将嵌套对象展平为一维数组javascript [英] Flatten a nested objects to one dimensional array javascript

问题描述

我在此结构中有一个嵌套对象:

I have a nested objects in this structure:

myArray = {
  "D": {
    "U": {
      "A300": "B300",
      "A326": "B326",
      "A344": "B344",
      "A345": "B345"
    },
    "P": {
      "A664": "B664",
      "A756": "B756"
    }
  },
  "I": {
    "U": {
      "A300": "B300",
      "A326": "B326"
    },
    "P": {
      "A756": "B756"
    }
  }
};

我正在尝试从中获取数据仅为一维(平面).我尝试了下面的代码，但没有用:

I am trying to get the data out of it to be only one dimensional (Flatten). I tried the code below but it doesn't work:

var myNewArray = [].concat.apply([], myArray);

和

var myNewArray = myArray.reduce(function(prev, curr) {
  return prev.concat(curr);
});

我希望myNewArray具有["B300","B326","B344","B345","B664","B756"]

推荐答案

您可以执行以下操作:

var myArray = [];
myArray[0] = [];
myArray[0][0] = [];
myArray[0][0][0] = [];
myArray[0][0][1] = [];
myArray[0][1] = [];
myArray[0][1][0] = [];

myArray[0][0][0][0] = "abc1";
myArray[0][0][0][1] = "abc2";
myArray[0][0][1][0] = "abc3";
myArray[0][1][0][1] = "abc4";
myArray[0][1][0][1] = "abc5";


function flat(acc, val){
  if(Array.isArray(val)){
     acc = acc.concat(val.reduce(flat, []));
  }else{
   acc.push(val);
  }
  return acc;
}

var newMyArray = myArray.reduce(flat, []);
console.log(newMyArray);

这是递归地减少作为数组的所有内部值.

What this does is to recursively reduce all the inner values that are arrays.

似乎您正在处理一个对象.您问题的上一个标题和变量名称具有误导性.

It seems that you're dealing with an object. The previous title of your question and the name of the variable are misleading.

在任何情况下，展平对象都是非常相似的过程.

In any case, flattening an object is a very similar process.

var myArray = {"D":{"U":{"A300":"B300","A326":"B326","A344":"B344","A345":"B345"},"P":{"A664":"B664","A756":"B756"}},"I":{"U":{"A300":"B300","A326":"B326"},"P":{"A756":"B756"}}};

function flatObj(obj){
   return Object.keys(obj).reduce(function(acc, key){
     if(typeof obj[key] === "object"){
        acc = acc.concat(flatObj(obj[key]));
     }else{
        acc.push(obj[key]);
     }
     return acc;
   }, []);
}


var newMyArray = flatObj(myArray);
console.log(newMyArray);

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