Get value from string representing local variable [duplicate]

Question

This question already has answers here:

Is there a 'variable_get' method? If not, how can I create my own? (2 answers)

I have a local variable name as a string, and need to get its value.

variable = 22
"variable".to_variable?

How can I get the value 22 form the string?

Answer 1

You can use eval.

variable = 22
eval("variable")
# => 22 

However eval can be nasty. If you dont mind declaring an instance variable, you can do something like this too:

@variable = 22
str = "variable"
instance_variable_get("@#{str}")
# => 22

Answer 2

binding.local_variable_get("variable")
# => 22

Answer 3

use eval() method:

variable = 22
eval "variable" #"variable".to_variable?
# => 22