Why is rack response body an array not a string?
rack, ruby
Solution
I think rack originated on python's wsgi. Here is the explanation for python: http://www.python.org/dev/peps/pep-3333/#buffering-and-streaming
Problem
a classic hello world example from their doc, ``` class HelloWorld def call(env) return [200, {}, ["Hello world!"]] end end ``` my question is why the third value is [Hello world!"], not "Hello world"? From their doc, The Body must respond to each and must only yield String values. The Body itself should not be an instance of String, as this will break in Ruby 1.9. Why body needs to respond to each? and in what case does it matter?