javascript - 用占位符填充数组 Javascript [IE 支持]

Question

我有一个从 google Analytics 的响应中获得的数组。

我的数组看起来像这样:

var mobileYesterday = [
 {hour: "00", date: "20171208", pageviews: "1"},
 {hour: "06", date: "20171208", pageviews: "1"},
 {hour: "07", date: "20171208", pageviews: "5"},
 {hour: "08", date: "20171208", pageviews: "7"},
 {hour: "09", date: "20171208", pageviews: "4"}
];

因为一天存在于 24 小时之外，所以我希望能够用占位符填充数组，其中将包含今天的日期、前一个数组中未指定的小时和 pageviews = 0。数组应该也按小时排序，因此数组将如下所示:

 var mobileYesterday = [
     {hour: "00", date: "20171208", pageviews: "1"},
     {hour: "01", date: "20171208", pageviews: "0"},
     {hour: "02", date: "20171208", pageviews: "0"},
     {hour: "03", date: "20171208", pageviews: "0"},
     {hour: "04", date: "20171208", pageviews: "0"},
     {hour: "05", date: "20171208", pageviews: "0"},
     {hour: "06", date: "20171208", pageviews: "1"},
     {hour: "07", date: "20171208", pageviews: "5"},
     {hour: "08", date: "20171208", pageviews: "7"},
     {hour: "09", date: "20171208", pageviews: "4"},
     {hour: "10", date: "20171208", pageviews: "0"},
     {hour: "11", date: "20171208", pageviews: "0"},
     {hour: "12", date: "20171208", pageviews: "0"},
     {hour: "13", date: "20171208", pageviews: "0"}
     etc..
];

我尝试用 for 循环遍历数组

var array = [];
    var date = moment().format("YYYYMMDD");

    var hourPlaceholder;
    for(var i = 0; i < 24; i++){
        if(i < 10){
            hourPlaceholder = '0'+i;
        }
        if(i > 9){
            hourPlaceholder = i;
        }


       for (var k = 0; k < mobileYesterday.length; k++){
           if(!mobileYesterday[k].uur == hourPlaceholder){
              var array_record = [
                  { "hour": hourPlaceholder, "date": date, "pageviews":0}
              ]
               array.push(array_record);
           }else{
               array.push(mobileYesterday[k]);
           }
       }
    }
    console.log(JSON.stringify(array));

但这只会返回有史以来最奇怪的数组:

