删除数组元素并将它们填充在 javascript 中的另一个数组中

Remove array elements and populate them in another array in javascript

本文关键字：javascript 另一个 数组 填充 数组元素 删除      更新时间：2023-09-26

我试图在每次迭代中分隔每个月的日期。我有一个数组var selected=["pre populated with special dates"]其中包含所有选定的日期。现在在此代码中，我如何修改它以从数组中删除每个月selected[]并在每次迭代中仅使用此特定月份的日期填充thisMonthDates[]？

   var ind=start.getMonth();
            var thisMonthDates = [];
            while(ind<=yearDifference){    
                for (var k = 0; k < selectedArrayLength; k++) {
                    if (new Date(selected[k]).getMonth() == monthIndex[ind]) {
                        thisMonthDates = selected[k];
                        //console.log(new Date(thisMonthDates[k]));
                    }
                }
                for(var eachDt=0; eachDt<thisMonthDates.length; eachDt++) {
                   //code for highlighting the dates
                }
                ind++;
            }

以下是selected[]数组内容。循环之前thisMonthDates[]是一个空数组。

selected = [Date 2015-01-06T19:00:00.000Z, 
Date 2015-01-13T19:00:00.000Z,Date 2015-01-20T19:00:00.000Z,Date 2015-01-27T19:00:00.000Z, 
Date 2015-02-03T19:00:00.000Z,Date 2015-02-10T19:00:00.000Z,Date 2015-02-17T19:00:00.000Z, 
Date 2015-02-24T19:00:00.000Z,Date 2015-03-03T19:00:00.000Z,Date 2015-03-10T19:00:00.000Z, 
Date 2015-03-17T19:00:00.000Z,Date 2015-03-24T19:00:00.000Z,Date 2015-03-31T19:00:00.000Z, 
Date 2015-04-07T19:00:00.000Z,Date 2015-04-14T19:00:00.000Z,Date 2015-04-21T19:00:00.000Z, 
Date 2015-04-28T19:00:00.000Z,Date 2015-05-05T19:00:00.000Z,Date 2015-05-12T19:00:00.000Z, 
Date 2015-05-19T19:00:00.000Z];

这个循环应该可以解决问题

for (var k = 0; k < selectedArrayLength; k++) {
    if (new Date(selected[k]).getMonth() == monthIndex[ind]) {
        thisMonthDates.push(selected.splice(k, 1));
        k--; // since we removed an element we need to decrement k
    }
}

看看这个例子是否有帮助：

http://plnkr.co/edit/XbnJV0B0bO00o4iJdBtV

var selected = [];
var JANUARY = 0
var FEBRUARY = 1
var MARCH = 2;
selected.push(new Date(2015, FEBRUARY, 15));
selected.push(new Date(2015, JANUARY, 10));
selected.push(new Date(2015, FEBRUARY, 6));
selected.push(new Date(2015, MARCH, 25));
var thisMonth = [];
for (var i = 0; i < selected.length; i++) {
    if (selected[i].getMonth() === FEBRUARY) {
        thisMonth.push(selected[i]);
    }
}
console.log(selected);
console.log(thisMonth);

和输出：

[Sun Feb 15 2015 00:00:00 GMT+1100 (AEDT), Sat Jan 10 2015 00:00:00 GMT+1100 (AEDT), Fri Feb 06 2015 00:00:00 GMT+1100 (AEDT), Wed Mar 25 2015 00:00:00 GMT+1100 (AEDT)]
[Sun Feb 15 2015 00:00:00 GMT+1100 (AEDT), Fri Feb 06 2015 00:00:00 GMT+1100 (AEDT)]
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