js & sort array object

sort array object in js

https://flaviocopes.com/how-to-sort-array-of-objects-by-property-javascript/

  1. let msgs = [
  2.     {
  3.       "senderUid": "6845484",
  4.       "receiverUid": "6845481",
  5.       "serialNum": "A 1564737163253",
  6.       "msgId": 606896983568064500,
  7.       "text": "xxxxx",
  8.       "time": "17:11",
  9.       "count": 1,
  10.       "isSelf": true
  11.     },
  12.     {
  13.       "senderUid": "6845484",
  14.       "receiverUid": "6845481",
  15.       "serialNum": "A 1564737283216",
  16.       "msgId": 606897486704189400,
  17.       "text": "zzzz",
  18.       "time": "17:13",
  19.       "count": 2,
  20.       "isSelf": true
  21.     },
  22.     {
  23.       "senderUid": "6845481",
  24.       "receiverUid": "6845484",
  25.       "serialNum": "C 1564735983212",
  26.       "msgId": 606892034444533800,
  27.       "text": "C 文本消息 text 3",
  28.       "time": "16:52",
  29.       "count": 3
  30.     },
  31.     {
  32.       "senderUid": "6845481",
  33.       "receiverUid": "6845484",
  34.       "serialNum": "C 1564735426174",
  35.       "msgId": 606889698041045000,
  36.       "text": "C 文本消息 text 2",
  37.       "time": "16:42",
  38.       "count": 3
  39.     },
  40.     {
  41.       "senderUid": "6845481",
  42.       "receiverUid": "6845484",
  43.       "serialNum": "C 1564730001766",
  44.       "msgId": 606866947376980000,
  45.       "text": "C 文本消息 text 1",
  46.       "time": "15:12",
  47.       "count": 3
  48.     },
  49. ];
  51. let log = console.log;
  53. // time format & msgId
  54. log(`msgs =`, JSON.stringify(msgs, null, 4));
  56. // 1. sort by id
  57. msgs.sort((a, b) => (a.msgId > b.msgId) ? 1 : -1);
  59. log(`msgs =`, JSON.stringify(msgs, null, 4));
  61. // 2. group time
  63. ???

demo

https://repl.it/@xgqfrms/date-format-and-5-minutes

https://date-format-and-5-minutes.xgqfrms.repl.run/


  2. let msgs = [
  3.     {
  4.       "senderUid": "6845481",
  5.       "receiverUid": "6845484",
  6.       "serialNum": "C 1564735983212",
  7.       "msgId": 606892034444533800,
  8.       "text": "C 文本消息 text 3",
  9.       "time": "16:52",
  10.       "count": 3
  11.     },
  12.     {
  13.       "senderUid": "6845481",
  14.       "receiverUid": "6845484",
  15.       "serialNum": "C 1564735426174",
  16.       "msgId": 606889698041045000,
  17.       "text": "C 文本消息 text 2",
  18.       "time": "16:42",
  19.       "count": 3
  20.     },
  21.     {
  22.       "senderUid": "6845481",
  23.       "receiverUid": "6845484",
  24.       "serialNum": "C 1564730001766",
  25.       "msgId": 606866947376980000,
  26.       "text": "C 文本消息 text 1",
  27.       "time": "15:12",
  28.       "count": 3
  29.     },
  30.     {
  31.       "senderUid": "6845484",
  32.       "receiverUid": "6845481",
  33.       "serialNum": "A 1564737163253",
  34.       "msgId": 606896983568064500,
  35.       "text": "xxxxx",
  36.       "time": "17:11",
  37.       "count": 1,
  38.       "isSelf": true
  39.     },
  40.     {
  41.       "senderUid": "6845484",
  42.       "receiverUid": "6845481",
  43.       "serialNum": "A 1564737283216",
  44.       "msgId": 606897486704189400,
  45.       "text": "zzzz",
  46.       "time": "17:13",
  47.       "count": 2,
  48.       "isSelf": true
  49.     }
  50. ];
  52. let log = console.log;
  54. // time format & msgId
  55. // log(`msgs =`, JSON.stringify(msgs, null, 4));
  57. // 1. sort by id
  59. // 2. group time
  61. const list = [
  62.     {
  63.         color: 'white',
  64.         size: 'XXL',
  65.         num: 3,
  66.     },
  67.     {
  68.         color: 'red',
  69.         size: 'XL',
  70.         num: 1,
  71.     },
  72.     {
  73.         color: 'black',
  74.         size: 'M',
  75.         num: 7,
  76.     }
  77. ];
  79. log(`msgs =`, JSON.stringify(list, null, 4));
  81. list.sort((a, b) => (a.num > b.num) ? 1 : -1);
  83. log(`new msgs =`, JSON.stringify(list, null, 4));


