計數出現基於小時在陣列

我有以下的方法 -計數出現基於小時在陣列

// Push the date values into dateArray 
var dateArray = []; 

    $.each(dateHtml, function (i, el) { 
       dateArray.push(htmlDateValue); 
     } 
    });

然後排序最早日期 -

// sort array to have earliest date first 
    dateArray.sort(function (a, b) { 
     return new Date(b.date) - new Date(a.date); 
    });

離開我例如 -

dateArray = 
["02/10/2015 00:00:07", 
"02/10/2015 00:00:08", 
"02/10/2015 01:00:03", 
"02/10/2015 01:00:05", 
"02/10/2015 02:00:14", 
"03/10/2015 07:00:37"];

我已經創建了var arrOfCounts = [];，我想填充每個h的計數值我們的存在於每個天中。

因此，例如上述的陣列的結果應該是 -

arrOfCounts = 
[2, // 2 instances of values within the hour of 00:00:00 on the 02/10/2015 
2, // 2 instances of values within the hour of 01:00:00 on the 02/10/2015 
1, // 1 instances of values within the hour of 02:00:00 on the 02/10/2015 
1]; // 1 instances of values within the hour of 07:00:00 on the 03/10/2015

所以我已經開始在dateArray每個值的循環 -

$.each(dateArray, function (i, el) { 

        // Here I have to establish the value of count 
        arrOfCounts.push(count); 
      } 
     });

我怎麼能做到這一點？

來源

2015-10-02 Ebikeneser

毫無疑問，開始與該處理日期/時間以及一個像樣的圖書館！ [moment.js]（http://momentjs.com/）通常很受歡迎 – Jamiec

可能的重複http://stackoverflow.com/questions/16292349/count-occurrences-of-array-objects – guest271314

創建自定義對象與代表的日期和時間

var dates = ["02/10/2015 00:00:07", 
 
    "02/10/2015 00:00:08", 
 
    "02/10/2015 01:00:03", 
 
    "02/10/2015 01:00:05", 
 
    "02/10/2015 02:00:14", 
 
    "03/10/2015 07:00:37" 
 
]; 
 
var counts = {}; 
 

 
dates.forEach(function(date) { 
 
    var dateS = date.split(' ')[0]; 
 
    var hour = new Date(date).getHours(); 
 

 
    if (typeof counts[dateS] == 'undefined') { 
 
    counts[dateS] = {}; 
 
    } 
 

 
    if (typeof counts[dateS][hour] == 'undefined') { 
 
    counts[dateS][hour] = 0; 
 
    } 
 

 
    counts[dateS][hour] += 1; 
 
}); 
 

 
console.log(counts);

來源

2015-10-02 14:01:30 AmmarCSE

指出它做得好。 – Ebikeneser

@Ebikeneser，很高興它幫助:) – AmmarCSE

釘住它...直到你在一個瀏覽器上嘗試它的JavaScript日期的構造函數不接受該格式。不能告訴你，如果你是美國或英國的格式，但無論哪一個嘗試交換你的瀏覽器到另一個，並使用一個看起來不正確的日期（例如'24/12/2015'或'12/24/2015'） – Jamiec

因此，例如上述的陣列的結果應該是在鍵 -

arrOfCounts = 
[2, // 2 instances of values within the hour of 00:00:00 on the 02/10/2015 
2, // 2 instances of values within the hour of 01:00:00 on the 02/10/2015 
1, // 1 instances of values within the hour of 02:00:00 on the 02/10/2015 
1]; // 1 instances of values within the hour of 07:00:00 on the 03/10/2015

試試utilizin摹Array.prototype.map()，String.prototype.match()與RegExp/\d+:\d+/，Array.prototype.filter()

var dateArray = ["02/10/2015 00:00:07" 
 
       , "02/10/2015 00:00:08" 
 
       , "02/10/2015 01:00:03" 
 
       , "02/10/2015 01:00:05" 
 
       , "02/10/2015 02:00:14" 
 
       , "03/10/2015 07:00:37" 
 
       ]; 
 

 
var arrOfCounts = dateArray.map(function(val) { 
 
        return val.match(/\d+:\d+/)[0] 
 
        }) 
 
        .map(function(count, i, array) { 
 
        return count !== array[i + 1] 
 
          ? array.toString() 
 
          .match(new RegExp(count, "g")).length 
 
          : null 
 
        }) 
 
        .filter(Boolean); 
 
console.log(arrOfCounts)

來源

2015-10-03 02:39:30 guest271314

計數出現基於小時在陣列

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