git ssb

1
function append(ary, ary2) {
2
  if(!Array.isArray(ary2))
3
    ary.push(ary2)
4
  else
5
    while(ary2.length)
6
      ary.push(ary2.shift())
7
  return ary
8
}
9
10
module.exports = function evolve (update, act, state, events) {
11
  do {
12
    var next = update(state, events.shift())
13
    state = next.state
14
    if(Array.isArray(next.effects)) {
15
      while(next.effects.length)
16
        append(events, act(state, next.effects.shift())||[])
17
    } else if(next.effects)
18
      append(events, act(state, next.effects) || [])
19
  }
20
  while(events.length)
21
22
  return state
23
}
24
25