从二维数组创建多维数组

Question

这就是我所拥有的，我想将其变成多维数组

var calculateDates = function(date1, date2) {
  var dt1 = new Date(date1);
  var dt2 = new Date(date2);
  return Math.floor((Date.UTC(dt2.getFullYear(), dt2.getMonth(), dt2.getDate()) - Date.UTC(dt1.getFullYear(), dt1.getMonth(), dt1.getDate())) / (1000 * 60 * 60 * 24));
}

var startDate = ["10 Jan 1982", "05 Mar 1990", "28 Dec 2001"];
var endDate = ["25 Jan 1982", "06 Mar 1990", "02 Jan 2002"];

var totalDays = 0;

for (var i = 0; i < startDate.length; i++) {
  var days = calculateDates(startDate[i], endDate[i]);
  console.log("Number of days between", startDate[i], "and", endDate[i], "is", days);
  totalDays += days; 
}

console.log("Total number of days:", totalDays);

Answer 1

您可以创建日期对对象的数组。您还可以将每对的结果存储在那里。

var calculateDates = function(date1, date2) {
  var dt1 = new Date(date1);
  var dt2 = new Date(date2);
  return Math.floor((Date.UTC(dt2.getFullYear(), dt2.getMonth(), dt2.getDate()) - Date.UTC(dt1.getFullYear(), dt1.getMonth(), dt1.getDate())) / (1000 * 60 * 60 * 24));
}

var dates = [{
    startDate: "10 Jan 1982",
    endDate: "25 Jan 1982"
  },
  {
    startDate: "05 Mar 1990",
    endDate: "06 Mar 1990",
  },
  {
    startDate: "28 Dec 2001",
    endDate: "02 Jan 2002"
  }
]

function calculateArray(dates) {
  for (var i = 0; i < dates.length; i++) {
    var { startDate, endDate } = dates[i];
    var days = calculateDates(startDate, endDate);
    dates[i].diff = days;
  }
  return dates;
}

var result = calculateArray(dates);
console.log(result)
console.log("Total number of days:", result.reduce(function(agg, item) {
  return agg + item.diff
}, 0));

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