js date string to timestamp

https://www.toptal.com/software/definitive-guide-to-datetime-manipulation

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/parse

https://stackoverflow.com/questions/18634087/how-to-convert-a-string-to-a-unix-timestamp-in-javascript



bug

OK


  2. // timestamp
  4. let t1 = new Date().getTime();
  5. let t11 = Date.parse('2019/08/02 18:54');
  7. let t2 = new Date("16:52");
  9. log(`t1 =`, t1);
  10. log(`t11 =`, t11);
  11. log(`t2 =`, t2);

seconds

autoGetToday

  3. const autoGetToday = (time = ``, debug = false) => {
  4.     let log = console.log;
  5.     let date = new Date();
  6.     let year = date.getFullYear();
  7.     let month = date.getMonth() + 1;
  8.     let day = date.getDate();
  9.     if (debug) {
  10.         log(year);
  11.         log(month);
  12.         log(day);
  13.     }
  14.     let today = `${year}/${month}/${day} ${time}`;
  15.     if (debug) {
  16.         log(`today =`, today);
  17.     }
  18.     return today;
  19. };
  21. autoGetToday(`19:20`, true);

five minutes


  2. let nowTime = Date.now();
  3. console.log(`nowTime =`, nowTime);
  5. let nowTime1 = Date.parse(`2019/08/02 17:18`);
  6. console.log(`nowTime1 =`, nowTime1);
  8. let nowTime2 = Date.parse(`2019/08/02 17:13`);
  9. console.log(`nowTime2 =`, nowTime2);
  11. let five = nowTime1 - nowTime2;
  12. console.log(`five =`, five);


  2. // mm, ss, ms
  3. const fiveMinutes = 5 * 60 * 1000;

