ajax - 计算 Json 字符串中的重复值并将值和标签存储在另一个字符串中

Question

我需要计算 json 数组中重复项目的数量，并将重复项目显示为单个项目，并且计数应该显示它重复了多少个项目。

请检查以下代码和输出以便您理解:

[{
    "Name": "Jacob",
    "Gender": "Male",
    "City": "Newyork",
    "State": "Newyork"
}, {
    "Name": "Mason",
    "Gender": "Male",
    "City": "Los Angeles",
    "State": "California"
}, {
    "Name": "Ethan",
    "Gender": "Male",
    "City": "Chicago",
    "State": "Illinois"
}, {
    "Name": "Noah",
    "Gender": "Male",
    "City": "Newyork",
    "State": "NewYork"
}, {
    "Name": "Sophia",
    "Gender": "Female",
    "City": "Los Angeles",
    "State": "California"
}, {
    "Name": "Emma",
    "Gender": "Female",
    "City": "Los Angeles",
    "State": "California"
}, {
    "Name": "Isabella",
    "Gender": "Female",
    "City": "Chicago",
    "State": "Illinois"
}, {
    "Name": "Olivia",
    "Gender": "Female",
    "City": "Chicago",
    "State": "Illinois"
}, {
    "Name": "Elizabeth",
    "Gender": "Female",
    "City": "Newyork",
    "State": "Newyork"
}, {
    "Name": "zoey",
    "Gender": "Female",
    "City": "Newyork",
    "State": "Newyork"
}]

所需的 json 输出是

Newyork : 4Times,

芝加哥:3次，

请找到 fiddle :

http://jsfiddle.net/vamsikrishna981/dMrNv/

Answer 1

试试这个 http://jsfiddle.net/RHYFC/

请参阅 fiddle 上的长版本和短版本

Javascript

var result = {};
for(var i = 0; i < data.length; i++){
    for(var item in data[i]){
        if(!result[item]){
            result[item] = {};
        }

        if(!result[item][data[i][item]]){
            result[item][data[i][item]] = 0;
        }

        result[item][data[i][item]]++;
    }
}