Javascript Array von Datum Wert Arrays reduzieren

Question

Ich bin sicher, es gibt eine einfache Lösung, aber ich kann es nicht finden. Ich übergebe ein Array von [Datum, Wert] Arrays an Highcharts, aber ich muss die Werte für doppelte Daten hinzufügen.

Ich suche ein neues Array mit den konsolidierten Ergebnissen.

[{ 
 
    "name": "actual", 
 
    "data": [ 
 
    [1396242000000, 592.685], 
 
    [1396242000000, 377.712], 
 
    [1404104400000, 316.74], 
 
    [1404104400000, 596.709], 
 
    [1412053200000, 579.066], 
 
    [1412053200000, 300.803], 
 
    [1420005600000, 596.497], 
 
    [1420005600000, 297.004], 
 
    [1427778000000, 435.818], 
 
    [1427778000000, 287.556], 
 
    [1435640400000, 446.788], 
 
    [1435640400000, 282.971], 
 
    [1443589200000, 270.027], 
 
    [1443589200000, 445.239], 
 
    [1451541600000, 258.869], 
 
    [1451541600000, 432.285], 
 
    [1459400400000, 266.438], 
 
    [1459400400000, 409.761], 
 
    [1467262800000, 408.126], 
 
    [1467262800000, 246.83], 
 
    [1475211600000, 395.026], 
 
    [1475211600000, 233.635] 
 
    ] 
 
}, { 
 
    "name": "forecast", 
 
    "data": [ 
 
    [1483164000000, 406.329], 
 
    [1483164000000, 240.611], 
 
    [1490936400000, 414.456], 
 
    [1490936400000, 241.814], 
 
    [1498798800000, 243.99], 
 
    [1498798800000, 422.745], 
 
    [1506747600000, 443.882], 
 
    [1506747600000, 246.43], 
 
    [1514700000000, 466.076], 
 
    [1514700000000, 253.823] 
 
    ] 
 
}]

Answer 1

var arr = [{ 
 
    "name": "actual", 
 
    "data": [ 
 
    [1396242000000, 592.685], 
 
    [1396242000000, 377.712], 
 
    [1404104400000, 316.74], 
 
    [1404104400000, 596.709], 
 
    [1412053200000, 579.066], 
 
    [1412053200000, 300.803], 
 
    [1420005600000, 596.497], 
 
    [1420005600000, 297.004], 
 
    [1427778000000, 435.818], 
 
    [1427778000000, 287.556], 
 
    [1435640400000, 446.788], 
 
    [1435640400000, 282.971], 
 
    [1443589200000, 270.027], 
 
    [1443589200000, 445.239], 
 
    [1451541600000, 258.869], 
 
    [1451541600000, 432.285], 
 
    [1459400400000, 266.438], 
 
    [1459400400000, 409.761], 
 
    [1467262800000, 408.126], 
 
    [1467262800000, 246.83], 
 
    [1475211600000, 395.026], 
 
    [1475211600000, 233.635] 
 
    ] 
 
}, { 
 
    "name": "forecast", 
 
    "data": [ 
 
    [1483164000000, 406.329], 
 
    [1483164000000, 240.611], 
 
    [1490936400000, 414.456], 
 
    [1490936400000, 241.814], 
 
    [1498798800000, 243.99], 
 
    [1498798800000, 422.745], 
 
    [1506747600000, 443.882], 
 
    [1506747600000, 246.43], 
 
    [1514700000000, 466.076], 
 
    [1514700000000, 253.823] 
 
    ] 
 
}]; 
 

 
arr.forEach(function(o) {      // for each object o in the array 
 
    var hash = {};        // the hash object, to store the indexes of times in the new array 
 
    o.data = o.data.reduce(function(newArr, e) { // reduce the data array of the object o 
 
    var index = hash[e[0]];     // get the index from the hash object of this time (e[0]) 
 
    if(index === undefined) {     // if index is undefined (this time is not hashed yet), then add e to the array and hash its index so it'll be used for duplicates 
 
     hash[e[0]] = newArr.push(e) - 1;   // push returns the new length so the index is the length - 1 
 
    } else {         // otherwise (the time is already hashed) 
 
     newArr[index][1] += e[1];    // then add the value of this element (e[1]) to the value of the already hashed element at index index 
 
    } 
 
    return newArr; 
 
    }, []); 
 
}); 
 

 
console.log(arr);

Answer 2

Versuchen Sie folgendes:

var actual = [ [1396242000000, 592.685], 
 
    [1396242000000, 377.712], 
 
    [1404104400000, 316.74], 
 
    [1404104400000, 596.709], 
 
    [1412053200000, 579.066], 
 
    [1412053200000, 300.803], 
 
    [1420005600000, 596.497], 
 
    [1420005600000, 297.004], 
 
    [1427778000000, 435.818], 
 
    [1427778000000, 287.556], 
 
    [1435640400000, 446.788], 
 
    [1435640400000, 282.971], 
 
    [1443589200000, 270.027], 
 
    [1443589200000, 445.239], 
 
    [1451541600000, 258.869], 
 
    [1451541600000, 432.285], 
 
    [1459400400000, 266.438], 
 
    [1459400400000, 409.761], 
 
    [1467262800000, 408.126], 
 
    [1467262800000, 246.83], 
 
    [1475211600000, 395.026], 
 
    [1475211600000, 233.635]]; 
 

 
var sum = {},result; 
 

 
for (var i=0,c;c=actual[i];++i) { 
 
    if (undefined === sum[c[0]]) {   
 
     sum[c[0]] = c; 
 
    } 
 
    else { 
 
     sum[c[0]][1] += c[1]; 
 
    } 
 
} 
 
result = Object.keys(sum).map(function(val) { return sum[val]}); 
 

 
alert(JSON.stringify(result));

Dann machen Sie das gleiche für die Vorhersage-Array.

Answer 3

Hier ist, wie ich es tun würde (vorausgesetzt, Sie in der Lage sind ES6 zu verwenden):

const data = [ 
    [1396242000000, 592.685], 
    [1396242000000, 377.712], 
    [1404104400000, 316.74], 
    [1404104400000, 596.709], 
    [1412053200000, 579.066], 
    [1412053200000, 300.803], 
    [1420005600000, 596.497], 
    [1420005600000, 297.004], 
    [1427778000000, 435.818], 
    [1427778000000, 287.556], 
    [1435640400000, 446.788], 
    [1435640400000, 282.971], 
    [1443589200000, 270.027], 
    [1443589200000, 445.239], 
    [1451541600000, 258.869], 
    [1451541600000, 432.285], 
    [1459400400000, 266.438], 
    [1459400400000, 409.761], 
    [1467262800000, 408.126], 
    [1467262800000, 246.83], 
    [1475211600000, 395.026], 
    [1475211600000, 233.635] 
]; 

const forecast = data.reduce((acc, val) => { 
    let existingForecast = acc.find(f => f[0] === val[0]); 
    existingForecast ? existingForecast[1] += val[1] : acc.push(val); 
    return acc; 
}, []); 

console.log(forecast);