cheat sheets.

Cheat Sheet Title: [ no_spaces_alphanumeric_only ]

Cheat Sheet:
== Rackup hello.ru: require 'hello' use Rack::Reloader use Rack::CommonLogger use Rack::ShowExceptions use Rack::ShowStatus run HelloApp.new run server: % rackup hello.ru == Calling convention def call(env) [StatusCode, { "Header" => "Value" }, ["Body"]] end

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