Provide value for self when using Proc#call

Question

When using Proc#call to call a lambda function in Ruby, self always ends up with the value that it had when the function was defined, rather than the value it has w

Answer 1

You're looking for instance_eval, which evaluates a lambda in the context of the calling object.

>> $p = proc { self }
=> #
>> class Dummy
>>   def test
>>     $p.call
>>   end
>> 
>>   def test1
>>     instance_eval(&$p)
>>   end
>> end

>> d = Dummy.new
=> #
>> d.test
=> main
>> d.test1
=> #