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rOACCT/node_modules/trough/index.js
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index.js
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			'use strict'

			var wrap = require('./wrap.js')

			module.exports = trough

			trough.wrap = wrap

			var slice = [].slice

			// Create new middleware.
			function trough() {
			var fns = []
			var middleware = {}

			middleware.run = run
			middleware.use = use

			return middleware

			// Run `fns`. Last argument must be a completion handler.
			function run() {
			var index = -1
			var input = slice.call(arguments, 0, -1)
			var done = arguments[arguments.length - 1]

			if (typeof done !== 'function') {
			throw new Error('Expected function as last argument, not ' + done)
			}

			next.apply(null, [null].concat(input))

			// Run the next `fn`, if any.
			function next(err) {
			var fn = fns[++index]
			var params = slice.call(arguments, 0)
			var values = params.slice(1)
			var length = input.length
			var pos = -1

			if (err) {
			done(err)
			return
			}

			// Copy non-nully input into values.
			while (++pos < length) {
			if (values[pos] === null \|\| values[pos] === undefined) {
			values[pos] = input[pos]
			}
			}

			input = values

			// Next or done.
			if (fn) {
			wrap(fn, next).apply(null, input)
			} else {
			done.apply(null, [null].concat(input))
			}
			}
			}

			// Add `fn` to the list.
			function use(fn) {
			if (typeof fn !== 'function') {
			throw new Error('Expected `fn` to be a function, not ' + fn)
			}

			fns.push(fn)

			return middleware
			}
			}