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根据对象值创建子数组(两个对象的两个分组)

javascript

Datacrawler · 技术社区 · 6 年前

我有一个对象数组(dictionary是Python中的术语,但在本例中我使用的是 Javascript ).我想做的是把所有的东西都放在不同的对象中。我的第一次尝试是基于库存 客观的 价值观

我想我已经失去了逻辑,因为它不适用于第二组( ).

var inventory = [
    {ID: "K111", Objective: "One", Inventory: "Second" },
    {ID: "K112", Objective: "Two", Inventory: "Second" },
    {ID: "K113", Objective: "One", Inventory: "Second" },
    {ID: "K114", Objective: "Three", Inventory: "Second" },    
    {ID: "K132", Objective: "One", Inventory: "First" }
];

var OBJECTIVE = ["One", "Two", "Three"];
var INVENTORY = ["Second", "First"];

//Create arrays per Inventory (2 possible values)
for (var i = 0; i < INVENTORY.length; i++) {
 
  var variable = inventory.filter(function(el) {
      return el.Inventory == INVENTORY[i];
  });
  
  window['arr'+i] = variable;
  document.getElementById("arr"+i).innerHTML =JSON.stringify(variable);

}

//Create arrays per Objective for each array created above
for (var i = 0; i < OBJECTIVE.length; i++) {

  j = i + 2;
  var variable = arr0.filter(function(el) {
      return el.Objective == OBJECTIVE[i];
  });
  
  window['arr'+j] = JSON.stringify(variable);
  document.getElementById("arr"+j).innerHTML =JSON.stringify(variable);

}


for (var i = 0; i < OBJECTIVE.length; i++) {

  var variable = arr1.filter(function(el) {
      return el.Objective == OBJECTIVE[i];
  });
  
  window['arr'+j] = JSON.stringify(variable);
  document.getElementById("arr"+j).innerHTML =JSON.stringify(variable);

}

<div style="background:yellow;" id="arr0"></div>
<div style="background:green;" id="arr1"></div>
<div style="background:grey;" id="arr2"></div>
<div style="background:blue; color:white;" id="arr3"></div>
<div style="background:red; color:white;" id="arr4"></div>
<div style="background:black; color:white;" id="arr5"></div>
<div style="background:orange;" id="arr6"></div>

1 回复 | 直到 6 年前

Nenad Vracar 6 年前

reduce 方法,首先按库存进行分组,然后按目标进行分组。要返回数组数组作为结果,可以使用 Object.values map .

var data = [{ID: "K111", Objective: "One", Inventory: "Second" },{ID: "K112", Objective: "Two", Inventory: "Second" },{ID: "K113", Objective: "One", Inventory: "Second" },{ID: "K114", Objective: "Three", Inventory: "Second" },    {ID: "K132", Objective: "One", Inventory: "First" }];

var res = data.reduce((r, e) => {
  let {Objective, Inventory} = e;
  r[Inventory] = r[Inventory] || {}
  r[Inventory][Objective] = r[Inventory][Objective] || {}
  Object.assign(r[Inventory][Objective], e);
  return r;
}, {})

var array = Object.values(res).map(Object.values)

console.log(array)
console.log(res)