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method

fetch

Importance_1
Ruby on Rails latest stable (v4.2.1) - 0 notes - Class: ActionDispatch::Http::Headers
fetch(key, *args, &block) public

Returns the value for the given key mapped to @env.

If the key is not found and an optional code block is not provided, raises a KeyError exception.

If the code block is provided, then it will be run and its result returned.

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