| module.exports = chain |
| var bindActor = require("./bind-actor.js") |
| chain.first = {} ; chain.last = {} |
| function chain (things, cb) { |
| var res = [] |
| ;(function LOOP (i, len) { |
| if (i >= len) return cb(null,res) |
| if (Array.isArray(things[i])) |
| things[i] = bindActor.apply(null, |
| things[i].map(function(i){ |
| return (i===chain.first) ? res[0] |
| : (i===chain.last) |
| ? res[res.length - 1] : i })) |
| if (!things[i]) return LOOP(i + 1, len) |
| things[i](function (er, data) { |
| if (er) return cb(er, res) |
| if (data !== undefined) res = res.concat(data) |
| LOOP(i + 1, len) |
| }) |
| })(0, things.length) } |
