--- /dev/null
+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) }