[[{"hour":"00","date":"20171207","pageviews":0}],[{"hour":"00","date":"20171207","pageviews":0}],[{"hour":"00","date":"20171207","pageviews":0}],[{"hour":"00","date":"20171207","pageviews":0}],[{"hour":"00","date":"20171207","pageviews":0}],[{"hour":"00","date":"20171207","pageviews":0}],[{"hour":"00","date":"20171207","pageviews":0}],[{"hour":"00","date":"20171207","pageviews":0}],[{"hour":"00","date":"20171207","pageviews":0}],[{"hour":"00","date":"20171207","pageviews":0}],[{"hour":"00","date":"20171207","pageviews":0}],[{"hour":"00","date":"20171207","pageviews":0}],[{"hour":"00","date":"20171207","pageviews":0}],[{"hour":"00","date":"20171207","pageviews":0}],[{"hour":"00","date":"20171207","pageviews":0}],[{"hour":"00","date":"20171207","pageviews":0}],[{"hour":"00","date":"20171207","pageviews":0}],[{"hour":"00","date":"20171207","pageviews":0}],{"hour":"01","date":"20171207","pageviews":"1"},{"hour":"07","date":"20171207","pageviews":"5"},{"hour":"08","date":"20171207","pageviews":"7"},{"hour":"09","date":"20171207","pageviews":"8"},{"hour":"10","date":"20171207","pageviews":"8"},{"hour":"11","date":"20171207","pageviews":"9"},{"hour":"12","date":"20171207","pageviews":"9"},{"hour":"13","date":"20171207","pageviews":"6"},{"hour":"14","date":"20171207","pageviews":"5"},{"hour":"15","date":"20171207","pageviews":"6"},{"hour":"16","date":"20171207","pageviews":"7"},{"hour":"17","date":"20171207","pageviews":"7"},{"hour":"18","date":"20171207","pageviews":"4"},{"hour":"19","date":"20171207","pageviews":"7"},{"hour":"20","date":"20171207","pageviews":"5"},{"hour":"21","date":"20171207","pageviews":"8"},{"hour":"22","date":"20171207","pageviews":"5"},{"hour":"23","date":"20171207","pageviews":"3"},{"hour":"01","date":"20171207","pageviews":"1"},{"hour":"07","date":"20171207","pageviews":"5"},{"hour":"08","date":"20171207","pageviews":"7"},{"hour":"09","date":"20171207","pageviews":"8"},{"hour":"10","date":"20171207","pageviews":"8"},{"hour":"11","date":"20171207","pageviews":"9"},{"hour":"12","date":"20171207","pageviews":"9"},{"hour":"13","date":"20171207","pageviews":"6"},{"hour":"14","date":"20171207","pageviews":"5"},{"hour":"15","date":"20171207","pageviews":"6"},{"hour":"16","date":"20171207","pageviews":"7"},{"hour":"17","date":"20171207","pageviews":"7"},{"hour":"18","date":"20171207","pageviews":"4"},{"hour":"19","date":"20171207","pageviews":"7"},{"hour":"20","date":"20171207","pageviews":"5"},{"hour":"21","date":"20171207","pageviews":"8"},{"hour":"22","date":"20171207","pageviews":"5"},{"hour":"23","date":"20171207","pageviews":"3"},{"hour":"01","date":"20171207","pageviews":"1"},{"hour":"07","date":"20171207","pageviews":"5"},{"hour":"08","date":"20171207","pageviews":"7"},{"hour":"09","date":"20171207","pageviews":"8"},{"hour":"10","date":"20171207","pageviews":"8"},{"hour":"11","date":"20171207","pageviews":"9"},{"hour":"12","date":"20171207","pageviews":"9"},{"hour":"13","date":"20171207","pageviews":"6"},{"hour":"14","date":"20171207","pageviews":"5"},{"hour":"15","date":"20171207","pageviews":"6"},{"hour":"16","date":"20171207","pageviews":"7"},{"hour":"17","date":"20171207","pageviews":"7"},{"hour":"18","date":"20171207","pageviews":"4"},{"hour":"19","date":"20171207","pageviews":"7"},{"hour":"20","date":"20171207","pageviews":"5"},{"hour":"21","date":"20171207","pageviews":"8"},{"hour":"22","date":"20171207","pageviews":"5"},{"hour":"23","date":"20171207","pageviews":"3"},{"hour":"01","date":"20171207","pageviews":"1"},{"hour":"07","date":"20171207","pageviews":"5"},{"hour":"08","date":"20171207","pageviews":"7"},{"hour":"09","date":"20171207","pageviews":"8"},{"hour":"10","date":"20171207","pageviews":"8"},{"hour":"11","date":"20171207","pageviews":"9"},{"hour":"12","date":"20171207","pageviews":"9"},{"hour":"13","date":"20171207","pageviews":"6"},{"hour":"14","date":"20171207","pageviews":"5"},{"hour":"15","date":"20171207","pageviews":"6"},{"hour":"16","date":"20171207","pageviews":"7"},{"hour":"17","date":"20171207","pageviews":"7"},{"hour":"18","date":"20171207","pageviews":"4"},{"hour":"19","date":"20171207","pageviews":"7"},{"hour":"20","date":"20171207","pageviews":"5"},{"hour":"21","date":"20171207","pageviews":"8"},{"hour":"22","date":"20171207","pageviews":"5"},{"hour":"23","date":"20171207","pageviews":"3"},{"hour":"01","date":"20171207","pageviews":"1"},{"hour":"07","date":"20171207","pageviews":"5"},{"hour":"08","date":"20171207","pageviews":"7"},{"hour":"09","date":"20171207","pageviews":"8"},{"hour":"10","date":"20171207","pageviews":"8"},{"hour":"11","date":"20171207","pageviews":"9"},{"hour":"12","date":"20171207","pageviews":"9"},{"hour":"13","date":"20171207","pageviews":"6"},{"hour":"14","date":"20171207","pageviews":"5"},{"hour":"15","date":"20171207","pageviews":"6"},{"hour":"16","date":"20171207","pageviews":"7"},{"hour":"17","date":"20171207","pageviews":"7"},{"hour":"18","date":"20171207","pageviews":"4"},{"hour":"19","date":"20171207","pageviews":"7"},{"hour"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Answer 1

鉴于您的数组结构，mobileYesterday.indexOf(10) 将始终返回 -1。

此外，mobileYesterday[k].uur永远是undefined , 因为没有名为 uur 的属性在你的对象中。

使用 Array 构造函数 以及 map

var pad2 = ( int ) => ( "0" + int ).slice( -2 ); 
var output = Array(24).join("0").split("").map( function(it, in){
  in = pad2(in);
  var doesExists = mobileYesterday.find( s => s.hour == in ); //find existing object
  if( !!doesExists )
  {
     return doesExists;
  } 
  else
  {
     return { hour : in, date : "20171208", pageviews : 0 }; //if object doesn't exists return a new one
  }
});

演示

var mobileYesterday = [
 {hour: "00", date: "20171208", pageviews: "1"},
 {hour: "06", date: "20171208", pageviews: "1"},
 {hour: "07", date: "20171208", pageviews: "5"},
 {hour: "08", date: "20171208", pageviews: "7"},
 {hour: "09", date: "20171208", pageviews: "4"}
];

var pad2 = (int) => ("0" + int).slice(-2);
var output = Array(24).join("0").split("").map(function(it, ind ) { 
  ind = pad2( ind );
  var doesExists = mobileYesterday.find(s => s.hour == ind );
  if (!!doesExists) {
    return doesExists;
  } else {
    return {
      hour: ind ,
      date: "20171208",
      pageviews: 0
    }; //if object doesn't exists return a new one
  }
});
console.log( output );