JavaScript的 - 对象数组内重复计数 [英] JavaScript - Count duplicates within an Array of Objects

问题描述

我有对象的数组我的服务器端JS中如下：

  [
    {
        公司：IBM
    }，
    {
        人：ACORD LOMA
    }，
    {
        公司：IBM
    }，
    {
        公司：MSFT
    }，
    {
        地方：纽约
    }
]
 

我需要通过这个结构进行迭代，检测任何重复，然后创建一个重复的计数沿侧发现每个值。

这两个值必须匹配例如有资格作为重复公司：IBM不是公司比赛：MSFT

我如果需要改变对象的入阵的选项。我想输出是一个对象，但真的很努力得到这个工作。

编辑：这里是code我至今在这里processArray是上面列出的阵列

  VAR returnObj = {};    为（变量X = 0; X＆下; processArray.length; X ++）{        //检查是否已经有数组项作为回报的obj的关键
        returnObj [processArray [X]] = returnObj [processArray [X]] || processArray [X]的ToString（）;        //设置计数场
        returnObj [processArray [X]。COUNT = returnObj [processArray [X]。算|| 1;        //增加计数
        returnObj [processArray [X] =计数returnObj [processArray [X]数+ 1。    }
    的console.log（'===================='+ JSON.stringify（returnObj））;
 

解决方案

例如：

 计数器= {}yourArray.forEach（函数（OBJ）{
    VAR键= JSON.stringify（OBJ）
    计数器[关键] =（计数器[关键] || 0）+ 1
}）
 

文件：<一href=\"https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/forEach\">Array.forEach, <一href=\"https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/JSON/stringify\">JSON.stringify.

I have an array of objects as follows within my server side JS:

[
    {
        "Company": "IBM"
    },
    {
        "Person": "ACORD LOMA"
    },
    {
        "Company": "IBM"
    },
    {
        "Company": "MSFT"
    },
    {
        "Place": "New York"
    }
]

I need to iterate through this structure, detect any duplicates and then create a count of a duplicate is found along side each value.

Both of the values must match to qualify as a duplicate e.g. "Company": "IBM" is not a match for "Company": "MSFT".

I have the options of changing the inbound array of objects if needed. I would like the output to be an object, but am really struggling to get this to work.

EDIT: Here is the code I have so far where processArray is the array as listed above.

var returnObj = {};

    for(var x=0; x < processArray.length; x++){

        //Check if we already have the array item as a key in the return obj
        returnObj[processArray[x]] = returnObj[processArray[x]] || processArray[x].toString();

        // Setup the count field
        returnObj[processArray[x]].count = returnObj[processArray[x]].count || 1;

        // Increment the count
        returnObj[processArray[x]].count = returnObj[processArray[x]].count + 1;

    }
    console.log('====================' + JSON.stringify(returnObj));

解决方案

For example:

counter = {}

yourArray.forEach(function(obj) {
    var key = JSON.stringify(obj)
    counter[key] = (counter[key] || 0) + 1
})

Docs: Array.forEach, JSON.stringify.

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