此代码会终止页面

Question

我有一个功能

makeMarks: (first, nextIncrement, classifier) ->
    results = new Array()

    t = first(@minT)
    while t<=@maxT
        mark = 
            t: t
            x: this.tToX(t)
            class: classifier(t)

        results.push(mark)

        t = nextIncrement(t)

    results

这个函数适用于以下两个函数作为参数

# parameters for hour tickmarks
@firstHour = (t) ->
    msPerHour = 1000*60*60
    Math.floor(t / msPerHour) * msPerHour

@nextHour = (currentHour) ->
    msPerHour = 1000*60*60
    currentHour + msPerHour

这样称呼

marks = markMaker.makeMarks( @firstMonth, @nextMonth, @classifier)

现在问题：

# parameters for month tickmarks
@firstMonth = (minT) ->
msPerDay = 1000*60*60*24
t = Math.floor(minT/msPerDay) * msPerDay
d = new Date(t)
while(d.getDate() isnt 0)
        t += msPerDay
        d.setTime(t)
t

@nextMonth = (currentMonth) ->
msPerDay = 1000*60*60*24
t = currentMonth + msPerDay
d = new Date(t)
while(d.getDate() isnt 0)
        t += msPerDay
        d.setTime(t)
t

小时代码工作正常，但月份代码似乎没有终止。

Answer 1

getDate函数永远不会返回0.它的最小值是1，它的最大值是31.如果你正在寻找超出该范围的任何东西，那就等了很长时间没有来的火车。