自定义周（从7月开始的第1周），计算周数的代码并选择(Custom weeks (1st week starting in july), code to calculate week number a

自定义周（从7月开始的第1周），计算周数的代码并选择(Custom weeks (1st week starting in july), code to calculate week number and select)

我有一个独特的情况......我有以下代码，目前允许我从一个组合框中选择一周引用的日期。我希望自动选择周（日期），具体取决于它是哪一天。例如，它是今天12月3日的第22周...如何默认组合框显示第22周？我是否应该使用不同的方法完成此操作，因为将来周日期会发生变化？

我也有我的jquery datepicker的代码，它在日期旁边显示正确的周数，但不会根据当前周自动选择合适的日期...

function myWeekCalc(date) { var checkDate = new Date(date.getTime()); // Find checkDate.setDate(checkDate.getDate() + 185 - (checkDate.getDay())); var time = checkDate.getTime(); checkDate.setMonth(0); // Compare with Jan 1 checkDate.setDate(1); return Math.floor(Math.round((time - checkDate) / 86400000) / 7) + 1; } jQuery('input[name=selectweek1]').datepicker({ dateFormat: 'yy-mm-dd', changeYear: true, changeMonth: true, firstDay: 1, calculateWeek: myWeekCalc, showWeek: true, minDate: new Date(2013, 6, 1), maxDate: new Date(2014, 5, 29) });

JSFIDDLE： http ： //jsfiddle.net/a2nmR/

I have a unique situation... I have the below code which currently allows me to select a date referenced from a week, from a combo box. I want to have the week (date) selected automatically depending on which day it is. For example, it's the 3rd of December today which falls under week 22... How do I default the combo box to display week 22? Should I have done this with a different method as in future the week dates will change?

I also have this code for my jquery datepicker, which displays the weeks correctly next to the date, but does not auto select the appropriate date depending on current week...

function myWeekCalc(date) { var checkDate = new Date(date.getTime()); // Find checkDate.setDate(checkDate.getDate() + 185 - (checkDate.getDay())); var time = checkDate.getTime(); checkDate.setMonth(0); // Compare with Jan 1 checkDate.setDate(1); return Math.floor(Math.round((time - checkDate) / 86400000) / 7) + 1; } jQuery('input[name=selectweek1]').datepicker({ dateFormat: 'yy-mm-dd', changeYear: true, changeMonth: true, firstDay: 1, calculateWeek: myWeekCalc, showWeek: true, minDate: new Date(2013, 6, 1), maxDate: new Date(2014, 5, 29) });

JSFIDDLE: http://jsfiddle.net/a2nmR/

最满意答案

使用.filter()和.prop() ：

演示： http ： //jsbin.com/aviVeyUW/3/edit

$('#entryweek2 option').filter(function(index) { return index === myWeekCalc(new Date()); }).prop('selected', true);

你也可以这样做：

演示： http ： //jsbin.com/aviVeyUW/4/edit

$('#entryweek2 option').filter(function(index) { var $this = $(this), today = new Date(), weekNo = parseInt($(this).text().split('Week ')[1]); return weekNo === myWeekCalc(today); }).prop('selected', true);

Use .filter() and .prop():

DEMO: http://jsbin.com/aviVeyUW/3/edit

$('#entryweek2 option').filter(function(index) { return index === myWeekCalc(new Date()); }).prop('selected', true);

You can also do something like this:

DEMO: http://jsbin.com/aviVeyUW/4/edit

$('#entryweek2 option').filter(function(index) { var $this = $(this), today = new Date(), weekNo = parseInt($(this).text().split('Week ')[1]); return weekNo === myWeekCalc(today); }).prop('selected', true);

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