重組JSON的具體規則

Question

我在JavaScript中JSON對象的列表如下：

[{"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}] 

現在我需要找出所有具有相同model值線，然後添加一個include第一項的關鍵，最後使include鍵的值成爲剩餘「相同模型」行的列表。

輸出應該是這樣的：

[{"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}]}] 

任何人都可以給我如何實現這一個方向？

Answer 1

爲此，您可以用forEach環和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

您可以使用Array Reduce

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));