rails accessing hashes with variables

Question

v = { "foo"=>"bar"}  
v["foo"] // bar

Say,

k = {:bar => 1}
>k[:bar] // 1 

But,

k[v["foo"]] // nil

how to access key ==> value ( k[ key ] = value ) from hashes using a variable, say v["foo"]

Answer 1

You'll need to run to_sym on the result of v["foo"] in order to the the value in k:

1.9.3p484 :007 > v = { "foo"=>"bar"}  
 => {"foo"=>"bar"} 
1.9.3p484 :008 > k = {:bar => 1}
 => {:bar=>1} 
1.9.3p484 :009 > k[v["foo"].to_sym]
 => 1