OK


  2. let msgs = [
  3.     {
  4.       "senderUid": "6845484",
  5.       "receiverUid": "6845481",
  6.       "serialNum": "A 1564737163253",
  7.       "msgId": 606896983568064500,
  8.       "text": "B",
  9.       "time": "2019/08/02 17:11",
  10.       "count": 1,
  11.       "isSelf": true
  12.     },
  13.     {
  14.       "senderUid": "6845484",
  15.       "receiverUid": "6845481",
  16.       "serialNum": "A 1564737283216",
  17.       "msgId": 606897486704189400,
  18.       "text": "A",
  19.       "time": "2019/08/02 17:13",
  20.       "count": 2,
  21.       "isSelf": true
  22.     },
  23.     {
  24.       "senderUid": "6845481",
  25.       "receiverUid": "6845484",
  26.       "serialNum": "C 1564735983212",
  27.       "msgId": 606892034444533800,
  28.       "text": "C",
  29.       "time": "2019/08/02 16:52",
  30.       "count": 3
  31.     },
  32.     {
  33.       "senderUid": "6845481",
  34.       "receiverUid": "6845484",
  35.       "serialNum": "C 1564735426174",
  36.       "msgId": 606889698041045000,
  37.       "text": "D",
  38.       "time": "2019/08/02 16:42",
  39.       "count": 3
  40.     },
  41.     {
  42.       "senderUid": "6845481",
  43.       "receiverUid": "6845484",
  44.       "serialNum": "C 1564730001766",
  45.       "msgId": 606866947376980000,
  46.       "text": "E",
  47.       "time": "2019/08/02 15:12",
  48.       "count": 3
  49.     },
  50.     {
  51.       "senderUid": "6845481",
  52.       "receiverUid": "6845484",
  53.       "serialNum": "C 1564730001766",
  54.       "msgId": 606866947376970000,
  55.       "text": "G",
  56.       "time": "2019/08/01 5:12",
  57.       "count": 3
  58.     },
  59.     {
  60.       "senderUid": "6845481",
  61.       "receiverUid": "6845484",
  62.       "serialNum": "C 1564730001766",
  63.       "msgId": 606866947376910000,
  64.       "text": "F",
  65.       "time": "2019/08/01 15:12",
  66.       "count": 3
  67.     },
  68. ];
  70. let log = console.log;
  72. // time format & msgId
  73. // log(`msgs =`, JSON.stringify(msgs, null, 4));
  75. // 1. sort by id
  76. // asc & ascending
  77. // msgs.sort((a, b) => (a.msgId > b.msgId) ? 1 : -1);
  79. // desc & descending
  80. msgs.sort((a, b) => (a.msgId < b.msgId) ? 1 : -1);
  82. // log(`msgs =`, JSON.stringify(msgs, null, 4));
  84. // 2. group time
  85. // TODO  & groups
  86. let nowTime = Date.now();
  87. // log(`nowTime =`, nowTime);
  89. // mm, ss, ms
  90. const fiveMinutes = 5 * 60 * 1000;
  92. let DB = {};
  93. let len = msgs.length;
  95. let groupFlag = ``;
  96. if (msgs[0]) {
  97.     groupFlag = Date.parse(msgs[0].time);
  98. }
  100. let cp_msgs = msgs;
  102. let finished = false;
  104. // group flag
  105. for (let i = 0; i < len; i++) {
  106.     // filter
  107.     let new_cp_msgs = cp_msgs.filter(
  108.         (obj, k) => {
  109.             let {
  110.                 time,
  111.             } = obj;
  112.             if (time.includes(`/`)) {
  113.                 time = Date.parse(time);
  114.             } else {
  115.                 let today = autoGetToday(time);
  116.                 time = Date.parse(today);
  117.             }
  118.             let min = Math.abs(groupFlag - time);
  119.             if (min <= fiveMinutes) {
  120.                 // DB[i].push(obj);
  121.             } else {
  122.                 return obj;
  123.             }
  124.         }
  125.     );
  126.     if (cp_msgs.length <= 1 && finished) {
  127.         break;
  128.     } else {
  129.         DB[i] = [];
  130.     }
  131.     // if (cp_msgs.length <= 1) {
  132.     //     break;
  133.     // }
  134.     log(`cp_msgs =`, cp_msgs);
  135.     for (let j = 0; j < cp_msgs.length; j++) {
  136.         if (cp_msgs.length === 1) {
  137.             finished = true;
  138.         }
  139.         let obj = cp_msgs[j];
  140.         let {
  141.             time,
  142.         } = obj;
  143.         if (time.includes(`/`)) {
  144.             time = Date.parse(time);
  145.         } else {
  146.             let today = autoGetToday(time);
  147.             time = Date.parse(today);
  148.         }
  149.         let min = Math.abs(groupFlag - time);
  150.         if (min <= fiveMinutes) {
  151.             DB[i].push(obj);
  152.         } else {
  153.             groupFlag = time;
  154.             cp_msgs = new_cp_msgs;
  155.             break;
  156.         }
  157.     }
  158. }
  160. const autoGetToday = (time = ``, debug = false) => {
  161.     let log = console.log;
  162.     let date = new Date();
  163.     let year = date.getFullYear();
  164.     let month = date.getMonth() + 1;
  165.     let day = date.getDate();
  166.     if (debug) {
  167.         log(year);
  168.         log(month);
  169.         log(day);
  170.     }
  171.     let today = `${year}/${month}/${day} ${time}`;
  172.     if (debug) {
  173.         log(`today =`, today);
  174.     }
  175.     return today;
  176. };
  178. console.log(`DB groups =`, JSON.stringify(DB, null, 4));

xgqfrms 2012-2020

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