| 1 | isFunction = (obj) -> '[object Function]' is toString.call obj
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| 2 |
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| 3 | nop = (req, res, next) -> next()
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| 4 | module.exports = (test, left, right = nop) ->
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| 5 | throw new Error 'test is not a function' unless isFunction test
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| 6 | throw new Error 'first middleware is not a function' unless isFunction left
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| 7 | throw new Error 'second middleware is not a function' unless isFunction right
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| 8 | (req, res, next) -> (if test req then left else right) req, res, next
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| 9 |
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