在Flash AS3的DataGrid排序日期 [英] Sort dates in a Flash AS3 DataGrid

问题描述

这已经快把我逼疯了，我需要一个Flash DataGrid列（没有的Flex），按日期排序。我试图给日期列中包含一种功能：

This has been driving me crazy, I need to sort a Flash DataGrid column (not Flex) by date. I have tried giving the date column a sort function like below:

            colTwo.sortCompareFunction = sortDate;

和是这种功能：

        private function sortDate ($obj1,$obj2) : int {

        trace("created date in sort "+$obj1["created"]);

        var t1:Array = $obj1["created"].toString().split("-");
        var t2:Array = $obj2["created"].toString().split("-");
        var t1dt:Number=(new Date(Number(t1[0]),Number(t1[1]),Number(t1[2]))).getTime();
        var t2dt:Number=(new Date(Number(t2[0]),Number(t2[1]),Number(t2[2]))).getTime();

        trace(t1dt);

       if(t1dt < t2dt) {
            return -1;
        } else if(t1dt == t2dt) {
            return 0;
        } else {
            return 1;
        }
    }

但是，这似乎仍然试图将列按字母顺序排序。

But this still seems to attempt to sort the column alphabetically.

任何帮助将是AP preciated。

Any help would be appreciated.

推荐答案

由redHouse71答案是确定的，因为它会给你一个正确的结果，但作为一个code例如......好吧，下面是另一种变体，它本质上是做同样的事情，但就是少罗嗦了。

The answer by redHouse71 is OK, because it would give you a correct result, but as a code example... well, below is another variant, which does essentially the same thing, but is less wordy.

private function sortDate(a:Object, b:Object):int
{
    var difference:Number = 
        this.truncateDate(a) - this.truncateDate(b);

    return difference / Math.abs(difference);
}
// replace Object with the proper type
private function truncateDate(object:Object):uint
{
    return (object.created as Date).time * 0.0001;
}

编辑：但是你为什么要截断日期秒？此外，它没有必要返回严格-1，0，1，基本上你可以破除只是 this.truncateDate（一） - this.truncateDate（B） - 我添加的舍入，使之表现为原始应答

but why do you have to truncate the date to seconds? Also, it's not necessary to return strictly -1, 0, 1, basically you could do away with just this.truncateDate(a) - this.truncateDate(b) - I added the "rounding" to make it behave as the original answer.

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