Proc objects are blocks of code that have been bound to a set of local variables. Once bound, the code may be called in different contexts and still access those variables. 

   def gen_times(factor)
     return Proc.new {|n| n*factor }
   end

   times3 = gen_times(3)
   times5 = gen_times(5)

   times3.call(12)               #=> 36
   times5.call(5)                #=> 25
   times3.call(times5.call(4))   #=> 60
Methods
E
R
Instance Public methods
exit_value()

call_seq: 

  local_jump_error.exit_value  => obj

Returns the exit value associated with this LocalJumpError.

Source: show 

static VALUE
localjump_xvalue(exc)
    VALUE exc;
{
    return rb_iv_get(exc, "@exit_value");
}
local_jump_error.reason => symbol

The reason this block was terminated: :break, :redo, :retry, :next, :return, or :noreason.

Source: show 

static VALUE
localjump_reason(exc)
    VALUE exc;
{
    return rb_iv_get(exc, "@reason");
}