Question

Regardless of whether it’s good practice or not, how can I dynamically call accessor methods in Ruby?

Here’s an example class:

class Test_Class   attr_accessor :a, :b end 

I can use the Object.send method to read the variable…

instance.a = 'value' puts( instance.send( 'a' ) ) # => value 

But I’m having a hard time trying to write to it. These throw ‘wrong number of arguments (1 for 0) (ArgumentError)’

instance.send('a', 'value') 

and

instance.method('a').call('value') 

Please help me StackOverflow!

Answer 1

I am not a ruby expert, but I think that you could do:

instance.send('a=', 'value')