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⟩ What are filters? and how many types of filters are there in ruby?

Filters enable controllers to run shared pre and post

processing code for its actions.

Filter methods are macro-style, that is, they appear at the

top of your controller method, inside the class context,

before method definitions.

the below types of filters in ruby

before_filter,

after_filter,

prepend_before_filter,

prepend_after_filter,

around_filter

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