Restructuring JSON mit JavaScript durch spezifische Regeln

Question

ich eine Liste von JSON-Objekte in Javascript, haben wie folgt aussieht:

[{"model":"alpha", "ports":4}, 
{"model":"beta", "ports":4}, 
{"model":"beta", "ports":1}, 
{"model":"beta", "ports":43}, 
{"model":"gamma", "ports":66}, 
{"model":"omega", "ports":6}, 
{"model":"omega", "ports":1}] 

Jetzt muss ich alle Linien herauszufinden, welche die gleiche model Wert haben, dann fügen Sie ein include Schlüssel zum ersten Element, in dem schließlich der Wert des include Schlüssels eine Liste der übrigen "gleichen Modell" -Linien sein soll.

Ausgabe sollte wie folgt sein:

[{"model":"alpha", "ports":4}, 
{"model":"beta", "ports":4, "include":[ 
{"model":"beta", "ports":1}, 
{"model":"beta", "ports":43}]}, 
{"model":"gamma", "ports":66}, 
{"model":"omega", "ports":6, "include":[ 
{"model":"omega", "ports":1}]}] 

Wer mir eine Richtung, wie dies zu erreichen geben könnte?

Answer 1

Sie können dies tun, mit forEach Schleife und thisArg param

var data = [{"model":"alpha", "ports":4}, 
 
{"model":"beta", "ports":4}, 
 
{"model":"beta", "ports":1}, 
 
{"model":"beta", "ports":43}, 
 
{"model":"gamma", "ports":66}, 
 
{"model":"omega", "ports":6}, 
 
{"model":"omega", "ports":1}]; 
 

 
var result = []; 
 

 
data.forEach(function(e) { 
 
    if(!this[e.model]) { 
 
    this[e.model] = e; 
 
    result.push(this[e.model]); 
 
    } else { 
 
    this[e.model].include = (this[e.model].include || []).concat(e); 
 
    } 
 
}, {}); 
 

 
console.log(result)

Answer 2

Sie Array Reduce

können

var obj =[{"model":"alpha", "ports":4}, 
 
{"model":"beta", "ports":4}, 
 
{"model":"beta", "ports":1}, 
 
{"model":"beta", "ports":43}, 
 
{"model":"gamma", "ports":66}, 
 
{"model":"omega", "ports":6}, 
 
{"model":"omega", "ports":1}]; 
 

 
var res = obj.reduce(function(obj,currentValue){ 
 
    if (obj.length && obj[obj.length-1].model == currentValue.model){ 
 
    obj[obj.length-1].include=obj[obj.length-1].include || []; 
 
    obj[obj.length-1].include.push(currentValue); 
 
    }else{ 
 
    obj.push(currentValue) 
 
    } 
 
    return obj; 
 
},[]); 
 
console.log(res);

Answer 3

function processData(data) { 
    return data.reduce(function (result, item) { 
    var first = result.find(function (i) { 
     return i.model === item.model; 
    }); 
    if (!first) { 
     item.include = []; 
     result.push(item); 
    } else { 
     first.include.push(item); 
    } 
    return result; 
    }, []); 
} 

var data = [{"model":"alpha", "ports":4}, 
    {"model":"beta", "ports":4}, 
    {"model":"beta", "ports":1}, 
    {"model":"beta", "ports":43}, 
    {"model":"gamma", "ports":66}, 
    {"model":"omega", "ports":6}, 
    {"model":"omega", "ports":1}]; 

console.log(processData(data));