Question

我正在使用setTimeout来查看强化学习算法，并对其行为感到好奇。

以下代码显示了while aop中使用的setTimeout。循环的每次迭代都应使用state的版本，该版本已由前一次迭代修改。是否有可能第二次调用setTimeout将在第一次调用之前发生，并且state的值将无法正确更新？我问的部分是因为我认为我实际上已经注意到了一些奇怪的行为，当延迟时间太小时，调用doLearningInnerLoop的控制台日志会出现故障（即时间将= 1 4 3 2 5 6 ..等等）。

var doLearningInnerLoop = function(time, observedData, stateHolder, domain, sampleAction, selectModel, numSamples, depth, discount, stateQueries) {
    console.log("new Round, time = " + time);
    var state = stateHolder.state;
    var currentModel = selectModel(observedData, 10, stateQueries);
    var bestAction = sparseSampleMcmc(depth, numSamples, discount, currentModel, state, sampleAction, stateQueries);
    var newStateReward = domain.executeAction(bestAction, stateQueries);
    observedData.push(bestAction, newStateReward[1], newStateReward[0]);
    stateHolder.state = newStateReward[0];
}

var doLearningLoops = function(time, observedData, state, domain, sampleAction, selectModel, numSamples, depth, discount, stateQueries) {
    stateHolder = {};
    stateHolder.state = state;
    while(stateQueries['canContinue']['codeAsFunction'](time, stateHolder.state) === true) {
        setTimeout(doLearningInnerLoop, 1000, time, observedData, stateHolder, domain, sampleAction, selectModel, numSamples, depth, discount, stateQueries);
        time += 1;
    }
    return state;
}

Answer 1

我相信我发现类似的setTimeout调用问题没有按预期顺序发生。

请参阅：Are equal timeouts executed in order in Javascript?

上面的答案是Firefox似乎正确地做到了（基于来源）但是其他人也有一些人反对这个问题（也许他们在不同的浏览器上）。

setTimeout调用的顺序

1 个答案: