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== Cookies ==
Your application can store small amounts of data on the client - called cookies - that will be persisted across requests and even sessions. Rails provides easy access to cookies via the `cookies` method, which - much like the `session` - works like a hash:
TODO: Find a real-world example where cookies are used
[source, ruby]
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class FooController < ApplicationController
def foo
cookies[:foo] = "bar"
end
def display_foo
@foo = cookies[:foo]
end
def remove_foo
cookies.delete(:foo)
end
end
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Note that while for session values, you set the key to `nil`, to delete a cookie value, you use `cookies.delete(:key)`.
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