重构JSON [英] Re-Structuring a JSON

问题描述

好的家伙需要一些帮助。我还在学习Javascript及其交互JSON。我有这样的JSON

OK guys need some help out there. I'm still learning Javascript and its interactions JSON. I have a a JSON like this

[{
  "categories":"Food",
  "subcategories":"Shares",
  "pid":"111",
  "title":"Smoked Salmon Dip",
  "description":"Rich and savory salmon dip, whipped with fresh dill accompanied with     croustades"
   },
   {
  "categories":"Food",
  "subcategories":"Shares",
  "pid":"112",
  "title":"Sweet Goat Cheese Flatbread",
  "description":"Delicate grilled Naan flatbread coated with delish tomato jam and topped with melted goat cheese, roasted garlic, fennel, onion, pear, shiitake mushroom and arugula."
 },
 {
  "categories":"Food",
  "subcategories":"Snacks",
  "pid":"100",
  "title":"Beer Chili",
  "description":"Hot & satisfying short rib chili with black beans, smoked jalapenos, and fresh corn. Topped with aged cheddar cheese and sour cream."
 }];

但我需要的是一个看起来像这样的JSON

But what I need is an JSON that looks like this

{
 "menu":{
  "categories":[
     {
                "name":"Food",
                "subcategories":[
                    {
                    "name":"Shares",
                    "items":[
                        {
                        "pid":"111",
                        "title":"Smoked Salmon Dip",
                        "description":"Rich and savory salmon dip, whipped with fresh dill accompanied with croustades"
                        },
                        {
                        "pid":"112",
                        "title":"Sweet Goat Cheese Flatbread",
                        "description":"Delicate grilled Naan flatbread coated with delish tomato jam and topped with melted goat cheese, roasted garlic, fennel, onion, pear, shiitake mushroom and arugula."
                        }
                        ]
                    },
                    {
                    "name":"Snacks",
                    "items":[
                        {                       
                        "pid":"100",
                        "title":"Beer Chili",
                        "description":"Hot & satisfying short rib chili with black beans, smoked jalapenos, and fresh corn. Topped with aged cheddar cheese and sour cream."
                        }
                        ]
                    }
                    ]
        }]
        }
     }

我知道它有点难看，但是当我迭代现有的JSON时，我无法弄清楚如何构建新的JSON。

I know its a bit ugly and but I'm having trouble figuring out how to build the new JSON as i iterate through my current one.

让我前进的任何帮助都很棒

Any help getting me going would be awesome

推荐答案

我锻炼了一个解决方案，但我'我不知道它将如何处理大的json数据。假设 json var存储您的数据：

I workout a solution, but I'm not sure how it will handle big json data. Assume that the json var stores your data:

categories = [];
json.forEach(function(entry) {  
    var cindex = categories.map(function(category) { 
        return category.name; 
    }).indexOf(entry.categories);

    if (cindex < 0) {
        // Not found in categories array
        cindex = categories.push({
            name: entry.categories,
            subcategories: []
        }) - 1; // -1 to fix the index
    }

    // Lets search the subcategory
    var category = categories[cindex];

    var sindex = category.subcategories.map(
        function(subcategory) {
            return subcategory.name;
        }
    ).indexOf(entry.subcategories);

    if (sindex < 0) {
      // Not Found
        sindex = category.subcategories.push({
            name: entry.subcategories,
            items: []
        }) - 1; 
    } 
    // Subcategory exists. Just push
    category.subcategories[sindex].items.push({
        pid: entry.pid,        
        description: entry.description,
        title: entry.title
    });
});

var menu = {
    menu: {
        categories: categories
    }
};

工作小提琴

这篇关于重构JSON的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！