -

new ruby , ror , loving each day, here question since have not idea how google (and have tried :) )

we have method

def foo(first_name, last_name, age, sex, is_plumber)     # code     # error happens here     logger.error "method has failed, here method arguments #{something}"     end 

so looking way arguments passed method, without listing each one. since ruby assume there way :) if java list them :)

output be:

method has failed, here method arguments {"mario", "super", 40, true, true} 

in ruby 1.9.2 , later can use parameters method on method list of parameters method. return list of pairs indicating name of parameter , whether required.

e.g.

if do

def foo(x, y) end 

then

method(:foo).parameters # => [[:req, :x], [:req, :y]] 

you can use special variable __method__ name of current method. within method names of parameters can obtained via

args = method(__method__).parameters.map { |arg| arg[1].to_s } 

you display name , value of each parameter with

logger.error "method failed " + args.map { |arg| "#{arg} = #{eval arg}" }.join(', ') 

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note: since answer written, in current versions of ruby eval can no longer called symbol. address this, explicit to_s has been added when building list of parameter names i.e. parameters.map { |arg| arg[1].to_s }