如何找到最近的过去星期一？

问题描述

我使用ColdFusion 9.0.1。

I am using ColdFusion 9.0.1.

我每个星期一在午夜创建比赛。我需要使用ColdFusion（但我相信其他语言的逻辑是一样的）找到最近一个星期一的日期。一旦我确定该日期，我将把该日期放入SQL语句以获得当前排名和过去的结果。

I am creating a contest each Monday at midnight. I need to use ColdFusion (but I am sure the logic is the same for other languages) to find the date of the most recent past Monday. Once I determine that date, I will drop that date into a SQL Statement to get the current standings and past results.

所以，我需要什么功能来找到最最近过去一周？

So, what functions do I need to find the most recent past Monday?

ANSWER

Dates = structNew();
Dates.CurrentDay = dateFormat(now(), "yyyy-mm-dd");
// LOOP MAX OF SEVEN TIMES
for (i = 1; i lte 7; i++) {
    // IF CURRENT DAY OF WEEK IS MONDAY SET AND BREAK
    if (dayOfWeek(Dates.CurrentDay) == 2) {
        Dates.BikeOfTheWeekDate = Dates.CurrentDay;
        break;
    // IF CURRENT DAY OF WEEK IS NOT MONDAY SUBTRACT DAY
    } else {
        Dates.CurrentDay = dateAdd("d", -1, Dates.CurrentDay);
    }
}

推荐答案

Pseudocode ：

Pseudocode:

Get the current day
Loop
    Check if it's Monday
        If yes, break out of the loop
    Substract one
Next loop

在ColdFusion中，日与 DateAdd（d，-1，日期）并检查星期一与 DayOfWeek（日期） 2为星期一。

In ColdFusion, substract one day with DateAdd("d", -1, date) and check for Monday with DayOfWeek(date) which returns 2 for Monday.

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